高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (12): 1396.

• 研究论文 • 上一篇    下一篇

钙钛矿型氧化物电极极化过程中的导电特性

周运鸿, 骆培方, 吴智远, 查全性   

  1. 武汉大学化学系, 430072
  • 收稿日期:1989-03-29 出版日期:1990-12-24 发布日期:1990-12-24
  • 通讯作者: 周运鸿
  • 基金资助:

    国家自然科学基金

The Conductive Characteristics of Perovskite Oxide Electrodes Duringthe Polarization Process

Zhou Yun-hong, Luo Pei-fang, Wu Zhi-yuan, Zha Quan-xing(Cha Chuansin)   

  1. Departent of Chemistry, Wuhan University, Wuhan, 430072
  • Received:1989-03-29 Online:1990-12-24 Published:1990-12-24

摘要: 研究了La0.5Sr0.5CoO3等钙钛矿型氧化物电极的极化性质及它们对氧电化学还原的催化活性。发现在阴极极化过程中氧化物电极发生还原时,其电催化活性降低,电极阻抗明显增加,而在阳极极化过程中电极阻抗减小。讨论了影响钙钛矿型氧化物导电的因素及电极阻抗变化对电极性能的影响。

关键词: 钙铁矿, 氧化物, 氧电极

Abstract: The polarization of perovskite oxides and their electrocatalytic activity for the oxygen reduction are investigated. It is found that the electrode resistance increases significantly when the reduction of the oxides electrode takes place during the cathodic polarization process with a corresponding drop of eletrocatalytic activity. Whereas the electrode resistance decreases when the reduced oxides are reoxi-dized during the anodic polarization process. The electrode conductivity is reversibly changed. The influence of the electric conduction of perovskite and the effect of the resistance change of the electrode on the performance of the electrode are discussed.

Key words: Perovskite, Oxide, Oxygen electrode

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