In-situ twin-electrode spectrocyclic voltammetry with a cell composed of a pair of Nafion®-coated indium tin oxide electrodes each incorporating Ru(bpy)32+ and methylviologen

Toshikazu Onikubo, Lin Ru-Jang, Masao Kaneko

研究成果: 雜誌貢獻文章同行評審

13 引文 斯高帕斯(Scopus)

摘要

Electrochemical redox reactions in a twin-electrode (TE) type cell composed of a couple of Nafions®-coated indium tin oxide (ITO) electrodes each incorporating Ru(bpy)32+ and methylviologen (MV2+) were analyzed by in-situ spectrocyclic voltammetry. The cell system, ITO/Nafion®[Ru(bpy)32+]/aqueous electrolyte/Nafion[MV2+]/ITO, showed changes in visible absorption spectra induced by cyclic scanning of the potential difference between the two ITO electrodes. The spectral changes were attributed to the redox reactions of Ru(bpy)33+/2+ and MV2+/+· showing a multicolor electrochromism. The potential difference (+ 1.73 V) of the major redox wave in the cyclic voltammogram (CV) of the TE cell were close to the values (+ 1.76 V) calculated from the redox potentials of each species. Small peaks in the TE-CV suggested side reactions with H2O and O2, as well as migrations of the redox compounds into the opposite membranes. When each redox membrane was precycled repeatedly in an aqueous electrolyte solution, before fabricating a TE cell, the cell showed very stable behavior after repeated cyclic scanning. It has been shown that the present in-situ TE spectrocyclic voltammetry is useful for studying reactions occurring in practical devices.

原文英語
頁(從 - 到)143-148
頁數6
期刊Journal of Electroanalytical Chemistry
361
發行號1-2
DOIs
出版狀態已發佈 - 1993 十二月 15

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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