bluuebunny/crossref_metadata_2025_split huggingface dataset:
All-Inkjet-Printed Thin-Film Solid Oxide Fuel Cell
Authors: Han Gwon Deok , Han Hyun Soo , Chaikasetsin Settasit , Jung Yunha , Trettel Howard Tyler , Prinz Fritz , Shim Joon Hyung 
Published: November 2022

Inkjet printing is a rapid prototyping tool that allows users to easily and quickly produce thin-film devices with inks containing desired functional materials. For example, users can use Computer-Aided Design or MS Office software to draw a pattern image and then simply "print" it to create wide, complex thin film devices made of a variety of functional materials. Therefore, inkjet printing can be effectively used to design and prototype thin film-based solid state devices for evaluating the properties of ion-conducting membranes or electrocatalysts.
Solid oxide fuel cells (SOFCs) are one of the thin film based-solid state ionic devices that can produce electric energy in an eco-friendly way. SOFCs operating at high temperature have the advantages of high cogeneration efficiency and fuel flexibility, but their wide application is limited due to reduced long-term durability and high system cost. Accordingly, many studies have been conducted to develop the thin film-based SOFCs capable of high-performance driving in a low-temperature range.[1,2] Incorporation of nanoscale-thick ceramic electrolytes into SOFCs can minimize energy loss due to slow ion transport in the low-temperature region and achieve high power output.
In this study, we demonstrated the applicability of inkjet printing to the fabrication of thin-film-based SOFCs containing nanoscale-thick yttria-stabilized zirconia (YSZ) electrolyte.[3] Our study was performed using a low-price HP inkjet printer and the structural design of thin film-based SOFC was controlled by the MS Office software. A functional ceramic ink including an electrode and an electrolyte material, respectively, was synthesized to have fluidity suitable for printing. A full inkjet-printed SOFC with nanoscale-thick YSZ electrolyte achieved a peak power density of 730 mw/cm2 at 650°C and a robust durability of 0.0002V h-1. It is significant in that economic feasibility and long-term stability are increasingly emerging as important attributes in terms of generalization of SOFC technology.

References

[1] M. Cassir, A. Ringuedé, L. Niinistö, J. Mater. Chem.
2010, 20, 8987.
[2] J. H. Shim, G. D. Han, H. J. Choi, Y. Kim, S. Xu, J. An, Y. B. Kim, T. Graf, T. D. Schladt, T. M. Gür, F. B. Prinz, Int. J. Precis. Eng. Manuf. - Green Technol.
2019, 6, 629.
[3] G. D. Han, K. Bae, E. H. Kang, H. J. Choi, J. H. Shim, ACS Energy Lett.
2020, 5, 1586.
Metal-Coordinated Hydrogels As Efficient Oxygen Evolution Electrocatalysts
Authors: Tang Chaoyun , Asefa Tewodros , Wu Nianqiang 
Published: November 2022

Conductive polymer hydrogels have large surface area and high conductivity. Their properties can easily be tailored further by functionalizing them with metals and nonmetals. However, the potential of metal-conjugated hydrogels for electrocatalysis has rarely been investigated. In this work, we report the synthesis of transition metals-conjugated polyaniline-phytic acid (PANI-PA) hydrogels that show efficient electrocatalytic properties for the oxygen evolution reaction (OER). Among many transition metals studied, Fe is accommodated by the hydrogel the most because of the favorable affinity of the PA groups in the hydrogel for Fe. Meanwhile, those containing both Fe and Co are found to be the most effective for electrocatalysis of OER. The most optimized such hydrogel, NF@Hgel-Fe0.3Co0.1, which has 3:1 ratio of Fe and Co, needs an overpotential of only 280 mV to catalyze OER with a current density of 10 mV cm-2 in 1 M KOH solution. Furthermore, these metal-doped PANI-PA hydrogels can easily be loaded on nickel foam and carbon cloth via a simple soak-and-dry method to form free-standing electrodes. Overall, the work demonstrates a facile synthesis and fabrication of sustainable OER electrocatalysts and electrodes that are composed of easily processable hydrogels conjugated with various earth-abundant transition metals.
Figure R. Schematic illustration of the synthesis of PA-PANI-Metal (Hgel-M
x
) hydrogels for electrocatalysis of OER.

