高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (2): 172.

• 研究论文 • 上一篇    下一篇

一种新型的双功能氧电极材料—Pb-Sb-Ru焦绿石型复合氧化物的合成及其性能研究

杨毅夫, 周运鸿, 查全性   

  1. 武汉大学化学系
  • 收稿日期:1988-05-03 出版日期:1990-02-24 发布日期:1990-02-24
  • 通讯作者: 杨毅夫

A Study on the Synthesis and Performance of a New Type of Bifunctional O2 Electrode Material—Pb-Sb-Ru Pyrochlore Oxides

Yang Yifu, Zhou Yuenhong, Cha Chuanxin   

  1. Department of Chemistry, Wuhan University, Wuhan
  • Received:1988-05-03 Online:1990-02-24 Published:1990-02-24

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摘要： 用溶液共沉淀法合成的比表面高、导电性良好的焦绿石型复合氧化物(Pb2[Ru2-s-ySbxPby]-O7-s),是一种富Pb的氧化物。其良好的导电性来源于Pb、Ru价态的可变性和多种价态的共存。用这种材料制成的多孔电极上得到的氧还原、氧析出稳态极化曲线及寿命实验结果表明,室温下这种氧化物在KOH溶液中,对氧还原及氧析出均具有很好的电催化活性和稳定性。

关键词: 双功能氧电极, 焦绿石型复合氧化物, 电催化

Abstract: Anew method of coprecipitation in aqueous solution for synthesizing pyrochlore oxides with the formula Pb2[Ru2-s-ySbxPby]-O7-s was established. These oxides rich in Pb have a relatively high surface area and a very good electrical conductivity. The good conductivity comes from the changeability of valence of Pb and Ru, and the co-existance of more than one valent states for an element. The polarization curves and life tests for O2 reduction and evolution on the porous electrode made from such materials were measured. The results show that these materials have high electrocatalytical activities and stabilities for both O2 reduction and evolution in a alkaline solution and at room temperature.

Key words: Bifunctional O2 electrode, Pyrochlore oxides, Electrocatalysis

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