Electrocatalysis for dioxygen reduction by a μ-oxo decavanadium complex in alkaline medium and its application to a cathode catalyst in air batteries

Eniya Listiani Dewi, Kenichi Oyaizu, Hiroyuki Nishide, Eishun Tsuchida*

*この研究の対応する著者

研究成果査読

22 被引用数 (Scopus)

抄録

The redox behavior of a decavanadium complex [(V=O) 102-O)93-O) 3(C5H7O2)6] (1) was studied using cyclic voltammetry under acidic and basic conditions. The reduction potential of V(V) was found at less positive potentials for higher pH electrolyte solutions. The oxygen reduction at complex 1 immobilized on a modified electrode was examined using cyclic voltammetry and rotating ring-disk electrode techniques in the 1M KOH solutions. On the basis of measurements using a rotating disk electrode (RDE), the complex 1 was found to be highly active for the direct four-electron reduction of dioxygen at -0.2 V versus saturated calomel electrode (SCE). The complex 1 as a reduction catalyst of O2 with a high selectivity was demonstrated using rotating ring-disk voltammograms in alkaline solutions. The application of complex 1 as an oxygen reduction catalyst at the cathode of zinc-air cell was also examined. The zinc-air cell with the modified electrode showed a stable discharge potential at approximately 1V with discharge capacity of 80mAhg-1 which was about five times larger than that obtained with the commonly used manganese dioxide catalyst.

本文言語English
ページ(範囲)286-290
ページ数5
ジャーナルJournal of Power Sources
130
1-2
DOI
出版ステータスPublished - 2004 5 3

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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