Figure 1
(Invited) Monolithic All-Perovskite Tandem Cells for Unassisted Water Splitting
Authors: Song Zhaonng , Li Chongwen , Chen Lei , Yan Yanfa 
Published: November 2022

The past decade has witnessed a rapid evolution of research on metal halide perovskite-based optoelectronic and energy devices. In light of this remarkable progress, photoelectrochemical (PEC) cells based on halide perovskite photoabsorbers have recently emerged as a promising solar fuel technology. Notably, the bandgap tunability and low-temperature processing make monolithic all-perovskite tandem cells ideal candidates for achieving efficient, cost-effective, unassisted solar-driven water electrolysis devices.
Here, we report our progress on fabricating monolithic all-perovskite tandem cells consisting of two solution-processed perovskite subcells for unassisted water-splitting applications. The all-perovskite tandem devices are achieved by monolithically integrating a wide-bandgap (1.7 – 2.1 eV) Pb-based mixed-halide (Br-I) perovskite top subcell and a narrower-bandgap (1.25 - 1.55 eV) bottom subcell based on Pb-based or mixed Pb-Sn iodide perovskites. Varying the halide perovskite composition for each subcell enables us to tailor the photovoltaic performance of the tandem devices. We demonstrate that all-perovskite tandem devices with various bandgap compositions can deliver open-circuit voltages of more than 2 V. The high photovoltage provides a sufficient overpotential to drive unassisted PEC water splitting with a solar-to-hydrogen conversion efficiency of more than 10%. Additionally, we show that proper water-impermeable encapsulants are needed to prevent degradation of the halide perovskite absorbers in an aqueous environment and enable a long operational lifetime.
(Invited) Towards Broadband Solar Fuel Production
Authors: Ma Dongling 
Published: November 2022

Combining nanomaterials of different properties into nanohybrids can potentially lead to improved properties/performance or multiple functions. In particular, forming nanomaterials junctions and using plasmons represent two important, promising strategies for realizing broadband photocalysis in strategically important applications such as solar fuels and photocatalytic degradation of pollutants in our environments. In this talk, I will present some of our recent work on the rational design and realization of nanohybrid materials as well as their applications in solar fuel and photocatalysis. For instance, the construction of homojunctions of nanoplates made of metal–organic frameworks (MOF) led to broadened light absorption and increased photoactivity. The well-defined MOF homojunction was prepared by a facile one-pot synthesis route directed by hollow transition metal nanoparticles. The homojunction is enabled by two concentric stacked nanoplates with slightly different crystal phases. The enhanced charge separation in the homojunction was visualized by in-situ surface photovoltage microscopy. The as-prepared nanostacks displayed a visible-light-driven carbon dioxide reduction with very high carbon monooxide selectivity, and excellent stability. Another example is about the in situ synthesis of plasmonic Ag nanoparticles (AgNPs) and Ag-MOM (metal organic matrix) using one-step facile approach. The intimate and stable interface between the AgNPs and Ag-MOM and hot electron transfer from the plasmonic AgNPs to MOM led to highly efficient visible-light photocatalytic H2 generation in aqueous solution, which surpasses most of reported MOF-based photocatalytic systems. This work sheds light on effective electronic and energy bridging between plasmonic NPs and metal organic matrix.
Related References: [1] Nature communications, 12, Article number: 1231 (2021); [2] Nature communications, 2022, under revision; [3] Chemistry of Materials, 2021, 33, 695-705; [4] Adv. Funct. Mater. 2019, 1902486.
Coupled CO2 reduction and Alcohol Oxidation for Fuel Synthesis and CO2 Utilization
Authors: Fields Jacob , Singh Nirala , Jawahar Hussaini Syed Mubeen 
Published: November 2022

Electro-conversion CO2 to fuels like formic acid, methanol, and ethanol is an attractive method to recycle CO2 and close the carbon cycle associated with these fuels, which could benefit the environment, national energy security

Many CO2 electrolyzers oxidize water or hydroxyl ions as a counter reaction which releases oxygen. However, this can lead to a large cell potential due to oxygen’s large, positive reduction potential. Further, oxygen is a relatively low-value product. These systems also use an ion exchange membrane to prevent crossover of CO2 reduction products to the anode while conducting ions between the electrodes.
Instead of oxygen evolution, the partial oxidation of alcohols could serve as the anodic counter reaction to synthesize oxygenated fuel additives. Partial alcohol oxidation could be coupled with CO2 reduction which could regenerate the alcohol. Coupling the anodic and cathodic reactions in this way could preclude the need for an ion exchange membrane, and lower required energy input by decreasing the thermodynamic cell voltage. Our system is also capable of high-pressure operation, which could allow higher concentrations of CO2 in the electrolyte. This study examines the use of alcohol/water mixtures as a working fluid for a CO2 electrolyzer, and the effect of pressure and catalyst composition on the current density and product selectivity. Linear sweep voltammetry and chronoamperometry will be used to evaluate the current densities and cell voltages for different catalysts at pressures up to 90 bar. Gas and liquid products will be analyzed following chronoamperometry studies to determine the faradaic efficiencies. Noble and transition metal catalysts will be used at the cathode and anode based on their purported ability to drive CO2 reduction to alcohol and partial oxidation of alcohols.
Formaldehyde Self-Condensation Reaction for C-C Coupling on CuP2 Electro Catalyst Reducing CO2 to Multi-Carbon
Authors: Choi Minjun , Lee Jaeyoung 
Published: November 2022

