Document:

EX-4.4

 Exhibit 4.4 

Execution Version 

WARRANT AGREEMENT 
 by and between

 DECARBONIZATION PLUS ACQUISITION CORPORATION, 

and 
 CONTINENTAL STOCK
TRANSFER & TRUST COMPANY 
 THIS WARRANT AGREEMENT (this “Agreement”), dated as of July 16, 2021, is
by and between Decarbonization Plus Acquisition Corporation, a Delaware corporation (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (the “Warrant
Agent”, also referred to herein as the “Transfer Agent”). 
 WHEREAS, on February 8, 2021, the
Company entered into that certain Business Combination Agreement and Plan of Reorganization (the “BCA”), by and among the Company, DCRB Merger Sub Inc., a Delaware corporation (“Merger Sub”) and Hyzon
Motors Inc. (“Hyzon”), pursuant to which, among other things, Merger Sub will merge with and into the Hyzon, with Hyzon surviving the merger as a wholly owned subsidiary of the Company; 

WHEREAS, concurrent with the signing of the BCA, the Company entered into a Subscription Agreement with ACP Mgmt Corp., a Delaware corporation
(“Ardour”), Ardour Capital Investments LLC, a Delaware limited liability company (the “Financial Advisor”) and Hyzon (the “Subscription Agreement”), pursuant to which the
Company agreed to issue the Warrants (as defined therein). 
 WHEREAS, the Company desires the Warrant Agent to act on behalf of the
Company, and the Warrant Agent is willing to so act, in connection with the issuance, registration, transfer, exchange, redemption and exercise of the Warrants; 

WHEREAS, the Company desires to provide for the form and provisions of the Warrants, the terms upon which they shall be issued and exercised,
and the respective rights, limitation of rights, and immunities of the Company, the Warrant Agent, and the holders of the 
 Warrants; and 

WHEREAS, all acts and things have been done and performed which are necessary to make the Warrants, when executed on behalf of the Company and
countersigned by or on behalf of the Warrant Agent, as provided herein, the valid, binding and legal obligations of the Company, and to authorize the execution and delivery of this Agreement. 

NOW, THEREFORE, in consideration of the mutual agreements herein contained, the parties hereto agree as follows: 

1.    Appointment of Warrant Agent. The Company hereby appoints the Warrant Agent to act as agent for the Company for the Warrants,
and the Warrant Agent hereby accepts such appointment and agrees to perform the same in accordance with the terms and conditions set forth in this Agreement. 

 2.    Warrants. 

2.1    Form of Warrant. Each Warrant shall be issued in registered form only. 

2.2    Effect of Countersignature. If a physical certificate is issued, unless and until countersigned by the
Warrant Agent pursuant to this Agreement, a Warrant shall be invalid and of no effect and may not be exercised by the holder thereof. 

2.3    Registration. 

2.3.1    Warrant Register. The Warrant Agent shall maintain books (the “Warrant Register”)
for the registration of original issuance and the registration of transfer of the Warrants. Upon the initial issuance of the Warrants, the Warrant Agent shall issue and register the Warrants in the names of the respective holders thereof in such
denominations and otherwise in accordance with instructions delivered to the Warrant Agent by the Company. 
 Physical certificates, if
issued, shall be signed by, or bear the facsimile signature of, the Chairman of the Board, Chief Executive Officer, Chief Financial Officer, Secretary or other principal officer of the Company. In the event the person whose facsimile signature has
been placed upon any Warrant shall have ceased to serve in the capacity in which such person signed the Warrant before such Warrant is issued, it may be issued with the same effect as if he or she had not ceased to be such at the date of issuance.

 2.3.2    Registered Holder. Prior to due presentment for registration of transfer of any Warrant, the Company
and the Warrant Agent may deem and treat the person in whose name such Warrant is registered in the Warrant Register (the “Registered Holder”) as the absolute owner of such Warrant and of each Warrant represented thereby
(notwithstanding any notation of ownership or other writing on any physical certificate made by anyone other than the Company or the Warrant Agent), for the purpose of any exercise thereof, and for all other purposes, and neither the Company nor the
Warrant Agent shall be affected by any notice to the contrary. 
 2.4    No Fractional Warrants. The Company
shall not issue fractional Warrants. 
 2.5    Rights Under Other Documents. The Warrants will be issued pursuant
to the Subscription Agreement, and the Registered Holder is entitled to the rights and benefits set forth in such agreement (as such agreement may be amended, modified or restated in accordance with their terms). 

3.    Terms and Exercise of Warrants. 

3.1    Warrant Price. Each Warrant shall, when countersigned by the Warrant Agent, entitle the Registered Holder
thereof, subject to the provisions of such Warrant and of this Agreement, to purchase from the Company the number of shares of Common Stock stated therein, at the price of $2.20 per share, subject to the adjustments provided in Section 4
hereof and in the last sentence of this Section 3.1. The term “Warrant Price” as used in this Agreement shall mean the price per share at which shares of Common Stock may be purchased at the time a Warrant is
exercised. The Company in its sole discretion may lower the Warrant Price at any time prior to the Expiration Date (as defined below) for a period of not less than twenty (20) Business Days, provided, that the Company shall provide at least
twenty (20) days prior written 

  
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notice of such reduction to Registered Holders of the Warrants and, provided further that any such reduction shall be identical among all of the Warrants; and provided, further, that, in the
event that the Company lowers the “Warrant Price” of any of the Public Warrants, the Warrant Price shall be lowered on an equivalent basis. For purposes hereof, “Public Warrants” means, collectively, the redeemable warrants
originally issued by the Company as part of the units in the Company’s initial public offering, the warrants issued in a private placement simultaneously with the closing of such initial public offering and any other warrants issued by the
Company prior to, substantially contemporaneously with, or otherwise in connection with, the Closing (as defined in the BCA). 

3.2    Duration of Warrants. A Warrant may be exercised only during the period (the “Exercise
Period”) commencing on the date that is thirty (30) days after the Closing , and terminating at 5:00 p.m., New York City time on the earlier to occur of: (w) the date that is five (5) years after the Closing, (x) the
liquidation of the Company, (y) the Redemption Date (as defined below) as provided in Section 6.3 hereof, or (z) the Alternative Redemption Date (as defined below) as provided in Section 6.2 hereof (the
“Expiration Date”). Except with respect to the right to receive the Redemption Price (as defined below) or the Alternative Redemption Price, in the event of a redemption as set forth in Section 6 hereof (and
subject to the terms and conditions thereof), each Warrant not exercised on or before the Expiration Date shall become void, and all rights thereunder and all rights in respect thereof under this Agreement shall cease at 5:00 p.m. New York City time
on the Expiration Date. The Company in its sole discretion may extend the duration of the Warrants by delaying the Expiration Date; provided, that the Company shall provide at least twenty (20) days prior written notice of any such
extension to Registered Holders of the Warrants and, provided further that any such extension shall be identical in duration among all the Warrants; and provided, further, that, in the event that the Company extends the duration of any of the Public
Warrants, the duration of the Warrants shall be extended on an equivalent basis. 
 3.3    Exercise of Warrants.

 3.3.1    Payment. Subject to the provisions of the Warrant and this Agreement, a Warrant, when countersigned
by the Warrant Agent, may be exercised by the Registered Holder thereof by surrendering it, at the office of the Warrant Agent, or at the office of its successor as Warrant Agent, in the Borough of Manhattan, City and State of New York, with the
subscription form, as set forth in the Warrant, duly executed, and paying in full the Warrant Price for each full share of Common Stock as to which the Warrant is exercised and any and all applicable taxes due in connection with the exercise of the
Warrant, the exchange of the Warrant for the shares of Common Stock and the issuance of such shares of Common Stock, as follows: 
 (a) in
lawful money of the United States, by wire transfer or in good certified check or good bank draft payable to the Warrant Agent; 

(b)    in the event that the Warrants are to be exercised upon a “cashless basis,” pursuant to the terms hereof,
by surrendering the Warrants for that number of shares of Common Stock equal to the quotient obtained by dividing (x) the product of the number of shares of Common Stock underlying the Warrants, multiplied by the excess of the “Fair Market
Value”, as defined in this subsection 3.3.1(b), over the Warrant Price by (y) the Fair Market Value. Solely 

  
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for purposes of this subsection 3.3.1(b), the “Fair Market Value” shall mean the reported last sale price of the Common Stock for the ten (10) trading days ending on the
third trading day prior to the date on which the notice of redemption is sent to the holders of the Warrants, pursuant to Section 6 hereof; or 

(c)    as provided in Section 6.2 hereof with respect to a Make-Whole Exercise. 

3.3.2    Issuance of Shares of Common Stock on Exercise. As soon as practicable after the exercise of any Warrant
and the clearance of the funds in payment of the Warrant Price (if payment is pursuant to subsection 3.3.1(a)), the Company shall issue to the Registered Holder of such Warrant a certificate for the number of full shares of Common Stock to
which he, she or it is entitled, registered in such name or names as may be directed by him, her or it, and if such Warrant shall not have been exercised in full and is surrendered to the Company, a countersigned Warrant for the number of shares of
Common Stock as to which such Warrant shall not have been exercised. In no event will the Company be required to net cash settle the Warrant exercise. The Company may require holders of the Warrants to settle Warrant exercises on a “cashless
basis” pursuant to Section 7.4. If, by reason of any exercise of warrants on a “cashless basis”, the holder of any Warrant would be entitled, upon the exercise of such Warrant, to receive a fractional interest in a share
of Common Stock, the Company shall round down to the nearest whole number the number of shares of Common Stock to be issued to such holder. Notwithstanding the foregoing or anything else to the contrary contained herein, the Registered Holder shall
not be required to surrender any Warrant to the Company until the Registered Holder has purchased all of the shares available thereunder and such Warrant has been exercised in full, in which case the Registered Holder shall surrender such Warrant to
the Company for cancellation within three (3) trading days following the date the final subscription form is delivered to the Company. Execution and delivery of a subscription form with respect to a partial exercise shall have the same effect
as cancellation of the original Warrant and issuance of a new Warrant evidencing the right to purchase the remaining number of shares of Common Stock. 

3.3.3    Valid Issuance. All shares of Common Stock issued upon the proper exercise of a Warrant in conformity with
this Agreement shall be validly issued, fully paid and non-assessable. 

3.3.4    Date of Exercise/Issuance. The “date of exercise” of any Warrant shall be defined as the date
that the subscription form, as set forth in the Warrant, completed and executed, is sent by facsimile or electronic mail to the Company, provided that payment of the Warrant Price, if applicable, is satisfied as soon as practicable thereafter but no
later than two (2) trading days after the date of exercise. In the event that the Warrant Price (if applicable) set forth in the subscription form is not paid to the Company by the deadline therefor, as set forth in the preceding sentence, the
date of exercise shall be such date as such Warrant Price is received by the Company. Each person in whose name any certificate for shares of Common Stock is to be issued shall for all purposes be deemed to have become the holder of record of such
shares of Common Stock on the date of exercise of the Warrant, irrespective of the date of delivery of such certificate, except that, if the date of such exercise is a date when the share transfer books of the Company are closed, such person shall
be deemed to have become the holder of such shares of Common Stock at the close of business on the next succeeding date on which the share transfer books are open. 

  
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 3.3.5    Maximum Percentage. A holder of a Warrant may notify the
Company in writing in the event it elects to be subject to the provisions contained in this subsection 3.3.5; however, no holder of a Warrant shall be subject to this subsection 3.3.5 unless he, she or it makes such election. If the
election is made by a holder, the Warrant Agent shall not effect the exercise of the holder’s Warrant, and such holder shall not have the right to exercise such Warrant, to the extent that after giving effect to such exercise, such person
(together with such person’s affiliates), to the Warrant Agent’s actual knowledge, would beneficially own in excess of 9.8% or such other amount as the holder may specify (the “Maximum Percentage”) of the shares of
Common Stock outstanding immediately after giving effect to such exercise. For purposes of the foregoing sentence, the aggregate number of shares of Common Stock beneficially owned by such person and its affiliates shall include the number of shares
of Common Stock issuable upon exercise of the Warrant with respect to which the determination of such sentence is being made, but shall exclude shares of Common Stock that would be issuable upon (x) exercise of the remaining, unexercised
portion of the Warrant beneficially owned by such person and its affiliates and (y) exercise or conversion of the unexercised or unconverted portion of any other securities of the Company beneficially owned by such person and its affiliates
(including, without limitation, any convertible notes or convertible preferred stock or warrants) subject to a limitation on conversion or exercise analogous to the limitation contained herein. Except as set forth in the preceding sentence, for
purposes of this paragraph, beneficial ownership shall be calculated in accordance with Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). For purposes of the Warrant, in determining
the number of outstanding shares of Common Stock, the holder may rely on the number of outstanding shares of Common Stock as reflected in (1) the Company’s most recent annual report on Form 10-K,
quarterly report on Form 10-Q, current report on Form 8-K or other public filing with the Commission as the case may be, (2) a more recent public announcement by
the Company or (3) any other notice by the Company or the Transfer Agent setting forth the number of shares of Common Stock outstanding. For any reason at any time, upon the written request of the holder of the Warrant, the Company shall,
within two (2) Business Days, confirm orally and in writing to such holder the number of shares of Common Stock then outstanding. In any case, the number of outstanding shares of Common Stock shall be determined after giving effect to the
conversion or exercise of equity securities of the Company by the holder and its affiliates since the date as of which such number of outstanding shares of Common Stock was reported. By written notice to the Company, the holder of a Warrant may from
time to time increase or decrease the Maximum Percentage applicable to such holder to any other percentage specified in such notice; provided, however, that any such increase shall not be effective until the sixty-first (61st) day after such notice
is delivered to the Company. 
 4.    Adjustments. 

