Electrodeposition of transition metals from highly concentrated solutions of ionic liquids

Caporali, Stefano; Marcantelli, Patrick; Chiappe, Cinzia; Pomelli, Christian Silvio

doi:10.1016/j.surfcoat.2015.01.031

Cited by 31 publications

(20 citation statements)

References 52 publications

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“…This work was carried out to offer proof of concept for electrodeposition from wet ionic liquids. Although not examined experimentally in this work, the literature on electrodeposition of metals from anhydrous ILs [23][24][25][26] suggests that this should be a general phenomenon. More particularly, if this approach should be developed into a technology, we would use cation-selective ILs [27][28][29][30][31][32][33]…”

Section: Discussionmentioning

confidence: 99%

Electrodeposition of metal cations from the wet ionic liquid [EMIM][TFSI]

et al. 2016

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Keyword: electrodeposition, wet ionic liquid, possible application to mining wastes https://mc06.manuscriptcentral.com/cjc-pubs We investigated the deposition of silver, copper, and lead from the ionic liquid 1-11 ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide [EMIM][TFSI] under 12potentiostatic conditions in the presence of water. This was part of a larger project 13 involving the extraction of metal ions from mining waste into an ionic liquid, followed by 14 electrodeposition so that the ionic liquid could be recycled. All three elements were 15 deposited in metallic form by electrolysis in the ionic liquid, and the process was 16

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Section: Discussionmentioning

confidence: 99%

Electrodeposition of metal cations from the wet ionic liquid [EMIM][TFSI]

et al. 2016

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“…Caporali et al applied 1–Butyl–3–methyl–imidazolium bis(trifluoromethylsulfonyl)imide, [bmim][NTf 2 ] (Tf = triflate) for the electrodeposition of a group of transition metals, such as silver, copper, cobalt, nickel, or zinc [ 32 ]. The metal was dissolved in such IL, under conditions suitable for industrial applications, i.e., an uncontrolled (moisture content) atmosphere, and electrochemically characterized by cyclic voltammetry and chronoamperometry.…”

Section: Imidazolium-based Ionic Liquidsmentioning

confidence: 99%

“…In this study, Caporali et al [ 32 ] used very simple operating conditions that did not require a rigorously controlled atmosphere. This advantage made the process particularly easy for a potential upgrading for large low-cost applications.…”

Section: Imidazolium-based Ionic Liquidsmentioning

confidence: 99%

Application of Ionic Liquids in Electrochemistry—Recent Advances

2020

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In this review, the roles of room temperature ionic liquids (RTILs) and RTIL based solvent systems as proposed alternatives for conventional organic electrolyte solutions are described. Ionic liquids are introduced as well as the relevant properties for their use in electrochemistry (reduction of ohmic losses), such as diffusive molecular motion and ionic conductivity. We have restricted ourselves to provide a survey on the latest, most representative developments and progress made in the use of ionic liquids as electrolytes, in particular achieved by the cyclic voltammetry technique. Thus, the present review comprises literature from 2015 onward covering the different aspects of RTILs, from the knowledge of these media to the use of their properties for electrochemical processes. Out of the scope of this review are heat transfer applications, medical or biological applications, and multiphasic reactions.

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“…26,27 For metal ions in ILs, solvation properties and their role in determining the electrodeposition process, however, are much less well-understood. In particular, despite that the electrodeposition of the silver ion in ILs has been extensively investigated, [21][22][23][24][25]28 solvation properties of the ion in the liquids have been largely unexplored.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Recently, ILs have been increasingly utilized as electrolytes for the electrodeposition of metals. − This process is historically carried out in aqueous solutions due to their high solubility of metal salts, high conductivity, and low viscosity; however, liquid water has an intrinsic relatively narrow potential window, which is defined by hydrogen and oxygen evolution, and thus could not be employed to obtain metals having large negative redox potentials . Compared to aqueous solutions, ILs offer several advantages, including significantly larger potential windows than water, and tunable physicochemical properties through appropriate choice of the cations and anions, which enables controlled redox potentials for electrodeposition processes. − In this regard, extensive studies of the electrodeposition of several important metals, such as silver and copper, have been reported for a variety of ILs. − …”

Section: Introductionmentioning

confidence: 99%

Solvation Properties of Silver and Copper Ions in a Room Temperature Ionic Liquid: A First-Principles Study

et al. 2018

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Understanding the behavior of metal ions in room temperature ionic liquids (ILs) is essential for predicting and optimizing performance for technologies like metal electrodeposition; however, many mechanistic details remain enigmatic, including the solvation properties of the ions in ILs and how they are governed by the intrinsic interaction between the ions and the liquid species. Here, we utilize first-principles molecular dynamics simulations to unravel and compare the key structural properties of Ag+ and Cu+ ions in a common room temperature IL, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate. We find that, when compared to Cu+, the larger Ag+ shows a more disordered and flexible solvation structure with a more frequent exchange of the IL species between its solvation shells. In addition, our simulations reveal an interesting analog in the solvation behavior of the ions in the IL and aqueous environments, particularly in the effect of the ion electronic structures on their solvation properties. This work provides fundamental understanding of the intrinsic properties of the metal ions in the IL, while offering mechanistic understanding and strategy for future selection of ILs for metal electrodeposition processes.

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Electrodeposition of transition metals from highly concentrated solutions of ionic liquids

Cited by 31 publications

References 52 publications

Electrodeposition of metal cations from the wet ionic liquid [EMIM][TFSI]

Electrodeposition of metal cations from the wet ionic liquid [EMIM][TFSI]

Application of Ionic Liquids in Electrochemistry—Recent Advances

Solvation Properties of Silver and Copper Ions in a Room Temperature Ionic Liquid: A First-Principles Study

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