Electrochemical study of cadmium in acidic zinc chloride-1-ethyl-3-methylimidazolium chloride ionic liquids

Jing Fang Huang, I. Wen Sun

研究成果: Article同行評審

41 引文 斯高帕斯(Scopus)

摘要

The electrochemistry of Cd(II) was studied with voltammetry and chronoamperometry at polycrystalline Pt, Ni, and W electrodes in the acidic zinc chloride-1-ethyl-3-methylimidazolium chloride (ZnCl2-EMIC) ionic liquid. Cd(II) could be reduced to cadmium metal via a single-step quasi-reversible electron-transfer process. The redox potential of the Cd(II)/Cd couple shifted negatively as the acidity of the ionic liquid decreased. In addition, underpotential deposition of Cd was observed at Pt and Ni electrodes. This was related to the work function of these metals. Analysis of the chronoamperometric transient behavior revealed a three-dimensional instantaneous nucleation/growth process for the electrodeposition of pure Cd at both Pt and W substrates. When the deposition potential was extended to the potential range where Zn(II) reduction occurred, codeposition of Zn with Cd became possible. The dependency of the Cd-Zn codeposits composition on the deposition potential, temperature, and Cd(II) concentration was investigated.

原文English
頁(從 - 到)E348-E355
期刊Journal of the Electrochemical Society
149
發行號9
DOIs
出版狀態Published - 2002 九月

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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