4.1    Stock Dividends. 

4.1.1 Split-Ups. If after the date hereof, and subject to the provisions of
Section 4.6 below, the number of outstanding shares of Common Stock is increased by a stock dividend payable in shares of Common Stock, or by a split-up of shares of Common Stock or other similar

  
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event, then, on the effective date of such stock dividend, split-up or similar event, the number of shares of Common Stock issuable on exercise of each
Warrant shall be increased in proportion to such increase in the outstanding shares of Common Stock. A rights offering to holders of the Common Stock entitling holders to purchase shares of Common Stock at a price less than the “Fair
Market Value” (as defined below) shall be deemed a stock dividend of a number of shares of Common Stock equal to the product of (i) the number of shares of Common Stock actually sold in such rights offering (or issuable under any
other equity securities sold in such rights offering that are convertible into or exercisable for the Common Stock) multiplied by (ii) one (1) minus the quotient of (x) the price per share of Common Stock paid
in such rights offering divided by (y) the Fair Market Value. For purposes of this subsection 4.1.1, (i) if the rights offering is for securities convertible into or exercisable for Common Stock, in determining the price payable for
Common Stock, there shall be taken into account any consideration received for such rights, as well as any additional amount payable upon exercise or conversion and (ii) “Fair Market Value” means the volume weighted average price of the
Common Stock as reported during the ten (10) trading day period ending on the trading day prior to the first date on which the shares of Common Stock trade on the applicable exchange or in the applicable market, regular way, without the right
to receive such rights. 
 4.1.2    Extraordinary Dividends. If the Company, at any time while the Warrants are
outstanding and unexpired, shall pay a dividend or make a distribution in cash, securities or other assets to the holders of the Common Stock on account of such shares of Common Stock (or other shares of the Company’s capital stock into which
the Warrants are convertible), other than (a) as described in subsection 4.1.1 above, or (b) Ordinary Cash Dividends (as defined below) (any such non-excluded event being referred to herein as
an “Extraordinary Dividend”), then the Warrant Price shall be decreased, effective immediately after the effective date of such Extraordinary Dividend, by the amount of cash and/or the fair market value (as determined by the
Board, in good faith) of any securities or other assets paid on each share of Common Stock in respect of such Extraordinary Dividend. For purposes of this subsection 4.1.2, “Ordinary Cash Dividends” means any cash
dividend or cash distribution which, when combined on a per share basis, with the per share amounts of all other cash dividends and cash distributions paid on the Common Stock during the 365-day period ending
on the date of declaration of such dividend or distribution (as adjusted to appropriately reflect any of the events referred to in other subsections of this Section 4 and excluding cash dividends or cash distributions that resulted in an
adjustment to the Warrant Price or to the number of shares of Common Stock issuable on exercise of each Warrant) does not exceed $0.50(being 5% of the offering price of the Units in the Company’s initial public offering). 

4.2    Aggregation of Shares. If after the date hereof, and subject to the provisions of Section 4.6
hereof, the number of outstanding shares of Common Stock is decreased by a consolidation, combination, reverse stock split or reclassification of shares of Common Stock or other similar event, then, on the effective date of such consolidation,
combination, reverse stock split, reclassification or similar event, the number of shares of Common Stock issuable on exercise of each Warrant shall be decreased in proportion to such decrease in outstanding shares of Common Stock. 

  
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 4.3    Adjustments in Exercise and Redemption Trigger Prices.
Whenever the number of shares of Common Stock purchasable upon the exercise of the Warrants is adjusted, as provided in subsection 4.1.1 or Section 4.2 above, the Warrant Price shall be adjusted (to the nearest cent) by
multiplying such Warrant Price immediately prior to such adjustment by a fraction (x) the numerator of which shall be the number of shares of Common Stock purchasable upon the exercise of the Warrants immediately prior to such adjustment, and
(y) the denominator of which shall be the number of shares of Common Stock so purchasable immediately thereafter. 

4.4    Replacement of Securities upon Reorganization, etc. In case of any reclassification or reorganization of the
outstanding shares of Common Stock (other than a change under subsection 4.1.1 or subsection 4.1.2 or Section 4.2 hereof or that solely affects the par value of such shares of Common Stock), or in the case of any merger or
consolidation of the Company with or into another corporation (other than a consolidation or merger in which the Company is the continuing corporation and that does not result in any reclassification or reorganization of the outstanding shares of
Common Stock), or in the case of any sale or conveyance to another corporation or entity of the assets or other property of the Company as an entirety or substantially as an entirety in connection with which the Company is dissolved, the holders of
the Warrants shall thereafter have the right to purchase and receive, upon the basis and upon the terms and conditions specified in the Warrants and in lieu of the shares of Common Stock of the Company immediately theretofore purchasable and
receivable upon the exercise of the rights represented thereby, the kind and amount of shares of stock or other securities or property (including cash) receivable upon such reclassification, reorganization, merger or consolidation, or upon a
dissolution following any such sale or transfer, that the holder of the Warrants would have received if such holder had exercised his, her or its Warrant(s) immediately prior to such event (the “Alternative Issuance” );
provided, however, that (i) if the holders of the Common Stock were entitled to exercise a right of election as to the kind or amount of securities, cash or other assets receivable upon such consolidation or merger, then the kind
and amount of securities, cash or other assets constituting the Alternative Issuance for which each Warrant shall become exercisable shall be deemed to be the weighted average of the kind and amount received per share by the holders of the Common
Stock in such consolidation or merger that affirmatively make such election, and (ii) if a tender, exchange or redemption offer shall have been made to and accepted by the holders of the Common Stock under circumstances in which, upon
completion of such tender or exchange offer, the maker thereof, together with members of any group (within the meaning of Rule 13d-5(b)(1) under the Exchange Act (or any successor rule)) of which such maker is
a part, and together with any affiliate or associate of such maker (within the meaning of Rule 12b-2 under the Exchange Act (or any successor rule)) and any members of any such group of which any such
affiliate or associate is a part, own beneficially (within the meaning of Rule 13d-3 under the Exchange Act (or any successor rule)) more than 50% of the outstanding shares of Common Stock, the holder of a
Warrant shall be entitled to receive as the Alternative Issuance, the highest amount of cash, securities or other property to which such holder would actually have been entitled as a stockholder if such Warrant holder had exercised the Warrant prior
to the expiration of such tender or exchange offer, accepted such offer and all of the Common Stock held by such holder had been purchased pursuant to such tender or exchange offer, subject to adjustments (from and after the consummation of such
tender or exchange offer) as nearly equivalent as possible to the adjustments provided for in this Section 4; provided, further, that if less than 70% of the consideration receivable by the holders of the Common Stock in the applicable
event is payable in the form of common stock in the successor entity that is listed for trading on a national securities exchange or is quoted in an established
over-the-counter market, or is to be so listed for trading or quoted immediately following such 

  
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event, and if the Registered Holder properly exercises the Warrant within thirty (30) days following the public disclosure of the consummation of such applicable event by the Company
pursuant to a Current Report on Form 8-K filed with the Commission, the Warrant Price shall be reduced by an amount (in dollars) equal to the difference of (i) the Warrant Price in effect prior to such
reduction minus (ii) (A) the Per Share Consideration (as defined below) (but in no event less than zero) minus (B) the Black-Scholes Warrant Value (as defined below). The “Black-Scholes Warrant Value” means the
value of a Warrant immediately prior to the consummation of the applicable event based on the Black-Scholes Warrant Model for a Capped American Call on Bloomberg Financial Markets (“Bloomberg”). For purposes of calculating
such amount, (1) Section 6 of this Agreement shall be taken into account, (2) the price of each share of Common Stock shall be the volume weighted average price of the Common Stock as reported during the ten (10) trading day
period ending on the trading day prior to the effective date of the applicable event, (3) the assumed volatility shall be the 90 day volatility obtained from the HVT function on Bloomberg determined as of the trading day immediately prior to
the day of the announcement of the applicable event, and (4) the assumed risk-free interest rate shall correspond to the U.S. Treasury rate for a period equal to the remaining term of the Warrant. “Per Share
Consideration” means (i) if the consideration paid to holders of the Common Stock consists exclusively of cash, the amount of such cash per share of Common Stock, and (ii) in all other cases, the volume weighted average price
of the Common Stock as reported during the ten (10) trading day period ending on the trading day prior to the effective date of the applicable event. If any reclassification or reorganization also results in a change in shares of Common Stock
covered by subsection 4.1.1, then such adjustment shall be made pursuant to subsection 4.1.1 or Sections 4.2, 4.3 and this Section 4.4. The provisions of this Section 4.4 shall similarly apply
to successive reclassifications, reorganizations, mergers or consolidations, sales or other transfers. In no event will the Warrant Price be reduced to less than the par value per share issuable upon exercise of the Warrant. 

4.5    Notices of Changes in Warrant. Upon every adjustment of the Warrant Price or the number of shares of Common
Stock issuable upon exercise of a Warrant, the Company shall give written notice thereof to the Warrant Agent, which notice shall state the Warrant Price resulting from such adjustment and the increase or decrease, if any, in the number of shares of
Common Stock purchasable at such price upon the exercise of a Warrant, setting forth in reasonable detail the method of calculation and the facts upon which such calculation is based. Upon the occurrence of any event specified in Sections
4.1, 4.2, 4.3 or 4.4, the Company shall give written notice of the occurrence of such event to each holder of a Warrant, at the last address set forth for such holder in the Warrant Register, of the record date or the effective date of the
event. Failure to give such notice, or any defect therein, shall not affect the legality or validity of such event. 

4.6    No Fractional Shares. Notwithstanding any provision contained in this Agreement to the contrary, the Company
shall not issue fractional shares of Common Stock upon the exercise of Warrants. If, by reason of any adjustment made pursuant to this Section 4, the holder of any Warrant would be entitled, upon the exercise of such Warrant, to receive
a fractional interest in a share, the Company shall, upon such exercise, round down to the nearest whole number the number of shares of Common Stock to be issued to such holder. 

  
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 4.7    Form of Warrant. The form of Warrant need not be changed
because of any adjustment pursuant to this Section 4, and Warrants issued after such adjustment may state the same Warrant Price and the same number of shares of Common Stock as is stated in the Warrants initially issued pursuant to this
Agreement; provided, however, that the Company may at any time in its sole discretion make any change in the form of Warrant that the Company may deem appropriate and that does not affect the substance thereof, and any Warrant thereafter issued or
countersigned, whether in exchange or substitution for an outstanding Warrant or otherwise, may be in the form as so changed. 

4.8    Other Events. In case any event shall occur affecting the Company as to which none of the provisions of the
preceding subsections of this Section 4 are strictly applicable, but which would require an adjustment to the terms of the Warrants in order to (i) avoid an adverse impact on the Warrants and (ii) effectuate the intent and
purpose of this Section 4 (including, without limitation, any event which requires an adjustment to the terms of the Public Warrants), then, in each such case, the Company shall appoint a firm of independent public accountants,
investment banking or other appraisal firm of recognized national standing, which shall give its opinion as to whether or not any adjustment to the rights represented by the Warrants is necessary to avoid such adverse impact and/or to effectuate the
intent and purpose of this Section 4 and, if they determine that an adjustment is necessary, the terms of such adjustment (which shall be equivalent to any adjustment to the Public Warrants). The Company shall adjust the terms of the
Warrants in a manner that is consistent with any adjustment recommended in such opinion. 
 5.    Transfer and Exchange of
Warrants. 
 5.1    Registration of Transfer. The Warrant Agent shall register the transfer, from time to
time, of any outstanding Warrant upon the Warrant Register, upon surrender of such Warrant for transfer, properly endorsed with signatures properly guaranteed and accompanied by appropriate instructions for transfer. Upon any such transfer, a new
Warrant representing an equal aggregate number of Warrants shall be issued and the old Warrant shall be cancelled by the Warrant Agent. The Warrants so cancelled shall be delivered by the Warrant Agent to the Company from time to time upon request.

 5.2    Procedure for Surrender of Warrants. Warrants may be surrendered to the Warrant Agent, together with a
written request for exchange or transfer, and thereupon the Warrant Agent shall issue in exchange therefor one or more new Warrants as requested by the Registered Holder of the Warrants so surrendered, representing an equal aggregate number of
Warrants; provided, however, that in the event that a Warrant surrendered for transfer bears a restrictive legend, the Warrant Agent shall not cancel such Warrant and issue new Warrants in exchange thereof until the Warrant Agent has received an
opinion of counsel for the Company stating that such transfer may be made and indicating whether the new Warrants must also bear a restrictive legend. 