Use of electrochemical method for reduction of carbon dioxide (CO2) convert into valuable organic compounds, is a great solution to solve the problem of CO2 accumulation. The most advantage of electrochemical conversion is to elect reaction to produce a few organic compounds from carbon dioxide depending to types of catalyst. Among many types of catalyst, metal catalysts based on Copper element or alloy metals offers the route to synthesize multi-carbon fuels and chemicals from CO2 (e.g., ethylene, ethanol and n-propanol). [1], [2]
, [3]

In this study we focused on the autonomous nonfaradaic reaction of C-C coupling using CuP2 electrode. In our previous study, the generation of 1-butanol from carbon dioxide (CO2) on a phosphorus-rich copper cathode was first reported, based on a combination of faradaic and autonomous nonfaradaic reactions.[
4] The faradaic efficiency of the obtained formate and acetaldehyde intermediates led us to propose a mechanism for the formation of 1-butanol that does not include a *CO dimerization step. 13C labeling experiments confirmed that the origin of each product was from dissolved CO2. This study provides a perspective on the C–C coupling reaction on Cu-based electrocatalysts for the electroreduction of CO2 into high-value multicarbon products.

References

[1] Park G, Hong S, Choi M, Lee S, Lee J*, Catalysis today, 355, 340-346 (2020)
[2] Lee S, Choi M, Lee J*, The Chemical Record, 20, 89-101 (2020)
[3] Choi M‡, Kim J‡, Chung S, Lee Y, Bong S, Lee J*, Chemical Engineering Journal, 430, 132563 (2022)
[4] Choi M, Bong S, Kim J, Lee J*, ACS Energy Letters, 6, 2090-2095 (2021)

Figure 1
Determining Substrate Oxygen Transport Resistance at Limiting Current Using Pore Network Modelling
Authors: Guan Raymond , Bazylak Aimy 
Published: November 2022

The polymer electrolyte membrane (PEM) fuel is a promising technology to supplant traditional, greenhouse gas emitting energy conversion devices. However, widespread commercial adoption of the PEM fuel cell is hindered by the high cost of the precious metals required for its catalyst (1). The amount of catalyst required in a PEM fuel cell can be reduced if the reactant (oxygen) is delivered more efficiently to the catalyst. Therefore, previous studies have sought to characterize the mechanisms affecting oxygen transport in PEM fuel cells (2)(3)(4)(5). In past studies, the oxygen transport resistance of a PEM fuel cell was measured at limiting current, and this value was further decomposed into contributions from individual PEM fuel components using empirical modelling. By resolving each PEM fuel cell component’s contribution to oxygen transport resistance, an informed approach can be undertaken to design next generation components with enhanced oxygen transport capabilities.
In this study, we employed pore network modelling to quantify the oxygen transport resistance arising from the presence of liquid water within the substrate region of the gas diffusion layer (GDL). First, we captured the operando liquid water distribution within a PEM fuel cell operating at limiting current using synchrotron X-ray radiography. Next, we used a combination of invasion percolation and an in-house water invasion inlet selection algorithm to partially saturate the representative pore network of the substrate and to reproduce the mean water saturation. Finally, we obtained substrate oxygen transport resistance values by performing transport simulations on the partially saturated pore network and compare our findings with the experimental observations.

