Voltammetric studies of gold, protons, and [HCl2]- in ionic liquids

Leigh Aldous; Debbie S. Silvester; William R. Pitner; Richard G. Compton; M. Cristina Lagunas; Christopher Hardacre

doi:10.1021/jp0709555

Voltammetric studies of gold, protons, and [HCl₂]^- in ionic liquids

Leigh Aldous, Debbie S. Silvester, William R. Pitner, Richard G. Compton, M. Cristina Lagunas^*, Christopher Hardacre

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The comparative study of the voltammetry of H[NTf₂], HCl and H[AuCl₄] in [C₄mim][NTf₂] has provided an insight into the influence of protons on the reduction of [AuCl ₄]^- at Au, Pt or glassy carbon (GC) electrodes, and has allowed the identification of an unprecedented proton-induced electroless deposition of Au on relatively inert GC surfaces. For the first time, clear evidence of the quantitative formation of [HCl₂]^- has been obtained in HCl/[C₄mim] [NTf₂] mixtures, and the electrochemical behavior of these mixtures analyzed. In particular, a significant shift of the dissociation equilibrium toward the formation of chloride and the solvated proton (H_IL ⁺), following electrochemical reduction of H_IL ⁺ has been observed in the time-scale of the experiments.

Original language	English
Pages (from-to)	8496-8503
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	24
DOIs	https://doi.org/10.1021/jp0709555
Publication status	Published - 21 Jun 2007

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title = "Voltammetric studies of gold, protons, and [HCl2]- in ionic liquids",

abstract = "The comparative study of the voltammetry of H[NTf2], HCl and H[AuCl4] in [C4mim][NTf2] has provided an insight into the influence of protons on the reduction of [AuCl 4]- at Au, Pt or glassy carbon (GC) electrodes, and has allowed the identification of an unprecedented proton-induced electroless deposition of Au on relatively inert GC surfaces. For the first time, clear evidence of the quantitative formation of [HCl2]- has been obtained in HCl/[C4mim] [NTf2] mixtures, and the electrochemical behavior of these mixtures analyzed. In particular, a significant shift of the dissociation equilibrium toward the formation of chloride and the solvated proton (HIL +), following electrochemical reduction of HIL + has been observed in the time-scale of the experiments.",

author = "Leigh Aldous and Silvester, {Debbie S.} and Pitner, {William R.} and Compton, {Richard G.} and Lagunas, {M. Cristina} and Christopher Hardacre",

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doi = "10.1021/jp0709555",

language = "English",

volume = "111",

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journal = "Journal of Physical Chemistry C",

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T1 - Voltammetric studies of gold, protons, and [HCl2]- in ionic liquids

AU - Aldous, Leigh

AU - Silvester, Debbie S.

AU - Pitner, William R.

AU - Compton, Richard G.

AU - Lagunas, M. Cristina

AU - Hardacre, Christopher

PY - 2007/6/21

Y1 - 2007/6/21

N2 - The comparative study of the voltammetry of H[NTf2], HCl and H[AuCl4] in [C4mim][NTf2] has provided an insight into the influence of protons on the reduction of [AuCl 4]- at Au, Pt or glassy carbon (GC) electrodes, and has allowed the identification of an unprecedented proton-induced electroless deposition of Au on relatively inert GC surfaces. For the first time, clear evidence of the quantitative formation of [HCl2]- has been obtained in HCl/[C4mim] [NTf2] mixtures, and the electrochemical behavior of these mixtures analyzed. In particular, a significant shift of the dissociation equilibrium toward the formation of chloride and the solvated proton (HIL +), following electrochemical reduction of HIL + has been observed in the time-scale of the experiments.

AB - The comparative study of the voltammetry of H[NTf2], HCl and H[AuCl4] in [C4mim][NTf2] has provided an insight into the influence of protons on the reduction of [AuCl 4]- at Au, Pt or glassy carbon (GC) electrodes, and has allowed the identification of an unprecedented proton-induced electroless deposition of Au on relatively inert GC surfaces. For the first time, clear evidence of the quantitative formation of [HCl2]- has been obtained in HCl/[C4mim] [NTf2] mixtures, and the electrochemical behavior of these mixtures analyzed. In particular, a significant shift of the dissociation equilibrium toward the formation of chloride and the solvated proton (HIL +), following electrochemical reduction of HIL + has been observed in the time-scale of the experiments.

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 24

ER -

Voltammetric studies of gold, protons, and [HCl₂]^- in ionic liquids

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