5.3    Transfers of Fractions of Warrants. The Warrant Agent shall not be required to effect any registration of
transfer or exchange of Warrants which would require the issuance of a warrant certificate or book-entry position for a fraction of a warrant. 

  
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 5.4    Service Charges. No service charge shall be made for any
exchange or registration of transfer of Warrants. 
 5.5    Accredited Investors. The Warrants may only be
transferred to (i) an “accredited investor” (as defined in Rule 501(a)(1), (a)(2), (a)(3), (a)(7) or (a)(8) under the Securities Act) or (ii) a “qualified institutional buyer” (as defined in Rule 144A(a) under the
Securities Act). 
 5.6    Warrant Execution and Countersignature. The Warrant Agent is hereby authorized to
countersign and to deliver, in accordance with the terms of this Agreement, the Warrants required to be issued pursuant to the provisions of this Section 5, and the Company, whenever required by the Warrant Agent, shall supply the
Warrant Agent with Warrants duly executed on behalf of the Company for such purpose. 
 6.    Redemption. 

6.1    Redemption of Warrants for Cash When the Price Per Share of Common Stock Equals or Exceeds $18.00. Not less
than all of the outstanding Warrants may be redeemed, at the option of the Company, at any time while they are exercisable and prior to their expiration, at the office of the Warrant Agent, upon notice to the Registered Holders of the Warrants, as
described in Section 6.3 below, at a Redemption Price of $0.01 per Warrant, provided that the last sales price of the Common Stock reported has been at least $18.00 per share (subject to adjustment in compliance with
Section 4 hereof), on each of twenty (20) trading days within the thirty (30) trading-day period ending on the third Business Day prior to the date on which notice of the redemption is
given and provided that (i) the Company is contemporaneously taking, or has taken, the same action in respect of all the Public Warrants, and (ii) there is an effective registration statement covering the resale by the Registered Holder of
all of the shares of Common Stock issuable upon exercise of the Warrants, and a current prospectus relating thereto, available throughout the 30-day Redemption Period (as defined in Section 6.3
below). 
 6.2    Redemption of Warrants When the Price Per Share of Common Stock Equals or Exceeds $10.00. Not
less than all of the outstanding Warrants may be redeemed, at the option of the Company, at any time while they are exercisable and prior to their expiration, at the office of the Warrant Agent, upon notice to the Registered Holders of the Warrants,
as described in Section 6.3 below, at a Redemption Price of $0.10 per Warrant, provided that the last sale price of the Common Stock equals or exceeds $10.00 per share (subject to adjustment in compliance with Section 4
hereof), on the trading day prior to the date on which notice of the redemption is given . During the 30-day Redemption Period (as defined in Section 6.3 below) in connection with a redemption pursuant to
this Section 6.2, Registered Holders of the Warrants may elect to exercise their Warrants on a “cashless basis” pursuant to subsection 3.3.1 and receive a number of shares of Common Stock determined by reference to the
table set forth in Section 6.2 of the Warrant Agreement, dated October 19, 2020, by and between the Company and the Warrant Agent (the “Table”), as equitably adjusted to reflect the Exercise Price of the Warrants as
compared to the exercise price of the Public Warrants, based on the Redemption Date (as defined below) and the “Redemption Fair Market Value” (as such term is defined in this Section 6.2) (a “Make-Whole
Exercise”). Solely for purposes of this Section 6.2, the “Redemption Fair Market Value” shall mean the average reported last sale price of the Common Stock for the ten trading days immediately following the date on
which notice of redemption pursuant to this Section 6.2 

  
 -10- 

 
is sent to the Registered Holders. In connection with any redemption pursuant to this Section 6.2, the Company shall provide the Registered Holders with the Redemption Fair Market
Value no later than one Business Day after the ten trading day period described in the definition of “Redemption Fair Market Value” above ends. 

If the exact Redemption Fair Market Value and Redemption Date (as defined below) are between two values in the Table or the Redemption Date is
between two redemption dates in the Table, the number of shares of Common Stock to be issued for each Warrant exercised in a Make-Whole Exercise shall be determined by a straight-line interpolation between the number of shares set forth for the
higher and lower Redemption Fair Market Values and the earlier and later redemption dates, as applicable, based on a 365-day year. 

The stock prices set forth in the column headings of the Table shall be adjusted as of any date on which the number of shares issuable upon
exercise of a Warrant is adjusted pursuant to Section 4. The adjusted stock prices in the column headings shall equal the stock prices immediately prior to such adjustment, multiplied by a fraction, the numerator of which is the number
of shares deliverable upon exercise of a Warrant immediately prior to such adjustment and the denominator of which is the number of shares deliverable upon exercise of a Warrant as so adjusted. The number of shares in the Table shall be adjusted in
the same manner and at the same time as the number of shares issuable upon exercise of a Warrant. 
 In no event shall the Warrants be
exercisable in connection with a Make-Whole Exercise for more than 0.361 shares of Common Stock per whole warrant (as equitably adjusted to reflect the Exercise Price of the Warrants as compared to the exercise price of the Public Warrants and
subject to further adjustment). 
 6.3    Date Fixed for, and Notice of, Redemption; Redemption Price. In the
event that the Company elects to redeem the Warrants pursuant to Sections 6.1 or 6.2 hereof, the Company shall fix a date for the redemption (the “Redemption Date”). Notice of redemption shall be mailed by first
class mail, postage prepaid, by the Company not less than thirty (30) days prior to the Redemption Date (the “30-day Redemption Period”) to the Registered Holders of the Warrants
to be redeemed at their last addresses as they shall appear on the registration books. Any notice mailed in the manner herein provided shall be conclusively presumed to have been duly given whether or not the Registered Holder received such notice.
As used in this Agreement, “Redemption Price” shall mean the price per Warrant at which any Warrants are redeemed pursuant to Sections 6.1 or 6.2 hereof. 

6.4    Exercise After Notice of Redemption. The Warrants may be exercised for cash (or, if in connection with a
redemption pursuant to Section 6.2 hereof, on a “cashless basis” in accordance with such section) at any time after notice of redemption shall have been given by the Company pursuant to Section 6.3 hereof and prior
to the Redemption Date. On and after the Redemption Date, the Registered Holder of the Warrants shall have no further rights hereunder except to receive, upon surrender of the Warrants, the Redemption Price, or to receive any shares of Common Stock
issuable in respect of any exercises of the Warrants effected prior to the Redemption Date, as applicable. 

  
 -11- 

 7.    Other Provisions Relating to Rights of Holders of Warrants. 

7.1    No Rights as Stockholder. A Warrant does not entitle the Registered Holder thereof to any of the rights of
stockholders of the Company, including, without limitation, the right to receive dividends, or other distributions, exercise any preemptive rights to vote or to consent or to receive notice as a stockholder in respect of the meetings of stockholders
or the election of directors of the Company or any other matter. 
 7.2    Lost, Stolen, Mutilated, or Destroyed
Warrants. If any Warrant is lost, stolen, mutilated, or destroyed, the Company and the Warrant Agent may on such terms as to indemnity or otherwise as they may in their discretion impose (which shall, in the case of a mutilated Warrant, include
the surrender thereof), issue a new Warrant of like denomination, tenor, and date as the Warrant so lost, stolen, mutilated, or destroyed. Any such new Warrant shall constitute a substitute contractual obligation of the Company, whether or not the
allegedly lost, stolen, mutilated, or destroyed Warrant shall be at any time enforceable by anyone. 

7.3    Reservation of Common Stock. The Company shall at all times reserve and keep available a number of its
authorized but unissued shares of Common Stock that shall be sufficient to permit the exercise in full of all outstanding Warrants issued pursuant to this Agreement. 

7.4    Registration of Common Stock; Cashless Exercise at Company’s Option. 

7.4.1    Registration of the Common Stock. The Company agrees that as soon as practicable, but in no event later
than fifteen (15) Business Days after the closing of its initial Business Combination, it shall use its best efforts to file with the Commission a registration statement for the registration, under the Securities Act, of the resale of the
shares of Common Stock issuable upon exercise of the Warrants. The Company shall use its best efforts to cause the same to become effective and to maintain the effectiveness of such registration statement, and a current prospectus relating thereto,
until the expiration of the Warrants in accordance with the provisions of this Agreement. 
 7.4.2    Cashless
Exercise at Company’s Option. If the Common Stock is at the time of any exercise of a Warrant not listed on a national securities exchange such that it satisfies the definition of a “covered security” under Section 18(b)(1)
of the Securities Act (or any successor statute), the Company may, at its option, (i) require holders of Warrants who exercise Warrants to exercise such Warrants on a “cashless basis” in accordance with Section 3(a)(9) of the
Securities Act (or any successor statute) as described in subsection 3.3.1(b) and (ii) in the event the Company so elects, the Company shall (x) not be required to file or maintain in effect a registration statement for the
registration, under the Securities Act, of the Common Stock issuable upon exercise of the Warrants, notwithstanding anything in this Agreement to the contrary, and (y) use its best efforts to register or qualify the Common Stock issuable upon
exercise of the Warrant under the blue sky laws of the state of residence of the exercising Warrant holder to the extent an exemption is not available. 

8.    Concerning the Warrant Agent and Other Matters. 

8.1    Payment of Taxes. The Company shall from time to time promptly pay all taxes and charges that may be imposed
upon the Company or the Warrant Agent in respect of the 

  
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issuance or delivery of shares of Common Stock upon the exercise of the Warrants, but the Company shall not be obligated to pay any transfer taxes in respect of the Warrants or such shares of
Common Stock. 
 8.2    Resignation, Consolidation, or Merger of Warrant Agent. 

8.2.1    Appointment of Successor Warrant Agent. The Warrant Agent, or any successor to it hereafter appointed, may
resign its duties and be discharged from all further duties and liabilities hereunder after giving sixty (60) days’ notice in writing to the Company. If the office of the Warrant Agent becomes vacant by resignation or incapacity to act or
otherwise, the Company shall appoint in writing a successor Warrant Agent in place of the Warrant Agent. If the Company shall fail to make such appointment within a period of thirty (30) days after it has been notified in writing of such
resignation or incapacity by the Warrant Agent or by the holder of a Warrant (who shall, with such notice, submit his, her or its Warrant for inspection by the Company), then the holder of any Warrant may apply to the Supreme Court of the State of
New York for the County of New York for the appointment of a successor Warrant Agent at the Company’s cost. Any successor Warrant Agent, whether appointed by the Company or by such court, shall be a corporation organized and existing under the
laws of the State of New York, in good standing and having its principal office in the Borough of Manhattan, City and State of New York, and authorized under such laws to exercise corporate trust powers and subject to supervision or examination by
federal or state authority. After appointment, any successor Warrant Agent shall be vested with all the authority, powers, rights, immunities, duties, and obligations of its predecessor Warrant Agent with like effect as if originally named as
Warrant Agent hereunder, without any further act or deed; but if for any reason it becomes necessary or appropriate, the predecessor Warrant Agent shall execute and deliver, at the expense of the Company, an instrument transferring to such successor
Warrant Agent all the authority, powers, and rights of such predecessor Warrant Agent hereunder; and upon request of any successor Warrant Agent the Company shall make, execute, acknowledge, and deliver any and all instruments in writing for more
fully and effectually vesting in and confirming to such successor Warrant Agent all such authority, powers, rights, immunities, duties, and obligations. 

8.2.2    Notice of Successor Warrant Agent. In the event a successor Warrant Agent shall be appointed, the Company
shall give notice thereof to the predecessor Warrant Agent and the Transfer Agent for the Common Stock not later than the effective date of any such appointment. 

8.2.3    Merger or Consolidation of Warrant Agent. Any corporation into which the Warrant Agent may be merged or
with which it may be consolidated or any corporation resulting from any merger or consolidation to which the Warrant Agent shall be a party shall be the successor Warrant Agent under this Agreement without any further act. 

8.3    Fees and Expenses of Warrant Agent. 

8.3.1    Remuneration. The Company agrees to pay the Warrant Agent reasonable remuneration for its services as such
Warrant Agent hereunder and shall, pursuant to its obligations under this Agreement, reimburse the Warrant Agent upon demand for all expenditures that the Warrant Agent may reasonably incur in the execution of its duties hereunder. 

  
 -13- 

 8.3.2    Further Assurances. The Company agrees to perform,
execute, acknowledge, and deliver or cause to be performed, executed, acknowledged, and delivered all such further and other acts, instruments, and assurances as may reasonably be required by the Warrant Agent for the carrying out or performing of
the provisions of this Agreement. 
 8.4    Liability of Warrant Agent. 

8.4.1    Reliance on Company Statement. Whenever in the performance of its duties under this Agreement, the Warrant
Agent shall deem it necessary or desirable that any fact or matter be proved or established by the Company prior to taking or suffering any action hereunder, such fact or matter (unless other evidence in respect thereof be herein specifically
prescribed) may be deemed to be conclusively proved and established by a statement signed by the Chief Executive Officer, Chief Financial Officer, Secretary or Chairman of the Board of the Company and delivered to the Warrant Agent. The Warrant
Agent may rely upon such statement for any action taken or suffered in good faith by it pursuant to the provisions of this Agreement. 

