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Electrochemical behaviour of Cu(II)/Cu(I) redox couple in 1-hexyl-3-methylimidazolium chloride ionic liquid
K. Shakeela, A. Sri Dithya,
Published in Springer India
2015
Volume: 127
   
Issue: 1
Pages: 133 - 140
Abstract
The electrochemical behaviour of Cu(II)/Cu(I) redox couple in 1-hexyl-3-methylimidazolium chloride (C6mimCl) ionic liquid was studied using glassy carbon electrode at 375 K by cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopy. In this electrochemical study, we have made an attempt to avoid the problem of water contamination in hygroscopic C6mimCl ionic liquid by setting the temperature at 375 K without glove box. This high temperature cyclic voltammetric study revealed two-step one electron reductions of Cu(II) to Cu(I) followed by Cu(I) to Cu metal. The reduction of Cu(II) to Cu(I) was found to be quasi-reversible at 375 K. The diffusion coefficients of Cu(II) and Cu(I), and the charge transfer rate constant of Cu(II) in C6mimCl were estimated by Randles-Ševčik equation and Nicholson's method, respectively, and found to be consistent with the quasi-reversible process. Further, constant potential electrodeposition of metallic copper was carried out on a stainless steel electrode at 375 K and the deposit was characterised by X-ray diffraction and electron microscopy. [Figure not available: see fulltext.] © 2015 Indian Academy of Sciences.
About the journal
JournalData powered by TypesetJournal of Chemical Sciences
PublisherData powered by TypesetSpringer India
ISSN09743626
Open AccessYes
Concepts (27)
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    Charge transfer
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    Chlorine compounds
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    Copper
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    Cyclic voltammetry
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    Diffusion
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    Electrochemical corrosion
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    Electrochemical electrodes
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    Electrochemical impedance spectroscopy
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    Electrodeposition
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    Electrodes
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    Glass membrane electrodes
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    Glassy carbon
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    Ionic liquids
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    Liquids
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    Rate constants
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    Stainless steel
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    Water pollution
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    X ray diffraction
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    1-HEXYL-3- METHYLIMIDAZOLIUM CHLORIDES
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    ELECTROCHEMICAL BEHAVIOUR
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    Electrochemical studies
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    Glassy carbon electrodes
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    One-electron reductions
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    QUASI-REVERSIBLE
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    QUASI-REVERSIBLE PROCESS
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    STAINLESS STEEL ELECTRODE
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    Reduction