References

X. X. Wang, M. T. Swihart, and G. Wu, Nature catalysis, 2, 7 (2019).

D. R. Baker, D. A. Caulk, K. C. Neyerlin, and M. W. Murphy, J. Electrochem. Soc., 156, B991 (2009).

T. Reshtenko, J. St-Pierre, J. Electrochem. Soc., 161, F1089 (2014)

D. Muirhead, R. Banerjee, M. G. George, N. Ge, P. Shrestha, H. Liu, J. Lee, A. Bazylak, Electrochimica Acta, 274 (2018).

N. Ge, P. Shrestha, M. Balakrishnan, D. Ouellette, A. K. C. Wong, H. Liu, C. H. Lee, J. K. Lee, A. Bazylak, Electrochimica acta,
328 (2019).
Tuning the Selectivity of Liquid Products during CO Electroreduction
Authors: Hasa Bjorn 
Published: November 2022

The electrochemical carbon dioxide reduction (eCO2RR) into value-added chemicals and fuels offers a sustainable route to close the anthropogenic carbon cycle and store the renewable sources' excess energy into chemical bonds. Typically, eCO2RR/eCORR studies employ reactant reduction in the cathode and oxygen evolution reaction in the anode. The membrane (membrane electrode assembly configuration) facilitates the ion transport between the two electrodes and chemically isolate the occurring electrochemical half-reactions. It should be noted that investigators have conceptualized the use of ion-exchange membranes in order to improve the reaction energy efficiency and rate. However, the impact of membrane properties on reaction selectivity, stability, and efficiency remains unexplored.
Herein, we investigated the role of anion exchange membrane on the CO reduction performance using a membrane electrode assembly configuration. This talk will provide insights into the ion-exchange membrane's role in the electrocatalytic reduction of CO. We will show how the membrane properties determine the product crossover, product selectivity, and stability. For example, we will discuss: i) the impact of membrane thickness on the product crossover and applied potential, ii) the role of the membrane on the cell stability, iii) the possibility of various membrane functional groups to tune the reaction selectivity and stability, and iv) the role of counter-ion, ion exchange capacity (IEC), and membrane reinforcement on the cell performance. This work will provide a first step toward designing an ion-exchange membrane with the desired characteristics for CO electroreduction.
Luminescence Thermometry - Crossing the Limits of Operating Range
Authors: Sójka Małgorzata , Piotrowski Wojciech , Marciniak Łukasz , Carlos Luis D. , Zych Eugeniusz 
Published: November 2022

Temperature is one of the fundamental thermodynamic parameters that affects and regulates the rate and nature of the chemical, physical and biological processes. A precise and accurate measurement of temperature is essential across a broad spectrum of areas, such as nanomedicine, electronics, aerospace, climate, food storage, etc. Therefore, there is a great variety of temperature sensors (which currently account for ≈80% of the worldwide sensor market), and their operating modes can be divided into two main groups: contact and noncontact techniques. However, in some specific cases, only non-contact systems may provide accurate information about temperature and its distribution over an area. These are as follows: harsh environments (for example inside turbines), fast-moving objects (gas jets), intense magnetic fields that prevent the use of metals or materials with free electric charges (NMR therapies) or when the size of the system to measure is smaller than 10 μm (cellular tracking or microelectronic circuits). One promising solution that can break through those limitations is luminescence thermometry (LT). LT is a non-contact and non-invasive spectroscopic technique based on the changes in a phosphor emission when temperature changes (e.g., the intensity of a band, relative intensities, band shapes, excited-state lifetimes, etc.).
We shall present our original approach to use intra- and inter- configurational transitions of Pr3+ ion for accurate temperature reading with high relative sensitivity over an outstandingly wide range of temperatures. Studies were focused on Y2SiO5:0.05%Pr and its chemically modified version by a bandgap engineering approach (replacing Si with Ge). The addition of Ge to replace Si was expected to decrease the host bandgap – energetic separation of its valence and conduction bands. Consequently, we expected that the 5d→4f luminescence would be more susceptible to temperature quenching. This, in turn, allowed to control the range of temperatures within which the 5d→4f/4f→4f emission intensity ratio could be utilized for thermometry. Furthermore, possibilities to further improve such sensors will be discussed by widening the operating range of distinct thermometers.
This presentation will show that luminescence thermometers working in unprecedented board operating range can be effectively constructed and managed. Further analysis of such an approach will be carefully discussed.