8.4.2    Indemnity. The Warrant Agent shall be liable hereunder only for its own gross negligence, willful
misconduct or bad faith. The Company agrees to indemnify the Warrant Agent and save it harmless against any and all liabilities, including judgments, costs and reasonable counsel fees, for anything done or omitted by the Warrant Agent in the
execution of this Agreement, except as a result of the Warrant Agent’s gross negligence, willful misconduct or bad faith. 

8.4.3    Exclusions. The Warrant Agent shall have no responsibility with respect to the validity of this Agreement
or with respect to the validity or execution of any Warrant (except its countersignature thereof). The Warrant Agent shall not be responsible for any breach by the Company of any covenant or condition contained in this Agreement or in any Warrant.
The Warrant Agent shall not be responsible to make any adjustments required under the provisions of Section 4 hereof or responsible for the manner, method, or amount of any such adjustment or the ascertaining of the existence of facts
that would require any such adjustment; nor shall it by any act hereunder be deemed to make any representation or warranty as to the authorization or reservation of any shares of Common Stock to be issued pursuant to this Agreement or any Warrant or
as to whether any shares of Common Stock shall, when issued, be valid and fully paid and non-assessable. 

8.5    Acceptance of Agency. The Warrant Agent hereby accepts the agency established by this Agreement and agrees
to perform the same upon the terms and conditions herein set forth and among other things, shall account promptly to the Company with respect to Warrants exercised and concurrently account for, and pay to the Company, all monies received by the
Warrant Agent for the purchase of shares of Common Stock through the exercise of the Warrants. 

  
 -14- 

 8.6    Waiver. The Warrant Agent has no right of set-off or any other right, title, interest or claim of any kind (“Claim”) in, or to any distribution of, the Trust Account (as defined in that certain Investment Management Trust Agreement,
dated as of the date hereof, by and between the Company and the Warrant Agent as trustee thereunder) and hereby agrees not to seek recourse, reimbursement, payment or satisfaction for any Claim against the Trust Account for any reason whatsoever.
The Warrant Agent hereby waives any and all Claims against the Trust Account and any and all rights to seek access to the Trust Account. 

9.    Miscellaneous Provisions. 

9.1    Successors. All the covenants and provisions of this Agreement by or for the benefit of the Company or the
Warrant Agent or the holders of the Warrants shall bind and inure to the benefit of their respective successors and assigns. 

9.2    Notices. Any notice, statement or demand authorized by this Agreement to be given or made by the Warrant
Agent or by the holder of any Warrant to or on the Company shall be sufficiently given when so delivered if by hand or overnight delivery or if sent by certified mail or private courier service within five (5) days after deposit of such notice,
postage prepaid, addressed (until another address is filed in writing by the Company with the Warrant Agent), as follows: 
 Hyzon Motors
Inc. 
 85 East Street 
 Honeoye
Falls, NY 14472 
 Attention: Craig Knight, George Gu 

Email: craig.knight@hyzonmotors.com, gg@hyzonmotors.com 

Any notice, statement or demand authorized by this Agreement to be given or made by the holder of any Warrant or by the Company to or on the
Warrant Agent shall be sufficiently given when so delivered if by hand or overnight delivery or if sent by certified mail or private courier service within five (5) days after deposit of such notice, postage prepaid, addressed (until another
address is filed in writing by the Warrant Agent with the Company), as follows: 
 Continental Stock Transfer & Trust Company 

1 State Street, 30th Floor 
 New
York, New York 10004 
 Attn: Compliance Department 

Email: compliance@continentalstock.com 

Notwithstanding the foregoing, any subscription form may be delivered by a Registered Holder or its securities broker or intermediary via facsimile or
electronic mail as provided herein. 
 9.3    Applicable Law. The validity, interpretation, and performance of
this Agreement and of the Warrants shall be governed in all respects by the laws of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. The
Company hereby agrees that any action, proceeding or claim against it arising out of or relating in any way to this Agreement shall be brought and enforced in the courts of the State of New York or the United States District Court for the Southern
District of New York, and irrevocably submits to such jurisdiction, which jurisdiction shall be exclusive. The Company hereby waives any objection to such exclusive jurisdiction and that such courts represent an inconvenient forum. 

  
 -15- 

 9.4    Persons Having Rights under this Agreement. Nothing in
this Agreement shall be construed to confer upon, or give to, any person or corporation other than the parties hereto and the Registered Holders of the Warrants any right, remedy, or claim under or by reason of this Agreement or of any covenant,
condition, stipulation, promise, or agreement hereof. All covenants, conditions, stipulations, promises, and agreements contained in this Agreement shall be for the sole and exclusive benefit of the parties hereto and their successors and assigns
and of the Registered Holders of the Warrants. 
 9.5    Examination of the Warrant Agreement. A copy of this
Agreement shall be available at all reasonable times at the office of the Warrant Agent in the Borough of Manhattan, City and State of New York, for inspection by the Registered Holder of any Warrant. The Warrant Agent may require any such holder to
submit such holder’s Warrant for inspection by the Warrant Agent. 
 9.6    Counterparts. This Agreement may
be executed in any number of original or facsimile counterparts and each of such counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument. 

9.7    Effect of Headings. The section headings herein are for convenience only and are not part of this Agreement
and shall not affect the interpretation thereof. 
 9.8    Amendments. This Agreement may be amended by the
parties hereto without the consent of any Registered Holder for the purpose of curing any ambiguity, or curing, correcting or supplementing any defective provision contained herein or adding or changing any other provisions with respect to matters
or questions arising under this Agreement as the parties may deem necessary or desirable and that the parties deem shall not adversely affect the interest of the Registered Holders. All other modifications or amendments, including any amendment to
increase the Warrant Price or shorten the Exercise Period and any amendment to the terms of the Warrants, shall require the vote or written consent of the Registered Holders of 50% of the then outstanding Warrants. Notwithstanding the foregoing, the
Company may lower the Warrant Price or extend the duration of the Exercise Period pursuant to Sections 3.1 and 3.2, respectively, without the consent of the Registered Holders. Notwithstanding the foregoing or anything to the contrary contained
elsewhere herein, in the event that any of the Public Warrants (or the agreements in respect thereof) are directly or indirectly amended, modified or waived in a manner that favorably affects, or is otherwise beneficial to, any holder of any of the
Public Warrants (by reducing the exercise price of such Public Warrants, or otherwise) and would be favorable to, or otherwise, benefit the Registered Holders of the Warrants, each Registered Holder of the Warrants shall be afforded the benefits of
such amendment, modification or waiver on an equivalent basis, and this Agreement and the Warrants shall be deemed amended to give effect thereto. 

9.9    Severability. This Agreement shall be deemed severable, and the invalidity or unenforceability of any term
or provision hereof shall not affect the validity or enforceability of this Agreement or of any other term or provision hereof. Furthermore, in lieu of any such invalid 

  
 -16- 

 
or unenforceable term or provision, the parties hereto intend that there shall be added as a part of this Agreement a provision as similar in terms to such invalid or unenforceable provision as
may be possible and be valid and enforceable. 
 Exhibit A — Form of Warrant Certificate 

  
 -17- 

 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of
the date first above written. 
  

					
	DECARBONIZATION PLUS ACQUISITION CORPORATION
		
	By:	 	 /s/ Peter Haskopoulos

		 	Name:	 	Peter Haskopoulos
		 	Title:	 	Chief Financial Officer, Chief Accounting Officer and Secretary
	
	CONTINENTAL STOCK TRANSFER & TRUST COMPANY, as Warrant Agent
		
	By:	 	  

		 	Name:	 	
		 	Title:	 	

 [Signature Page to Warrant Agreement] 

 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of
the date first above written. 
  

			
	DECARBONIZATION PLUS ACQUISITION CORPORATION
		
	By:	 	
		 	Name: Peter Haskopoulos
		 	Title: Chief Financial Officer, Chief Accounting             Officer and Secretary
	
	CONTINENTAL STOCK TRANSFER & TRUST COMPANY, as Warrant Agent
		
	By:	 	 /s/ Stacy Aqui

		 	Name: Stacy Aqui
		 	Title: Vice President

 [Signature Page to Warrant Agreement] 

 EXHIBIT A 

[Form of Warrant Certificate] 

[FACE] 
 Number 

Warrants 
  

 
 THIS WARRANT
SHALL BE VOID IF NOT EXERCISED PRIOR TO 
 THE EXPIRATION OF THE EXERCISE PERIOD PROVIDED FOR 

IN THE WARRANT AGREEMENT DESCRIBED BELOW 

DECARBONIZATION PLUS ACQUISITION CORPORATION 

Incorporated Under the Laws of the State of Delaware 

CUSIP 
 Warrant Certificate

 THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY STATE
SECURITIES LAWS, AND MAY NOT BE OFFERED, SOLD, TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND ANY APPLICABLE STATE SECURITIES LAWS OR AN EXEMPTION FROM REGISTRATION IS AVAILABLE.
NOTWITHSTANDING THE FOREGOING, THE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN OR FINANCING ARRANGEMENT SECURED BY THE SECURITIES. 

This Warrant Certificate certifies
that                , or registered assigns, is the registered holder of warrant(s) evidenced hereby (the
“Warrants” and each, a “Warrant”) to purchase shares of Class A common stock, $0.0001 par value per share (“Common Stock”), of Decarbonization Plus Acquisition Corporation,
a Delaware corporation (the “Company”). Each Warrant entitles the holder, upon exercise during the period set forth in the Warrant Agreement referred to below, to receive from the Company that number of fully paid and non-assessable shares of Common Stock as set forth below, at the exercise price (the “Exercise Price”) as determined pursuant to the Warrant Agreement, payable in lawful money of the United
States of America upon surrender of this Warrant Certificate and payment of the Exercise Price at the office or agency of the Warrant Agent referred to below, subject to the conditions set forth herein and in the Warrant Agreement. Defined terms
used in this Warrant Certificate but not defined herein shall have the meanings given to them in the Warrant Agreement. 
 Each Warrant is
initially exercisable for one fully paid and non-assessable share of Common Stock. The number of shares of Common Stock issuable upon exercise of the Warrants is subject to adjustment upon the occurrence of
certain events set forth in the Warrant Agreement. 

 The initial Exercise Price per share of Common Stock for any Warrant is equal to $2.20 per
share. The Exercise Price is subject to adjustment upon the occurrence of certain events set forth in the Warrant Agreement. 
 Subject to
the conditions set forth in the Warrant Agreement, the Warrants may be exercised only during the Exercise Period and to the extent not exercised by the end of such Exercise Period, such Warrants shall become void. 

Reference is hereby made to the further provisions of this Warrant Certificate set forth on the reverse hereof and such further provisions
shall for all purposes have the same effect as though fully set forth at this place. 
 This Warrant Certificate shall not be valid unless
countersigned by the Warrant Agent, as such term is used in the Warrant Agreement. 
 This Warrant Certificate shall be governed by and
construed in accordance with the internal laws of the State of New York, without regard to conflicts of laws principles thereof. 
  

			
	DECARBONIZATION PLUS ACQUISITION CORPORATION

 
			
		
	By:	 	  

		 	Name:
		 	Title:
	
	CONTINENTAL STOCK TRANSFER & TRUST COMPANY, as Warrant Agent

 
			
		
	By:	 	  

		 	Name:
		 	Title:

 [Form of Warrant Certificate] 

[Reverse] 
 The Warrants
evidenced by this Warrant Certificate are part of a duly authorized issue of Warrants entitling the holder on exercise to receive shares of Common Stock and are issued or to be issued pursuant to a Warrant Agreement dated as of July 16, 2021
(the “Warrant Agreement”), duly executed and delivered by the Company to Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (the “ Warrant Agent”), which
Warrant Agreement is hereby incorporated by reference in and made a part of this instrument and is hereby referred to for a description of the rights, limitation of rights, obligations, duties and immunities thereunder of the Warrant Agent, the
Company and the holders (the words “holders” or “holder” meaning the Registered Holders or Registered Holder) of the Warrants. A copy of the Warrant Agreement may be obtained by the holder hereof upon
written request to the Company. Defined terms used in this Warrant Certificate but not defined herein shall have the meanings given to them in the Warrant Agreement. 

Warrants may be exercised at any time during the Exercise Period set forth in the Warrant Agreement. The holder of Warrants evidenced by this
Warrant Certificate may exercise them by surrendering this Warrant Certificate, with the form of election to purchase set forth hereon properly completed and executed, together with payment of the Exercise Price as specified in the Warrant
Agreement(or through “cashless exercise” as provided for in the Warrant Agreement) at the principal corporate trust office of the Warrant Agent. In the event that upon any exercise of Warrants evidenced hereby the number of
Warrants exercised shall be less than the total number of Warrants evidenced hereby, there shall be issued to the holder hereof or his, her or its assignee, a new Warrant Certificate evidencing the number of Warrants not exercised. 

