The effect of the electrode material on the electrodeposition of zinc from deep eutectic solvents

Vieira, Luciana; Schennach, Robert; Gollas, Bernhard

doi:10.1016/j.electacta.2015.11.030

Cited by 67 publications

(45 citation statements)

References 49 publications

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“…1) in blank reline on Pt, which have also been reported a number of times in previous papers. 3,5,15 As the potential (E) becomes more negative from the open circuit potential (E ocp ), two pre-waves (C 1 , C 2 ) appear prior to the cathodic current due to the bulk breakdown of the electrolyte. It is interesting to note that in earlier work, 4 we observed the similar pre-waves in reline on steel.…”

Section: Resultsmentioning

confidence: 99%

Voltammetric Response of Water in Deep Eutectic Solvent Based on Choline Chloride and Urea

Bučko¹,

Roy

Valverde-Armas

et al. 2018

J. Electrochem. Soc.

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This work investigates the electrochemical role of water in the research of deep eutectic solvent (DES) based on urea and choline chloride. The motivation comes from the growing use of this DES, and on reports where a characteristic voltammetric cathodic pre-wave is observed. However, there has been no direct study to verify if such interpretation of the pre-wave is appropriate. In this regard, cyclic voltammetry has been used in this paper to interrogate the reactions inducing the appearance of the pre-wave. These experiments have been carried out using reline (the eutectic mixture of urea and choline chloride) melts containing different amounts of water, compounds which can be incorporated as impurities from air, or as decomposition products of reline. The analyses showed that a pre-wave in voltammograms in reline originates from water electroreduction accompanied with a subsequent choline hydroxide formation. In this sense, reline behaves like a typical mixture of organic solvent + alkali cation salt + water. The voltammetric signal depends on water content in reline. Importantly, this offers a possibility for in-situ electrochemical determination of water content in reline, provided that a calibration curve is constructed.

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Section: Resultsmentioning

confidence: 99%

Voltammetric Response of Water in Deep Eutectic Solvent Based on Choline Chloride and Urea

Bučko¹,

Roy

Valverde-Armas

et al. 2018

J. Electrochem. Soc.

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“…Whereas blockingo ft he glassy carbon surface by an adsorbed layer of choline ions wasr eported to play ar olei nt he electrodeposition of zinc, [39][40][41] the reduction potentials for Sn II and Bi III are significantly more positive than those reported for surfaceb locking( %À2.0 Vand below). Hence, blockinge ffects such as those reported during the electrodeposition of zinc from the same electrolyte can be dismissed in the potential range of À1.5 to + 1.0 Vv ersus Ag wire used here for Sn and Bi.…”

Section: Deposition Of Elemental Sn and Bimentioning

confidence: 89%

Tin, Bismuth, and Tin–Bismuth Alloy Electrodeposition from Chlorometalate Salts in Deep Eutectic Solvents

et al. 2017

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The electrodeposition of tin, bismuth, and tin–bismuth alloys from SnII and BiIII chlorometalate salts in the choline chloride/ethylene glycol (1:2 molar ratio) deep eutectic solvent was studied on glassy carbon and gold by cyclic voltammetry, rotating disc voltammetry, and chronoamperometry. The SnII‐containing electrolyte showed one voltammetric redox process corresponding to SnII/Sn0. The diffusion coefficient of [SnCl3]−, detected as the dominating species by Raman spectroscopy, was determined from Levich and Cottrell analyses. The BiIII‐containing electrolyte showed two voltammetric reduction processes, both attributed to BiIII/Bi0. Dimensionless current/time transients revealed that the electrodeposition of both Sn and Bi on glassy carbon proceeded by 3D‐progressive nucleation at a low overpotential and changed to instantaneous at higher overpotentials. The nucleation rate of Bi on glassy carbon was considerably smaller than that of Sn. Elemental Sn and Bi were electrodeposited on Au‐coated glass slides from their respective salt solutions, as were Sn–Bi alloys from a 2:1 SnII/BiIII solution. The biphasic Sn–Bi alloys changed from a Bi‐rich composition to a Sn‐rich composition by making the deposition potential more negative.

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“…[144][145][146][147][148][149] In 2008, the first example of using DESs in biocatalysis was reported by Kazlauskas et al, 144 who investigated the activity of enzymes in the transesterification of ethyl valerate with butanol, showing that these enzymes were stable in ChCl-U. ChCl-U, ChCl-EG Zinc [163][164][165][166][167][168][169][170][171] ChCl-U, ChCl-EG Cobalt [172][173][174][175][176] ChCl-U, ChCl-EG Nickel 175,177,178 ChCl-U, ChCl-EG, ChCl-MA Ferrocene 155,179 ChCl-EG Tin 180 ChCl-U Gallium 158 ChCl-EG Chromium 174 ChCl-EG Silver 181 ChCl-U Indium 182 ChCl-U, ChCl-EG, ChCl-1,2 PD, ChCl-1,3-PD, ChCl-TU a Mercury 183 a Acronyms: ChDC, Choline dihydrogencitrate; TU, Thiourea.…”

Section: Biotransformation In Dessmentioning

confidence: 99%

Deep eutectic solvents: designer fluids for chemical processes

Wazeer

Hayyan

Hadj-Kali

2017

J of Chemical Tech & Biotech

110

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The increasing demand for multi‐task green solvents has spurred the development of next‐generation liquid media such as deep eutectic solvents (DESs), which have recently attracted increased attention. DESs are mixtures of salts and complexing agents, having freezing points lower than those of starting individual components. Similarly to ionic liquids, DESs exhibit distinctive properties such as chemical and thermal stability, biodegradability, non‐flammability, and cost effectiveness. These features account for their wide range of applications, e.g. as extractants, reactants, catalysts, reaction media, additives, and lubricants. This review summarizes the recent research efforts directed at exploring the potential applications of DESs in various chemical processes. With the rapid publication of reports on this new generation of solvents, other roles also are expected to be seen sooner or later. © 2017 Society of Chemical Industry

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The effect of the electrode material on the electrodeposition of zinc from deep eutectic solvents

Cited by 67 publications

References 49 publications

Voltammetric Response of Water in Deep Eutectic Solvent Based on Choline Chloride and Urea

Voltammetric Response of Water in Deep Eutectic Solvent Based on Choline Chloride and Urea

Tin, Bismuth, and Tin–Bismuth Alloy Electrodeposition from Chlorometalate Salts in Deep Eutectic Solvents

Deep eutectic solvents: designer fluids for chemical processes

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