This research was supported by the National Science Centre, Poland under grant #2020/37/N/ST5/02507

Figure 1
(Digital Presentation) Tailored Rare Earth-Doped Nanomaterials Toward Information Storage and Deep Learning Decoding
Authors: Sun Lining 
Published: November 2022

Lanthanide-doped nanoparticles have been considered as one of the most promising luminescent materials due to their excellent properties such as high photochemical stability, long-lived (μs-ms) luminescence, narrow emission band, and low toxicity.Moreover, benefiting from a unique electronic structure (4fn5s25p6
, n = 0-14), lanthanides have discrete energy levels and exhibit practical wavelength conversion via downshifting and upconversion processes. Hence, their emissions cover the spectral regions from ultraviolet (UV) to near-infrared (NIR).[1,2]

Here, my talk is mainly devoted to our recent developments, including (1) recently, we present a new composition of Er3+-based upconversion nanoparticles with color-switchable output under irradiation with 980, 808, or 1535 nm light for information security. The variation of excitation wavelengths changes the intensity ratio of visible (Vis)/near-infrared 1535 nm (NIR-II) emissions. Taking advantage of the Vis/NIR-II multi-modal emissions of upconversion nanoparticles and deep learning, we successfully demonstrated the storage and decoding of visible light information in pork tissue.[3] (2) we construct heterostructured nanocomposites based on upconversion nanoparticles and EuSe semiconductors by using cation exchange method. It is generally considered that epitaxial growth is difficult when the lattice mismatch is large between two materials. In this case, the cation exchange of Eu3+ ions and other rare-earth ions could promote the formation of buffer layers to reduce the lattice mismatch and promote the heterogeneous epitaxial growth of EuSe on the upconversion nanoparticles. The heterostructured nanocomposites can emit tunable multicolor fluorescence under excitation of UV, continuous NIR, and pulsed NIR light. Based on the advantage of multiple tunable luminescence, the nanocomposites are designed as optical modules to load optical information. This work enables multi-dimensional storage of information and provides new insights into the design and fabrication of next-generation storage materials.

References

[1] L. N. Sun, R. Wei, J. Feng, and H. J. Zhang, Tailored lanthanide-doped upconversion nanoparticles and their promising bioapplication prospects, Coordination Chemistry Reviews, 2018, 364, 10-32.
[2] G. Sun, Y. Xie, L. N. Sun, and H. J. Zhang, Lanthanide Upconversion and Downshifting Luminescence for Biomolecules Detection, Nanoscale Horizons, 2021, 6(10), 766 – 780.
[3] Y. Song, M. Lu, G. A. Mandl, Y. Xie, G. Sun,J. Chen, X. Liu,J. A. Capobianco, and L. N. Sun, “Energy Migration Control of Multimodal Emissions in an Er3+-Doped Nanostructure for Information Encryption and Deep-Learning Decoding”, Angewandte Chemie International Edition
, 2021, 60(44), 23790–23796.
(Invited, Digital Presentation) Surface Engineering of Fluorescent CsPbBr3 and Carbon Quantum Dots By Perfluorocarboxylic Acid
Authors: Isobe Tetsuhiko , Iso Yoshiki 
Published: November 2022

CsPbX3 (X = Cl, Br, I) perovskite quantum dots (QDs) are an extremely attractive material with a narrow fluorescence peak and tunable emission color by halogen composition. Surface ligands have a variety of effects, including control of size and shape, uniform dispersion through good affinity with solvents and matrices, elimination of quenching sites due to surface defect capping effects and subsequent improvement of luminescent properties, and improvement of stability through surface protection. CsPbX3 QDs can be synthesized by hot injection and room temperature precipitation methods, using oleic acid (OA) and oleylamine (OLA) as surface ligands. One of the problems with these QDs is their low stability; the mechanism of degradation of QDs is the easy proton transfer between the carboxylate groups of OA and the ammonium groups of OLA on the surface of the QDs, resulting in the desorption of OA and OLA from the QD surface. Ligand desorption creates halogen vacancies, which act as trap levels that cause nonradiative recombination; therefore, it is important to design ligands that hardly desorb from the QD surface to suppress degradation of the QDs. In this talk, we will introduce our results on surface ligand of perfluorocarboxylic acid that improves thermal stability of CsPbBr3 QDs [1].
Fluorescent carbon quantum dots (CQDs) are attracting attention as an alternative material to toxic QDs. In order to synthesize CQDs with a variety of fluorescent colors, it is effective to select aromatic compounds as carbon sources. The fluorescence color of CQDs changes depending on the polarity of the dispersant. This fluorescence solvatochromism is attributed to the change in the HOMO-LUMO energy gap of CQDs through the dipolar and hydrogen bonding interactions between CQDs and the dispersant molecules. In this talk, we will show that fluorescence solvatochromism of CQDs synthesized from p-phenylenediamine can be modulated by surface modification with perfluorocarboxylic acid [2].
[1] D. Sato, Y. Iso, T. Isobe, ACS Omega, 5, 1178-1187 (2020).
[2] K. Sato, R. Sato, Y. Iso, T. Isobe, Chem. Commun., 56, 2174-2177 (2020).