The Warrant Agreement provides that upon the occurrence of certain events the number of shares of Common Stock issuable upon exercise of the
Warrants set forth on the face hereof may, subject to certain conditions, be adjusted. If, upon exercise of a Warrant, the holder thereof would be entitled to receive a fractional interest in a share of Common Stock, the Company shall, upon
exercise, round down to the nearest whole number of shares of Common Stock to be issued to the holder of the Warrant. 
 Warrant
Certificates, when surrendered at the principal corporate trust office of the Warrant Agent by the Registered Holder thereof in person or by legal representative or attorney duly authorized in writing, may be exchanged, in the manner and subject to
the limitations provided in the Warrant Agreement, but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor evidencing in the aggregate a like number of Warrants. 

Upon due presentation for registration of transfer of this Warrant Certificate at the office of the Warrant Agent a new Warrant Certificate or
Warrant Certificates of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to the transferee(s) in exchange for this Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without charge
except for any tax or other governmental charge imposed in connection therewith. 

 The Company and the Warrant Agent may deem and treat the Registered Holder(s) hereof as the
absolute owner(s) of this Warrant Certificate (notwithstanding any notation of ownership or other writing hereon made by anyone), for the purpose of any exercise hereof, of any distribution to the holder(s) hereof, and for all other purposes, and
neither the Company nor the Warrant Agent shall be affected by any notice to the contrary. 
 Neither the Warrants nor this Warrant
Certificate entitles any holder hereof to any rights of a stockholder of the Company. 

 Election to Purchase 

(To Be Executed Upon Exercise of Warrant) 

The undersigned hereby irrevocably elects to exercise the right, represented by this Warrant Certificate, to receive
                     shares of Common Stock and herewith tenders payment for such shares of Common Stock to the order of Decarbonization Plus
Acquisition Corporation (the “Company”) in the amount of $                     in accordance with the terms hereof. The
undersigned requests that a certificate for such shares of Common Stock be registered in the name of                     , whose address is
                     and that such shares of Common Stock be delivered to whose address is
                    . If said number of shares of Common Stock is less than all of the shares of Common Stock purchasable hereunder, the
undersigned requests that a new Warrant Certificate representing the remaining balance of such shares of Common Stock be registered in the name of , whose address is and that such Warrant Certificate be delivered to
                    , whose address is
                    . 
 In the
event that the Warrant has been called for redemption by the Company pursuant to Section 6.2 of the Warrant Agreement and a holder thereof elects to exercise its Warrant pursuant to a Make-Whole Exercise, the number of shares of Common
Stock that this Warrant is exercisable for shall be determined in accordance with subsection 3.3.1(c) or Section 6.2 of the Warrant Agreement, as applicable. 

In the event that the Warrant is to be exercised on a “cashless” basis pursuant to Section 7.4 of the Warrant Agreement,
the number of shares of Common Stock that this Warrant is exercisable for shall be determined in accordance with Section 7.4 of the Warrant Agreement. 

In the event that the Warrant may be exercised, to the extent allowed by the Warrant Agreement, through cashless exercise (i) the number
of shares of Common Stock that this Warrant is exercisable for would be determined in accordance with the relevant section of the Warrant Agreement which allows for such cashless exercise and (ii) the holder hereof shall complete the following:
The undersigned hereby irrevocably elects to exercise the right, represented by this Warrant Certificate, through the cashless exercise provisions of the Warrant Agreement, to receive shares of Common Stock. If said number of shares is less than all
of the shares of Common Stock purchasable hereunder (after giving effect to the cashless exercise), the undersigned requests that a new Warrant Certificate representing the remaining balance of such shares of Common Stock be registered in the name
of                     , whose address is
                     and that such Warrant Certificate be delivered to
                    , whose address is
                    . 

[Signature Page Follows] 

 Date:
                    , 20 
  

	
	  

	(Signature)
	
	  

	(Address)
	
	  

	(Tax Identification Number)

  

	
	Signature Guaranteed:EX-10.5

 Exhibit 10.5 

Execution Version 

AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT 

THIS AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of July 16, 2021, is made
and entered into by and among Decarbonization Plus Acquisition Corporation, a Delaware corporation (the “Company”), Decarbonization Plus Acquisition Sponsor, LLC, a Delaware limited liability company (the
“Sponsor”), and the undersigned parties listed under Holder on the signature pages hereto (each such party, together with the Sponsor and any person or entity who hereafter becomes a party to this Agreement pursuant to
Section 5.2 of this Agreement, a “Holder” and collectively, the “Holders”). 

RECITALS 
 WHEREAS,
on October 19, 2020, the Company, the Sponsor and certain other security holders named therein (the “Existing Holders”) entered into that certain Registration Rights Agreement (the “Existing Registration
Rights Agreement”), pursuant to which the Company granted the Sponsor and such other Existing Holders certain registration rights with respect to certain securities of the Company; 

WHEREAS, on February 8, 2021, the Company, DCRB Merger Sub Inc., a Delaware corporation and wholly owned subsidiary of the Company
(“Merger Sub”), and Hyzon Motors Inc., a Delaware corporation (“Hyzon”), entered into that certain Business Combination Agreement and Plan of Reorganization (the
“BCA”), pursuant to which, among other things, Merger Sub will merge with and into Hyzon on or about the date hereof, with Hyzon surviving the merger as a wholly owned subsidiary of the Company (the “Business
Combination”); 
 WHEREAS, after the closing of the Business Combination, the Holders will own shares of the
Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”), and the Sponsor, WRG DCRB Investors, LLC, James AC McDermott, Jeffrey Tepper, Dr. Jennifer Aaker, and Jane Kearns
will own warrants to purchase 6,514,500 shares of Common Stock (the “Private Placement Warrants”); and 

WHEREAS, the Company and the Existing Holders desire to amend and restate the Existing Registration Rights Agreement, pursuant to which
the Company shall grant the Holders certain registration rights with respect to certain securities of the Company, as set forth in this Agreement. 

NOW, THEREFORE, in consideration of the representations, covenants and agreements contained herein, and certain other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound, hereby agree as follows: 

ARTICLE I 
 DEFINITIONS

 1.1.    Definitions. The terms defined in this Article I shall, for all purposes of this Agreement,
have the respective meanings set forth below: 
 “Agreement” shall have the meaning given in the Preamble. 

“BCA” shall have the meaning given in the Recitals hereto. 

“Board” shall mean the board of directors of the Company. 

“Business Combination” shall have the meaning given in the Recitals hereto. 

“Commission” shall mean the Securities and Exchange Commission. 

“Common Stock” shall have the meaning given in the Recitals hereto. 

“Company” shall have the meaning given in the Preamble. 

 “Demanding Holder” shall mean any Holder or group of Holders that
together elects to dispose of Registrable Securities having an aggregate value of at least $25 million, at the time of the Underwritten Demand, under a Registration Statement pursuant to an Underwritten Offering. 

“Effectiveness Period” shall have the meaning given in subsection 3.1.1 of this Agreement. 

“Exchange Act” shall mean the Securities Exchange Act of 1934, as it may be amended from time to time. 

“Existing Holders” shall have the meaning given in the Recitals hereto. 

“Existing Registration Rights Agreement” shall have the meaning given in the Recitals hereto. 

“Form S-3” shall mean a Registration Statement on Form S-3 or any similar short-form registration statement that may be available at such time. 

“Holder Indemnified Persons” shall have the meaning given in subsection 4.1.1 of this Agreement. 

“Holders” shall have the meaning given in the Preamble. 

“Hyzon” shall have the meaning given in the Recitals hereto. 

“Maximum Number of Securities” shall have the meaning given in subsection 2.1.3 of this Agreement. 

“Merger Sub” shall have the meaning given in the Recitals hereto. 

“Misstatement” shall mean an untrue statement of a material fact or an omission to state a material fact required to
be stated in a Registration Statement or Prospectus, or necessary to make the statements in a Registration Statement or Prospectus (in the light of the circumstances under which they were made) not misleading. 

“Piggyback Registration” shall have the meaning given in subsection 2.2.1 of this Agreement. 

“Private Placement Warrants” shall have the meaning given in the Recitals hereto. 

“Pro Rata” shall have the meaning given in subsection 2.1.3 of this Agreement. 

“Prospectus” shall mean the prospectus included in any Registration Statement, as supplemented by any and all
prospectus supplements and as amended by any and all post-effective amendments and including all material incorporated by reference in such prospectus. 

“Registrable Security” shall mean (a) the Private Placement Warrants (including any shares of Common Stock issued
or issuable upon the exercise of any such Private Placement Warrants), (b) any outstanding shares of Common Stock held by a Holder as of the date of this Agreement (including any shares of Common Stock issued or issuable upon exercise of any other
outstanding equity securities of the Company (other than equity securities issued pursuant to an employee stock option or other benefit plan) held by a Holder as of the date of this Agreement), (c) any shares of Common Stock issued to a Holder after
the date of this Agreement pursuant to the terms of the BCA, (d) any equity securities (including the shares of Common Stock issued or issuable upon the exercise of any such equity security) of the Company issuable upon conversion of any
working capital loans in an amount up to $1,500,000 made to the Company by a Holder and (e) any other equity security of the Company issued or issuable with respect to any such shares of Common Stock by way of a stock dividend or stock split or
in connection with a combination of shares, recapitalization, merger, consolidation or reorganization; provided, however, that, as to any particular Registrable Securities, such securities shall cease to be Registrable Securities when:
(A) a Registration Statement with respect to the sale of such securities shall have become effective under the Securities Act and such securities shall have been sold, transferred, disposed of or exchanged in accordance with such Registration
Statement; (B) such securities shall have been otherwise transferred, new certificates for such securities not bearing a legend restricting further transfer shall have been delivered by the Company and subsequent public distribution of 

  
 2 

 
such securities shall not require registration under the Securities Act; (C) such securities shall have ceased to be outstanding; or (D) such securities may be sold without registration
pursuant to Rule 144 promulgated under the Securities Act (or any successor rule promulgated thereafter by the Commission) (but with no volume or other restrictions or limitations). 

“Registration” shall mean a registration effected by preparing and filing a registration statement or similar document
in compliance with the requirements of the Securities Act, and the applicable rules and regulations promulgated thereunder, and any such registration statement having been declared effective by, or become effective pursuant to rules promulgated by,
the Commission. 
 “Registration Expenses” shall mean the out-of-pocket expenses of a Registration, including, without limitation, the following: 

(A)    all registration and filing fees (including fees with respect to filings required to be made with the Financial
Industry Regulatory Authority and any securities exchange on which the Common Stock is then listed); 
 (B)    fees and
expenses of compliance with securities or blue sky laws (including reasonable fees and disbursements of counsel for the Underwriters in connection with blue sky qualifications of Registrable Securities); 

(C)    printing, messenger, telephone and delivery expenses; 

(D)    reasonable fees and disbursements of counsel for the Company; 

(E)    reasonable fees and disbursements of all independent registered public accountants of the Company incurred
specifically in connection with such Registration; and 
 (F)    reasonable fees and expenses of one (1) legal
counsel selected by the majority-in-interest of Registrable Securities held by the Demanding Holders initiating an Underwritten Demand to be registered for offer and
sale in the applicable Underwritten Offering, not to exceed $50,000. 
 “Registration Statement” shall mean any
registration statement under the Securities Act that covers the Registrable Securities pursuant to the provisions of this Agreement, including the Prospectus included in such registration statement, amendments (including post-effective amendments)
and supplements to such registration statement, and all exhibits to and all material incorporated by reference in such registration statement. 

“Requesting Holder” shall have the meaning given in subsection 2.1.2 of this Agreement. 

“Securities Act” shall mean the Securities Act of 1933, as amended from time to time. 

“Sponsor” shall have the meaning given in the Preamble. 

“Suspension Event” shall have the meaning given in Section 3.4 of this Agreement. 

“Underwriter” shall mean a securities dealer who purchases any Registrable Securities as principal in an Underwritten
Offering and not as part of such dealer’s market-making activities. 
 “Underwritten Demand” shall have the
meaning given in subsection 2.1.2 of this Agreement. 
 “Underwritten Offering” shall mean a Registration in
which securities of the Company are sold to an Underwriter in a firm commitment underwriting for distribution to the public. 

  
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 ARTICLE II 

REGISTRATIONS 

2.1.    Registration. 

2.1.1    Registration Statement. The Company agrees that, within fifteen (15) business days after the
consummation of the Business Combination, the Company will file with the Commission (at the Company’s sole cost and expense) a Registration Statement registering the resale of all Registrable Securities permitted to be registered for resale
from time to time pursuant to Rule 415 on a Registration Statement on Form S-1. The Company shall use its commercially reasonable efforts to cause such Registration Statement to become effective as soon as
reasonably practicable after the initial filing of the Registration Statement in accordance with Section 3.1 of this Agreement. 

