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O2,金属电极/YSZ界面的电化学研究

李奇; 孙成文; 王评初; 杨芝洲   

  1. 中国科学院上海硅酸盐研究所; 上海200050
  • 收稿日期:1997-04-30 修回日期:1997-06-05 出版日期:1998-06-20 网络出版日期:1998-06-20

Electrochemical Investigation of Oxygen, Metal/ZrO2 Interface

LI Qi; SUN Cheng-Wen; WANG Ping-Chu; YANG Zhi-Zhou   

  1. Shanghai Institute of Cernmics; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1997-04-30 Revised:1997-06-05 Published:1998-06-20 Online:1998-06-20

摘要: 本文利用交流阻抗和直流极化的电化学方法,比较了200~500℃氧在Pt、Ag、Au、Ag-Pd四种化学镀电极上的扩散,350~600℃氧在金属电极/YSZ界面的电化学反应速度以及阴阳电荷传递系数;计算了350~600℃四种电极的界面阻抗;研究了400℃时O2在Ag-Pd电极界面的交换电流密度Io与氧分压Po2的定量关系.

关键词: 金属电极/YSZ界面, 扩散, 界面电阻

Abstract: A-C Impedance spectroscopy and steady-state D-C polarization have been investigated tocompare oxygen diffusion on Pt, An, Ag, Ag-Pd four pasted electrodes and electrochemical reactionrate from 200℃ to 600℃. Electrode interface impedance has been calculated in the temperaturerange of 350-600℃. Experiments confirm the relationship of the exchange current density Io asa function of oxygen partial pressure P0.67±0.1O2

Key words: O2, metal/YSZ interface, oxygen diffusion, electrochemical reaction rate, electrode interface resistance

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