Electrochemical studies of Tin in Zinc chloride-1-ethyl-3-methylimidazolium chloride ionic liquids

Jing Fang Huang, I. Wen Sun

研究成果: Article同行評審

50 引文 斯高帕斯(Scopus)

摘要

The electrochemistry of tin at polycrystalline tungsten and at glassy carbon (GC) electrodes was investigated in acidic and basic zinc chloride-1-ethyl-3-methyl-imidazolium chloride (ZnCl2-EMIC) ionic liquids at 90°C. The electrodissolution of Sn produces a Sn(II) solution, which can be either oxidized to Sn(IV) or reduced to Sn metal. The formal potentials of the Sn(II)/Sn(0) couple in the 40.0-60.0 and 25.0-75.0 mol % ionic liquids are 0.25 and -0.24 V, respectively, vs. Zn(II)/Zn in a 50.0-50.0 mol % ionic liquid. The formal potentials of the Sn(IV)/Sn(II) couple in the 40.0-60.0 and 25.0-75.0 mol % ionic liquids are 0.78 and 0.29 V, respectively. The electrodeposition of Sn from Sn(II) at both electrodes is complicated by nucleation. Experimental current-time transients recorded at these electrodes are in good agreement with the theoretical model based on 3D nucleation. Sampled-current voltammograms constructed from chronoamperometric experiments indicated that the reduction of Sn(II) to Sn metal in the acidic ionic liquid is hindered by the adsorption of Sn(II) at tungsten, nickel, and GC electrodes. In the acidic ionic liquid, the adsorption of Sn(II) also hindered the voltammetric oxidation of Sn(II) to Sn(IV) at the tungsten electrode but not at the GC electrode. In the basic ionic liquid, however, the adsorption of Sn(II) at these electrodes is not observed. When the deposition potential was extended to the range where Zn(II) reduction occurred, coatings of Sn-Zn codeposits could be obtained. The Sn-Zn codeposits consist of a two-phase mixture of Sn and Zn. The effects of deposition potential and Sn(II) concentration on the Sn-Zn codeposits composition were investigated.

原文English
頁(從 - 到)E299-E306
期刊Journal of the Electrochemical Society
150
發行號6
DOIs
出版狀態Published - 2003 七月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 可再生能源、永續發展與環境
  • 表面、塗料和薄膜
  • 電化學
  • 材料化學

指紋

深入研究「Electrochemical studies of Tin in Zinc chloride-1-ethyl-3-methylimidazolium chloride ionic liquids」主題。共同形成了獨特的指紋。

引用此