2.1.2    Underwritten Offering. Subject to the provisions of subsection 2.1.3 and Section 2.3 of
this Agreement, any Demanding Holder may make a written demand to the Company for an Underwritten Offering pursuant to a Registration Statement filed with the Commission in accordance with Section 2.1.1 of this Agreement or a new
Registration Statement if such Demanding Holders’ Registrable Securities are not then registered by a Registration Statement filed with the Commission in accordance with subsection 2.1.1 or permitted to be offered in an Underwritten
Offering pursuant to a Registration Statement filed with the Commission in accordance with subsection 2.1.1 (an “Underwritten Demand”). The Company shall, within ten (10) days of the Company’s receipt of the
Underwritten Demand, notify, in writing, all other Holders of such demand, and each Holder who thereafter wishes to include all or a portion of such Holder’s Registrable Securities in such Underwritten Offering pursuant to an Underwritten
Demand (each such Holder that includes all or a portion of such Holder’s Registrable Securities in such Underwritten Offering, a “Requesting Holder”) shall so notify the Company, in writing, within five (5) days
after the receipt by the Holder of the notice from the Company. Upon receipt by the Company of any such written notification from a Requesting Holder(s), such Requesting Holder(s) shall be entitled to have their Registrable Securities included in
the Underwritten Offering pursuant to an Underwritten Demand. All such Holders proposing to distribute their Registrable Securities through an Underwritten Offering under this subsection 2.1.2 shall enter into an underwriting agreement in
customary form with the Underwriter(s) selected for such Underwritten Offering by the Company in consultation with the Demanding Holders initiating the Underwritten Offering. Notwithstanding the foregoing, the Company is not obligated to effect
(i) more than an aggregate of three (3) Underwritten Offerings pursuant to this subsection 2.1.2 in any twelve (12)-month period, (ii) more than an aggregate of four (4) Underwritten Offerings pursuant to this section
2.1.3 in total, (iii) an Underwritten Offering pursuant to this subsection 2.1.2 within ninety (90) days after the closing of an Underwritten Offering or (iv) an Underwritten Offering unless the reasonably expected
aggregate gross proceeds from the offering of the Registrable Securities to be registered in connection with such Underwritten Offering are at least $75,000,000 (the “Minimum Amount”). 

2.1.3    Reduction of Underwritten Offering. If the managing Underwriter or Underwriters in an Underwritten
Offering pursuant to an Underwritten Demand, in good faith, advises or advise the Company, the Demanding Holders, the Requesting Holders and other persons or entities holding Common Stock or other equity securities of the Company that the Company is
obligated to include pursuant to separate written contractual arrangements with such persons or entities (if any) in writing that the dollar amount or number of Registrable Securities or other equity securities of the Company requested to be
included in such Underwritten Offering exceeds the maximum dollar amount or maximum number of equity securities of the Company that can be sold in the Underwritten Offering without adversely affecting the proposed offering price, the timing, the
distribution method or the probability of success of such offering (such maximum dollar amount or maximum number of such securities, as applicable, the “Maximum Number of Securities”), then the Company shall include in such
Underwritten Offering, as follows: (i) first, the Registrable Securities of the Demanding Holders and the Requesting Holders (if any) (pro rata based on the respective number of Registrable Securities that each Demanding Holder and Requesting
Holder (if any) has requested be included in such Underwritten Offering and the aggregate number of Registrable Securities that the Demanding Holders and Requesting Holders have requested be included in such Underwritten Offering (such proportion is
referred to herein as “Pro Rata”)) that can be sold without exceeding the Maximum Number of Securities; (ii) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause
(i), Common Stock or other equity securities of the Company that the Company desires to sell and that can be sold without exceeding the Maximum Number of Securities; and (iii) third, to the extent that the Maximum Number of Securities has
not been reached under the foregoing clauses (i) and (ii), Common Stock or other equity securities of the Company held by other persons or entities that the Company is obligated to include pursuant to separate written contractual
arrangements with such persons or entities and that can be sold without exceeding the Maximum Number of Securities. 

  
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 2.1.4    Registration Withdrawal. The Demanding Holders
initiating an Underwritten Offering pursuant to subsection 2.1.2 of this Agreement shall have the right to withdraw from such Underwritten Offering for any or no reason whatsoever upon written notification to the Company of their intention to
withdraw from such Underwritten Offering prior to the launch of such Underwritten Offering or, if applicable, the effectiveness of the Registration Statement filed with the Commission with respect to the Underwritten Offering; provided,
however, that upon the withdrawal of an amount of Registrable Securities that results in the remaining amount of Registrable Securities included by the Demanding Holders and participating Holders in such Underwritten Offering being less than
the Minimum Amount, the Company may cease all efforts to complete the Underwritten Offering and, for the avoidance of doubt, if such efforts are ceased, such Underwritten Offering shall not be counted as an Underwritten Offering for the purpose of
the final sentence of subsection 2.1.2. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the Registration Expenses incurred in connection with an Underwritten Demand prior to its withdrawal
under this subsection 2.1.4. 
 2.2.    Piggyback Registration. 

2.2.1    Piggyback Rights. If the Company proposes to (i) file a Registration Statement under the Securities
Act with respect to an offering of equity securities of the Company, or securities or other obligations exercisable or exchangeable for, or convertible into equity securities of the Company, for its own account or for the account of stockholders of
the Company, other than a Registration Statement (A) filed in connection with any employee stock option or other benefit plan, (B) for an exchange offer or offering of securities solely to the Company’s existing stockholders,
(C) for an offering of debt that is convertible into equity securities of the Company or (D) for a dividend reinvestment plan, or (ii) consummate an Underwritten Offering for its own account or for the account of stockholders of the
Company, then the Company shall give written notice of such proposed action to all of the Holders of Registrable Securities as soon as practicable (but in the case of filing a Registration Statement, not less than ten (10) days before the
anticipated filing date of such Registration Statement), which notice shall (x) describe the amount and type of securities to be included, the intended method(s) of distribution and the name of the proposed managing Underwriter or Underwriters,
if any, and (y) offer to all of the Holders of Registrable Securities the opportunity to register the sale of such number of Registrable Securities as such Holders may request in writing within (a) five (5) days in the case of filing a
Registration Statement and (b) two (2) days in the case of an Underwritten Offering (unless such offering is an overnight or bought Underwritten Offering, then one (1) day), in each case after receipt of such written notice (such
Registration, a “Piggyback Registration”). The Company shall, in good faith, cause such Registrable Securities to be included in such Piggyback Registration and shall use its commercially reasonable efforts to cause the
managing Underwriter or Underwriters of a proposed Underwritten Offering to permit the Registrable Securities requested by the Holders pursuant to this subsection 2.2.1 to be included in a Piggyback Registration on the same terms and
conditions as any similar securities of the Company included in such Piggyback Registration and to permit the sale or other disposition of such Registrable Securities in accordance with the intended method(s) of distribution thereof. If no written
request for inclusion from a Holder is received within the specified time, each such Holder shall have no further right to participate in such Piggyback Registration. All such Holders proposing to include Registrable Securities in an Underwritten
Offering under this subsection 2.2.1 shall enter into an underwriting agreement in customary form with the Underwriter(s) selected for such Underwritten Offering by the Company. 

2.2.2    Reduction of Piggyback Registration. If the managing Underwriter or Underwriters in an Underwritten
Offering that is to be a Piggyback Registration, in good faith, advises the Company and the Holders of Registrable Securities participating in the Piggyback Registration in writing that the dollar amount or number of shares of the equity securities
of the Company that the Company desires to sell, taken together with (i) the shares of equity securities of the Company, if any, as to which Registration or Underwritten Offering has been demanded pursuant to separate written contractual
arrangements with persons or entities other than the Holders of Registrable Securities hereunder, (ii) the Registrable Securities as to which Registration or Underwritten Offering has been requested pursuant to Section 2.2 of this
Agreement and (iii) the shares of equity securities of the Company, if any, as to which Registration or Underwritten Offering has been requested pursuant to separate written contractual piggyback registration rights of other stockholders of the
Company, exceeds the Maximum Number of Securities, then: 
 (a)    If the Registration or Underwritten Offering is
undertaken for the Company’s account, the Company shall include in any such Registration or Underwritten Offering (A) first, the Common Stock 

  
 5 

 
or other equity securities of the Company that the Company desires to sell, which can be sold without exceeding the Maximum Number of Securities; (B) second, to the extent that the Maximum
Number of Securities has not been reached under the foregoing clause (A), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to subsection 2.2.1 of this Agreement, Pro Rata,
which can be sold without exceeding the Maximum Number of Securities; and (C) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A) and (B), Common Stock or other
equity securities of the Company, if any, as to which Registration or Underwritten Offering has been requested pursuant to written contractual piggyback registration rights of other stockholders of the Company, which can be sold without exceeding
the Maximum Number of Securities; or 
 (b)    If the Registration or Underwritten Offering is pursuant to a request by
persons or entities other than the Holders of Registrable Securities, then the Company shall include in any such Registration or Underwritten Offering (A) first, Common Stock or other equity securities of the Company, if any, of such requesting
persons or entities, other than the Holders of Registrable Securities, which can be sold without exceeding the Maximum Number of Securities; (B) second, to the extent that the Maximum Number of Securities has not been reached under the
foregoing clause (A), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to subsection 2.2.1 of this Agreement, Pro Rata, which can be sold without exceeding the Maximum
Number of Securities; (C) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A) and (B), Common Stock or other equity securities of the Company that the Company
desires to sell, which can be sold without exceeding the Maximum Number of Securities; and (D) fourth, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A), (B) and (C),
Common Stock or other equity securities of the Company for the account of other persons or entities that the Company is obligated to register pursuant to separate written contractual arrangements with such persons or entities, which can be sold
without exceeding the Maximum Number of Securities. 
 2.2.3    Piggyback Registration Withdrawal. Any Holder of
Registrable Securities shall have the right to withdraw from a Piggyback Registration for any or no reason whatsoever upon written notification to the Company and the Underwriter or Underwriters (if any) of his, her or its intention to withdraw from
such Piggyback Registration prior to, as applicable, the effectiveness of the Registration Statement filed with the Commission with respect to such Piggyback Registration or the launch of the Underwritten Offering with respect to such Piggyback
Registration. The Company (whether on its own good faith determination or as the result of a request for withdrawal by persons or entities pursuant to separate written contractual obligations) may withdraw a Registration Statement filed with the
Commission in connection with a Piggyback Registration at any time prior to the effectiveness of such Registration Statement or abandon an Underwritten Offering in connection with a Piggyback Registration at any time prior to the launch of such
Underwritten Offering. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the Registration Expenses incurred in connection with the Piggyback Registration prior to its withdrawal under this subsection
2.2.3. 
 2.2.4    Unlimited Piggyback Registration Rights. For purposes of clarity, any Registration or
Underwritten Offering effected pursuant to Section 2.2 of this Agreement shall not be counted as an Underwritten Offering pursuant to an Underwritten Demand effected under Section 2.1 of this Agreement. 

2.3    Restrictions on Registration Rights. If (A) the Holders have requested an Underwritten Offering
pursuant to an Underwritten Demand and the Company and the Holders are unable to obtain the commitment of underwriters to firmly underwrite the offer; or (B) the Holders have requested an Underwritten Offering pursuant to an Underwritten Demand
and in the good faith judgment of the Board that such Underwritten Offering would be seriously detrimental to the Company and the Board concludes as a result that it is essential to defer the filing of such Registration Statement or the undertaking
of such Underwritten Offering at such time, then in each case the Company shall furnish to such Holders a certificate signed by the Chairman of the Board stating that in the good faith judgment of the Board it would be seriously detrimental to the
Company for such Registration Statement to be filed or to undertake such Underwritten Offering in the near future and that it is therefore essential to defer the filing of such Registration Statement or undertaking of such Underwritten Offering. In
such event, the Company shall have the right to defer such filing or offering for a period of not more than thirty (30) days; provided, however, that the Company shall not defer its obligation in this manner more than once in any twelve
(12)-month period. 

