DOI: 10.5061/dryad.47d7wm3k6
title: Data from: Electrodeposition of iron from 1-ethyl-3-methylimmidazolium trifluoromethanesulphonate and reverse microemulsions of Triton X-100

description: Electrodeposition of iron (Fe) was investigated in three different media:
 namely, a hydrophilic ionic liquid (IL), 1-ethyl-3-methylimmidazolium
 trifluoromethanesulphonate, conventional reverse microemulsion
 (RME)/reverse micellar solution, and IL based reverse microemulsion of a
 non-ionic surfactant, Triton X-100 with a view to achieving control over
 size, shape, and morphology of the electrodeposited iron. Electrochemical
 behavior of Fe2+ was studied using cyclic voltammetric technique with a
 copper electrode as the working electrode. Electrochemical reduction of
 Fe2+ in all the studied media was found to be an electrochemically
 irreversible, diffusion-controlled process. Successful potentiostatic
 electrodeposition of metallic iron was performed in all the studied media
 on copper substrate using bulk electrolysis method. The obtained iron
 electrodeposits were characterized using a scanning electron microscope
 (SEM) and an x-ray diffractometer (XRD). The controlled diffusion of Fe2+
 towards electrode surface in all the media resulted in the formation of
 nanoparticles of iron, but compact layers of granular nanoparticles could
 be achieved from both the conventional and IL based RME systems. The IL
 based microemulsions synergistically combined the advantageous features of
 both the IL and RME and showed the prospect of tuning the size, shape, and
 morphology of the electrodeposited iron.
description: Measurements using an Electrochemical Workstation
 Processed using SigmaPlot 11 and converted to CSV
description: # Data from: Electrodeposition of iron from 1-ethyl-3-methylimmidazolium
 trifluoromethanesulphonate and reverse microemulsions of Triton X-100 ---
 The electrochemical measurements and electrodeposition were carried out
 with a computer-controlled electrochemical analyzer (Model: CHI 660E and
 CHI 760E, CH Instruments, Inc., USA) using a conventional
 single-compartment three-electrode cell. Prior to each measurement, the
 solution was purged with nitrogen gas to maintain an inert atmosphere
 during the course of the measurement. A homemade copper disc electrode (d
 = 1 mm) was used as the working electrode during cyclic voltammetric
 measurements. The electrode was mechanically polished using 0.05 m alumina
 paste (Buehler, country) to obtain a uniform surface and then rinsed
 thoroughly with distilled water and dried. The dried electrode was then
 introduced into the cell filled with the test solution. A platinum (Pt)
 wire was used as the counter electrode. A Ag/AgCl was used as the
 reference electrode in the conventional RMEs, while a Ag wire was used in
 the IL and IL-RME systems. The Ag/AgCl reference electrode used in the
 conventional RMEs was found to be fairly stable during the course of the
 experiments which was judged by comparing the cyclic voltammograms
 performed at different time intervals. Metallic iron deposits were
 obtained on a copper substrate (d = 6 mm) with bulk electrolysis by
 applying constant potential using the same three-electrode
 single-compartment cell used for cyclic voltammetric measurements. The
 crystalline structure of the deposits was investigated by an x-ray
 diffractometer (Rigaku Smartlab SE, Japan). ## Description of the data and
 file structure Data from cyclic volttamograms (current, potential at
 different scan rates) were used for the plots for Fig. 1, 1 (a), (b),5
 (a), (b), 6(a), (b), 7(a), (b) and S1. Intensity at different diffraction
 angles were used from XRD pattern for Fig. 4. **Fig. 1** Cyclic
 voltammograms of 10 mM FeSO4 in [emim][TfO] at different scan rates on a
 copper electrode at 30 oC. The solid black line shows the cyclic
 voltammogram in neat [emim][TfO].  **Fig. 2** (a) Variation of cathodic
 peak potentials with the logarithms of scan rates and (b) Variation of
 cathodic peak currents with the squire root of scan rates for the cyclic
 voltammogram of 10 mM FeSO4 in [emim][TfO] on a copper electrode at 30 oC.
 **Fig. 4** XRD pattern of iron deposit obtained by potentiostatic
 electrolysis at -0.6 V for 1 h on a copper substrate in [emim][TfO]
 containing 10 mM FeSO4. **Fig. 5** Cyclic voltammograms of (a) 3 mM FeSO4
 in RME of TX-100, (b) 20 mM FeSO4 in IL based RME of TX-100 at different
 scan rates on a copper electrode at 30 oC. **Fig. 6** Variation of
 cathodic peak potentials with the logarithms of scan rates for the cyclic
 voltammograms of (a) 3 mM FeSO4 in conventional RME of TX-100 and (b) 20
 mM FeSO4 in IL-RME of TX-100 on a copper electrode at 30 oC. **Fig. 7**
 Variation of cathodic peak currents with the squire root of scan rates for
 the cyclic voltammograms of (a) 3 mM FeSO4 in conventional RME of TX-100
 and (b) 20 mM FeSO4 in IL-RME of TX-100 on a copper electrode at 30 oC.
 **Figure S1:** Cyclic voltammograms of 80 mM FeSO4 in aqueous medium
 containing Na2SO4 as supporting electrolyte at different scan rates on a
 copper electrode at 30 oC. The solid black line shows the cyclic
 voltammogram in the absence of FeSO4. ## Sharing/Access information All
 data are accessible through the shared datasets ## Code/Software SigmaPlot
 11 software will be required to access the data. Extension of fil i .JNB.
 The Supplementary information is available as a word file with the dataset
 for Fig. S1 made available. CSV files will allow free acees and therefore
 these files are also added.