  
 6 

 ARTICLE III 

COMPANY PROCEDURES 

3.1.    General Procedures. The Company shall use its commercially reasonable efforts to effect such Registration
to permit the sale of such Registrable Securities in accordance with the intended plan of distribution thereof, and pursuant thereto the Company shall, as expeditiously as possible and to the extent applicable: 

3.1.1    prepare and file with the Commission, within the time frame required by Section 2.1.1, a Registration
Statement with respect to such Registrable Securities and use its commercially reasonable efforts to cause such Registration Statement to become effective and remain effective, including filing a replacement Registration Statement, if necessary,
until all Registrable Securities covered by such Registration Statement have been sold or are no longer outstanding (such period, the “Effectiveness Period”); 

3.1.2    prepare and file with the Commission such amendments and post-effective amendments to the Registration Statement,
and such supplements to the Prospectus, as may be reasonably requested by the Demanding Holders or any Underwriter or as may be required by the rules, regulations or instructions applicable to the registration form used by the Company or by the
Securities Act or rules and regulations thereunder to keep the Registration Statement effective until all Registrable Securities covered by such Registration Statement are sold in accordance with the intended plan of distribution set forth in such
Registration Statement or supplement to the Prospectus or are no longer outstanding; 
 3.1.3    prior to filing a
Registration Statement or Prospectus, or any amendment or supplement thereto, furnish without charge to the Underwriters, if any, and the Holders of Registrable Securities included in such Registration or Underwritten Offering, and such
Holders’ legal counsel, copies of such Registration Statement as proposed to be filed, each amendment and supplement to such Registration Statement (in each case including all exhibits thereto and documents incorporated by reference therein),
the Prospectus (including each preliminary Prospectus) and such other documents as the Underwriters and the Holders of Registrable Securities included in such Registration or the legal counsel for any such Holders may reasonably request in order to
facilitate the disposition of the Registrable Securities owned by such Holders; provided, that the Company will not have any obligation to provide any document pursuant to this clause that is available on the Commission’s EDGAR system;

 3.1.4    prior to any Registration of Registrable Securities, use its commercially reasonable efforts to
(i) register or qualify the Registrable Securities covered by the Registration Statement under such securities or “blue sky” laws of such jurisdictions in the United States as the Holders of Registrable Securities included in such
Registration Statement (in light of their intended plan of distribution) may request and (ii) take such action necessary to cause such Registrable Securities covered by the Registration Statement to be registered with or approved by such other
governmental authorities as may be necessary by virtue of the business and operations of the Company and do any and all other acts and things that may be necessary or advisable to enable the Holders of Registrable Securities included in such
Registration Statement to consummate the disposition of such Registrable Securities in such jurisdictions; provided, however, that the Company shall not be required to qualify generally to do business in any jurisdiction where it would not
otherwise be required to qualify or take any action to which it would be subject to general service of process or taxation in any such jurisdiction where it is not then otherwise so subject; 

3.1.5    cause all such Registrable Securities to be listed on each securities exchange or automated quotation system on
which similar securities issued by the Company are then listed; 
 3.1.6    provide a transfer agent or warrant agent,
as applicable, and registrar for all such Registrable Securities no later than the effective date of such Registration Statement; 

3.1.7    advise each seller of such Registrable Securities, promptly after it shall receive notice or obtain knowledge
thereof, of the issuance of any stop order by the Commission suspending the effectiveness of such Registration Statement or the initiation or threatening of any proceeding for such purpose and promptly use its commercially reasonable efforts to
prevent the issuance of any stop order or to obtain its withdrawal if such stop order should be issued; 

  
 7 

 3.1.8    during the Effectiveness Period, furnish a conformed copy of
each filing of any Registration Statement or Prospectus or any amendment or supplement to such Registration Statement or Prospectus or any document that is to be incorporated by reference into such Registration Statement or Prospectus, promptly
after such filing of such documents with the Commission to each seller of such Registrable Securities or its counsel; provided, that the Company will not have any obligation to provide any document pursuant to this clause that is available on
the Commission’s EDGAR system; 
 3.1.9    notify the Holders at any time when a Prospectus relating to such
Registration Statement is required to be delivered under the Securities Act; 
 3.1.10    subject to the provisions of
this Agreement, notify the Holders of the happening of any event as a result of which a Misstatement exists, and then to correct such Misstatement as set forth in Section 3.4 of this Agreement; 

3.1.11    permit a representative of the Holders (such representative to be selected by a majority of the Holders),, the
Underwriters, if any, and any attorney or accountant retained by such Holders or Underwriter to participate, at each such person’s own expense, in the preparation of the Registration Statement or the Prospectus, and cause the Company’s
officers, directors and employees to supply all information reasonably requested by any such representative, Underwriter, attorney or accountant in connection with the Registration; provided, however, that such representatives or Underwriters
enter into a confidentiality agreement, in form and substance reasonably satisfactory to the Company, prior to the release or disclosure of any such information; 

3.1.12    obtain a comfort letter from the Company’s independent registered public accountants in the event of an
Underwritten Offering, in customary form and covering such matters of the type customarily covered by comfort letters as the managing Underwriter may reasonably request, and reasonably satisfactory to a majority-in-interest of the participating Holders; 
 3.1.13    on the date the
Registrable Securities are delivered for sale pursuant to such Registration, obtain an opinion, dated such date, of counsel representing the Company for the purposes of such Registration, addressed to the placement agent or sales agent, if any, and
the Underwriters, if any, covering such legal matters with respect to the Registration in respect of which such opinion is being given as the placement agent, sales agent, or Underwriter may reasonably request and as are customarily included in such
opinions and negative assurance letters, and reasonably satisfactory to such placement agent, sales agent or Underwriter; 

3.1.14    in the event of any Underwritten Offering, enter into and perform its obligations under an underwriting
agreement, in usual and customary form, with the managing Underwriter of such offering; 
 3.1.15    make available to
its security holders, as soon as reasonably practicable, an earnings statement covering the period of at least twelve (12) months beginning with the first day of the Company’s first full calendar quarter after the effective date of the
Registration Statement which satisfies the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder (or any successor rule promulgated thereafter by the Commission); 

3.1.16    if the Registration involves the Registration of Registrable Securities in an Underwritten Offering in excess of
the Minimum Amount, use its reasonable efforts to make available senior executives of the Company to participate in customary “road show” presentations that may be reasonably requested by the Underwriter in any Underwritten Offering; and

 3.1.17    otherwise, in good faith, cooperate reasonably with, and take such customary actions as may reasonably be
requested by the Holders, in connection with such Registration. 
 3.2.    Registration Expenses. The
Registration Expenses in respect of all Registrations shall be borne by the Company. It is acknowledged by the Holders that the Holders shall bear all incremental selling expenses relating to the sale of Registrable Securities, such as
Underwriters’ commissions and discounts, brokerage fees, Underwriter marketing costs and, other than as set forth in the definition of “Registration Expenses,” all reasonable fees and expenses of any legal counsel representing the
Holders. 

  
 8 

 3.3.    Requirements for Participation in Underwritten Offerings.
No person may participate in any Underwritten Offering for equity securities of the Company pursuant to a Registration initiated by the Company hereunder unless such person (i) agrees to sell such person’s securities on the basis provided
in any underwriting arrangements approved by the Company and (ii) completes and executes all customary questionnaires, powers of attorney, indemnities, lock-up agreements, underwriting agreements and
other customary documents as may be reasonably required under the terms of such underwriting arrangements. 

3.4    Suspension of Sales. Notwithstanding anything to the contrary in this Agreement, the Company shall be
entitled to (A) delay or postpone the (i) initial effectiveness of any Registration Statement or (ii) launch of any Underwritten Offering, in each case, filed or requested pursuant to this Agreement, and (B) from time to time to
require the Holders not to sell under any Registration Statement or Prospectus or to suspend the effectiveness thereof, if the negotiation or consummation of a transaction by the Company or its subsidiaries is pending or an event has occurred, which
negotiation, consummation or event, the Board reasonably believes, upon the advice of legal counsel, would require additional disclosure by the Company in the applicable Registration Statement or Prospectus of material information that the Company
has a bona fide business purpose for keeping confidential and the non-disclosure of which in the Registration Statement or Prospectus would be expected, in the reasonable determination of the Board, upon the
advice of legal counsel, to cause the Registration Statement or Prospectus to fail to comply with applicable disclosure requirements (each such circumstance, a “Suspension Event”); provided, however, that the Company may not
delay or suspend a Registration Statement, Prospectus or Underwritten Offering on more than two occasions, for more than sixty (60) consecutive calendar days, or more than ninety (90) total calendar days, in each case during any
twelve-month period. Upon receipt of any written notice from the Company of a Suspension Event while a Registration Statement filed pursuant to this Agreement is effective or if as a result of a Suspension Event a Misstatement exists, each Holder
agrees that (i) it will immediately discontinue offers and sales of Registered Securities under each Registration Statement filed pursuant to this Agreement until the Holder receives copies of a supplemental or amended Prospectus (which the
Company agrees to promptly prepare) that corrects the relevant misstatements or omissions and receives notice that any post-effective amendment has become effective or unless otherwise notified by the Company that it may resume such offers and sales
and (ii) it will maintain the confidentiality of information included in such written notice delivered by the Company unless otherwise required by law or subpoena. If so directed by the Company, the Holders will deliver to the Company or, in
Holders’ sole discretion destroy, all copies of each Prospectus covering Registrable Securities in Holders’ possession; provided, however, that this obligation to deliver or destroy shall not apply (A) to the extent the Holders are
required to retain a copy of such Prospectus (x) to comply with applicable legal, regulatory, self-regulatory or professional requirements or (y) in accordance with a bona fide pre-existing document
retention policy or (B) to copies stored electronically on archival servers as a result of automatic data back-up. 

3.5    Reporting Obligations. As long as any Holder shall own Registrable Securities, the Company, at all times
while it shall be a reporting company under the Exchange Act, covenants to file timely (or obtain extensions in respect thereof and file within the applicable grace period) all reports required to be filed by the Company after the date hereof
pursuant to Section 13(a) or 15(d) of the Exchange Act. The Company further covenants that it shall take such further action as any Holder may reasonably request, all to the extent required from time to time to enable such Holder to sell shares
of Registrable Securities held by such Holder without registration under the Securities Act within the limitation of the exemptions provided by Rule 144 promulgated under the Securities Act (or any successor rule promulgated thereafter by the
Commission), including providing any legal opinions. Upon the request of any Holder, the Company shall deliver to such Holder a written certification of a duly authorized officer as to whether it has complied with such requirements. 

ARTICLE IV 

INDEMNIFICATION AND CONTRIBUTION 

4.1.    Indemnification. 

4.1.1    The Company agrees to indemnify, to the extent permitted by law, each Holder of Registrable Securities, its
officers and directors and each person who controls such Holder (within the meaning of the Securities Act) (collectively, the “Holder Indemnified Persons”) against all losses, claims, damages, liabilities and expenses
(including reasonable attorneys’ fees and inclusive of all reasonable attorneys’ fees arising out of the enforcement of each such persons’ rights under this Section 4.1) resulting from any Misstatement or alleged
Misstatement, except insofar as the same are caused by or contained in any information furnished in writing to the Company by or on behalf of such Holder Indemnified Person specifically for use therein. 

  
 9 

 4.1.2    In connection with any Registration Statement in which a Holder
of Registrable Securities is participating, such Holder shall furnish to the Company in writing such information and affidavits as the Company reasonably requests for use in connection with any such Registration Statement or Prospectus and, to the
extent permitted by law, shall, severally and not jointly, indemnify the Company, its directors and officers and agents and each person who controls the Company (within the meaning of the Securities Act) against any losses, claims, damages,
liabilities and expenses (including reasonable attorneys’ fees and inclusive of all reasonable attorneys’ fees arising out of the enforcement of each such persons’ rights under this Section 4.1) resulting from any
Misstatement or alleged Misstatement, but only to the extent that the same are made in reliance on and in conformity with information relating to the Holder so furnished in writing to the Company by or on behalf of such Holder specifically for use
therein. In no event shall the liability of any selling Holder hereunder be greater in amount than the net proceeds received by such Holder from the sale of Registrable Securities pursuant to such Registration Statement giving rise to such
indemnification obligation. 
 4.1.3    Any person entitled to indemnification herein shall (i) give prompt written
notice to the indemnifying party of any claim with respect to which it seeks indemnification (provided that the failure to give prompt notice shall not impair any person’s right to indemnification hereunder to the extent such
failure has not materially prejudiced the indemnifying party) and (ii) unless in such indemnified party’s reasonable judgment a conflict of interest between such indemnified and indemnifying parties may exist with respect to such claim or
there may be reasonable defenses available to the indemnified party that are different from or additional to those available to the indemnifying party, permit such indemnifying party to assume the defense of such claim with counsel reasonably
satisfactory to the indemnified party. If such defense is assumed, the indemnifying party shall not be subject to any liability for any settlement made by the indemnified party without its consent (but such consent shall not be unreasonably
withheld). An indemnifying party who is not entitled to, or elects not to, assume the defense of a claim shall not be obligated to pay the fees and expenses of more than one counsel for all parties indemnified by such indemnifying party with respect
to such claim, unless in the reasonable judgment of any indemnified party a conflict of interest may exist between such indemnified party and any other of such indemnified parties with respect to such claim. No indemnifying party shall, without the
consent of the indemnified party, consent to the entry of any judgment or enter into any settlement which cannot be settled in all respects by the payment of money (and such money is so paid by the indemnifying party pursuant to the terms of such
settlement) or which settlement does not include as an unconditional term thereof the giving by the claimant or plaintiff to such indemnified party of a release from all liability in respect to such claim or litigation. 

4.1.4    The indemnification provided for under this Agreement shall remain in full force and effect regardless of any
investigation made by or on behalf of the indemnified party or any officer, director or controlling person of such indemnified party and shall survive the transfer of securities. 

4.1.5    If the indemnification provided under Section 4.1 of this Agreement is held by a court of competent
jurisdiction to be unavailable to an indemnified party in respect of any losses, claims, damages, liabilities and expenses referred to herein, then the indemnifying party, in lieu of indemnifying the indemnified party, shall to the extent permitted
by law contribute to the amount paid or payable by the indemnified party as a result of such losses, claims, damages, liabilities and expenses in such proportion as is appropriate to reflect the relative fault of the indemnifying party and the
indemnified party, as well as any other relevant equitable considerations. The relative fault of the indemnifying party and indemnified party shall be determined by a court of law by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by such indemnifying party or such indemnified party and the indemnifying party’s and indemnified party’s
relative intent, knowledge, access to information and opportunity to correct or prevent such action; provided, however, that the liability of any Holder under this subsection 4.1.5 shall be limited to the amount of the net proceeds
received by such Holder in such offering giving rise to such liability. The amount paid or payable by a party as a result of the losses or other liabilities referred to above shall be deemed to include, subject to the limitations set forth in
subsections 4.1.1, 4.1.2 and 4.1.3 of this Agreement, any legal or other fees, charges or expenses reasonably incurred by such party in connection with any investigation or proceeding. The parties hereto agree that it would not
be just and equitable if contribution pursuant to this subsection 4.1.5 were determined by pro rata allocation or by any other method of allocation, which does not 

  
 10 

 
take account of the equitable considerations referred to in this subsection 4.1.5. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the
Securities Act) shall be entitled to contribution pursuant to this subsection 4.1.5 from any person who was not guilty of such fraudulent misrepresentation. 

ARTICLE V 
 MISCELLANEOUS

 5.1    Notices. Any notice or communication under this Agreement must be in writing and given by
(i) deposit in the United States mail, addressed to the party to be notified, postage prepaid and registered or certified with return receipt requested, (ii) delivery in person or by courier service providing evidence of delivery or
(iii) transmission by hand delivery, telecopy, telegram, facsimile or email. Each notice or communication that is mailed, delivered or transmitted in the manner described above shall be deemed sufficiently given, served, sent, and received, in
the case of mailed notices, on the third (3rd) business day following the date on which it is mailed, in the case of notices delivered by courier service, hand delivery, telecopy or telegram, at such time as it is delivered to the addressee (with
the delivery receipt or the affidavit of messenger) or at such time as delivery is refused by the addressee upon presentation, and in the case of notices delivered by facsimile or email, at such time as it is successfully transmitted to the
addressee. Any notice or communication under this Agreement must be addressed, if to the Company or the Sponsor prior to the closing of the Business Combination or to the Sponsor after the closing of the Business Combination, to: 2744 Sand Hill
Road, Menlo Park, CA 94025, or by email at: phaskopoulos@riverstonellc.com, if to the Company after the closing of the Business Combination, to: Hyzon Motors Inc., 85 East Street, Honeoye Falls, New York 14472, Attention: Craig Knight, George Gu, or
by email at: craig.knight@hyzonmotors.com, gg@hyzonmotors.com, and, if to any Holder, to the address of such Holder as it appears in the applicable register for the Registrable Securities or such other address as may be designated in writing by such
Holder (including on the signature pages hereto). Any party may change its address for notice at any time and from time to time by written notice to the other parties hereto, and such change of address shall become effective thirty (30) days
after delivery of such notice as provided in this Section 5.1. 
 5.2    Assignment; No Third Party
Beneficiaries. 
 5.2.1    This Agreement and the rights, duties and obligations of the Company hereunder may not be
assigned or delegated by the Company in whole or in part. 
 5.2.2    This Agreement and the provisions hereof shall be
binding upon and shall inure to the benefit of each of the parties and its successors. 
 5.2.3    This Agreement shall
not confer any rights or benefits on any persons that are not parties hereto or do not hereafter become a party to this Agreement pursuant to Section 5.2 of this Agreement. 

5.2.4    No assignment by any party hereto of such party’s rights, duties and obligations hereunder shall be binding
upon or obligate the Company unless and until the Company shall have received (i) written notice provided in accordance with Section 5.1 of this Agreement and (ii) the written agreement of the assignee, in a form reasonably
satisfactory to the Company, to be bound by the terms and provisions of this Agreement (which may be accomplished by an addendum or certificate of joinder to this Agreement). Any transfer or assignment made other than as provided in this
Section 5.2 shall be null and void. 
 5.3    Counterparts. This Agreement may be executed in
multiple counterparts (including facsimile or PDF counterparts), each of which shall be deemed an original, and all of which together shall constitute the same instrument, but only one of which need be produced. 

5.4    Governing Law; Venue. NOTWITHSTANDING THE PLACE WHERE THIS AGREEMENT MAY BE EXECUTED BY ANY OF THE PARTIES
HERETO, THE PARTIES EXPRESSLY AGREE THAT THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED UNDER THE LAWS OF THE STATE OF NEW YORK AS APPLIED TO AGREEMENTS AMONG NEW YORK RESIDENTS ENTERED INTO AND TO BE PERFORMED ENTIRELY WITHIN NEW YORK, WITHOUT
REGARD TO THE CONFLICT OF LAW PROVISIONS OF SUCH JURISDICTION. 

  
 11 

 5.5    Amendments and Modifications. Upon the written consent of
the Company and the Holders of at least a majority in interest of the Registrable Securities at the time in question, compliance with any of the provisions, covenants and conditions set forth in this Agreement may be waived, or any of such
provisions, covenants or conditions may be amended or modified; provided, however, that notwithstanding the foregoing, any amendment hereto or waiver hereof that adversely affects one Holder, solely in his, her or its capacity as a holder of
the shares of capital stock of the Company, in a manner that is materially different from the other Holders (in such capacity) shall require the consent of the Holder so affected. No course of dealing between any Holder or the Company and any other
party hereto or any failure or delay on the part of a Holder or the Company in exercising any rights or remedies under this Agreement shall operate as a waiver of any rights or remedies of any Holder or the Company. No single or partial exercise of
any rights or remedies under this Agreement by a party shall operate as a waiver or preclude the exercise of any other rights or remedies hereunder or thereunder by such party. 

5.6    Other Registration Rights. The Company represents and warrants that no person, other than (a) a Holder
of Registrable Securities, (b) the parties to those certain Subscription Agreements, dated as of February 8, 2021, by and between the Company and certain investors, (c) the holders of the Company’s warrants pursuant to that
certain Warrant Agreement, dated as of October 19, 2020, by and between the Company and Continental Stock Transfer & Trust Company, and (d) Ardour Capital Investments LLC pursuant to that certain Warrant Agreement, dated as of the
date hereof, by and between the Company and Continental Stock Transfer & Trust Company, has any right to require the Company to register any securities of the Company for sale or to include such securities of the Company in any Registration
filed by the Company for the sale of securities for its own account or for the account of any other person. Further, the Company represents and warrants that this Agreement supersedes any other registration rights agreement or agreement with similar
terms and conditions and in the event of a conflict between any such agreement or agreements and this Agreement, the terms of this Agreement shall prevail. 

5.7    Term. This Agreement shall terminate upon the earlier of (i) the tenth (10th) anniversary of the date
of this Agreement and (ii) with respect to any Holder, the date as of which such Holder ceases to hold any Registrable Securities. The provisions of Article IV shall survive any termination. 

[SIGNATURE PAGES FOLLOW] 

  
 12 

 IN WITNESS WHEREOF, the undersigned have caused this Agreement to be executed as of
the date first written above. 
  

			
	COMPANY:
	
	 DECARBONIZATION PLUS ACQUISITION

CORPORATION,
 a Delaware corporation

		
	By:	 	 /s/ Peter Haskopoulos

		 	Name: Peter Haskopoulos
		 	 Title: Chief Financial Officer, Chief Accounting

            Officer and Secretary

	
	HOLDERS:
	
	 DECARBONIZATION PLUS ACQUISITION

SPONSOR, LLC,
 a Delaware limited liability
company

		
	By:	 	 /s/ Peter Haskopoulos

		 	Name: Peter Haskopoulos
		 	Title: Authorized Person
	
	WRG DCRB INVESTORS, LLC
		
		 	 By: West River Management, LLC, its

Managing Member

		
	 By:
	 	  

	 Name: Trent Dawson

	 Title: Chief Financial Officer

	
	  

	 James AC McDermott

	
	  

	 Jeffrey Tepper

	
	  

	 Dr. Jennifer Aaker

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 IN WITNESS WHEREOF, the undersigned have caused this Agreement to be executed as of
the date first written above. 
  

			
	COMPANY:
	
	 DECARBONIZATION PLUS ACQUISITION

CORPORATION,
 a Delaware corporation

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	 Title: Chief Financial Officer, Chief Accounting

            Officer and Secretary

	
	HOLDERS:
	
	 DECARBONIZATION PLUS ACQUISITION

SPONSOR, LLC,
 a Delaware limited liability
company

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	Title: Authorized Person
	
	WRG DCRB INVESTORS, LLC
		
		 	 By: West River Management, LLC, its

Managing Member

		
	 By:
	 	 /s/ Trent Dawson

	 Name: Trent Dawson

	 Title: Chief Financial Officer

	
	  

	 James AC McDermott

	
	  

	 Jeffrey Tepper

	
	  

	 Dr. Jennifer Aaker

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 IN WITNESS WHEREOF, the undersigned have caused this Agreement to be executed as of
the date first written above. 
  

			
	COMPANY:
	
	 DECARBONIZATION PLUS ACQUISITION

CORPORATION,
 a Delaware corporation

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	 Title: Chief Financial Officer, Chief Accounting

            Officer and Secretary

	
	HOLDERS:
	
	 DECARBONIZATION PLUS ACQUISITION

SPONSOR, LLC,
 a Delaware limited liability
company

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	Title: Authorized Person
	
	WRG DCRB INVESTORS, LLC
		
		 	 By: West River Management, LLC, its

Managing Member

		
	 By:
	 	 /s/ Trent Dawson

	 Name: Trent Dawson

	 Title: Chief Financial Officer

	
	 /s/ James AC McDermott

	 James AC McDermott

	
	  

	 Jeffrey Tepper

	
	  

	 Dr. Jennifer Aaker

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 IN WITNESS WHEREOF, the undersigned have caused this Agreement to be
executed as of the date first written above. 
  

			
	COMPANY:
	
	 DECARBONIZATION PLUS ACQUISITION

CORPORATION,
 a Delaware corporation

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	 Title: Chief Financial Officer, Chief Accounting

            Officer and Secretary

	
	HOLDERS:
	
	 DECARBONIZATION PLUS ACQUISITION

SPONSOR, LLC,
 a Delaware limited liability
company

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	Title: Authorized Person
	
	WRG DCRB INVESTORS, LLC
		
		 	 By: West River Management, LLC, its

Managing Member

		
	 By:
	 	  

	 Name: Trent Dawson

	 Title: Chief Financial Officer

	
	  

	 James AC McDermott

	
	 /s/ Jeffrey Tepper

	 Jeffrey Tepper

	
	  

	 Dr. Jennifer Aaker

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 IN WITNESS WHEREOF, the undersigned have caused this Agreement to be executed as of
the date first written above. 
  

			
	COMPANY:
	
	 DECARBONIZATION PLUS ACQUISITION

CORPORATION,
 a Delaware corporation

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	 Title: Chief Financial Officer, Chief Accounting

            Officer and Secretary

	
	HOLDERS:
	
	 DECARBONIZATION PLUS ACQUISITION

SPONSOR, LLC,
 a Delaware limited liability
company

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	Title: Authorized Person
	
	WRG DCRB INVESTORS, LLC
		
		 	 By: West River Management, LLC, its

Managing Member

		
	 By:
	 	  

	 Name: Trent Dawson

	 Title: Chief Financial Officer

	
	  

	 James AC McDermott

	
	  

	 Jeffrey Tepper

	
	 /s/ Dr. Jennifer Aaker

	 Dr. Jennifer Aaker

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 IN WITNESS WHEREOF, the undersigned have caused this Agreement to be executed as of
the date first written above. 
  

			
	COMPANY:
	
	 DECARBONIZATION PLUS ACQUISITION

CORPORATION,
 a Delaware corporation

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	 Title: Chief Financial Officer, Chief Accounting

            Officer and Secretary

	
	HOLDERS:
	
	 DECARBONIZATION PLUS ACQUISITION

SPONSOR, LLC,
 a Delaware limited liability
company

		
	By:	 	  

		 	Name: Peter Haskopoulos
		 	Title: Authorized Person
	
	WRG DCRB INVESTORS, LLC
		
		 	 By: West River Management, LLC, its

Managing Member

		
	 By:
	 	  

	 Name: Trent Dawson

	 Title: Chief Financial Officer

	
	  

	 James AC McDermott

	
	  

	 Jeffrey Tepper

	
	  

	 Dr. Jennifer Aaker

	
	 /s/ Jane Kearns

	 Jane Kearns

	
	  

	 Michael Warren

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 
	
	  

	Jane Kearns
	
	 /s/ Michael Warren

	Michael Warren

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 
			
	 HYMAS PTE LTD,
 a Singapore
private company limited by shares

		
	By:	 	 /s/ Craig Knight

		 	Name: Craig Knight
		 	Title: Director

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 
			
	GEORGE GU
		
	By:	 	 /s/ George GU

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 
			
	CRAIG KNIGHT
		
	By:	 	 /s/ Craig Knight

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 
			
	VIKTOR MENG
		
	By:	 	 /s/ Viktor Meng

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 
			
	DENNIS EDWARDS
		
	By:	 	 /s/ Dennis Edwards

 [Signature Page to Amended and Restated Registration Rights Agreement] 

 
			
	ELAINE WONG
		
	By:	 	 /s/ Elaine Wong

 [Signature Page to Amended and Restated Registration Rights Agreement]

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