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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Pt/ZrO2电极的极化机制

夏风; 钱晓良; 杨欣; 刘光葵; 孙尧卿   

  1. 华中科技大学材料科学及工程学院 武汉 430074
  • 收稿日期:2000-08-14 修回日期:2000-10-12 出版日期:2001-09-20 网络出版日期:2001-09-20

Study on Polarization Mechanism of Pt/ZrO2 Electrode

XIA Feng; QIAN XiaO-Liang; YANG Xin; LIU Guang-Kui; SUN Yao-Qing   

  1. Department of Material Science and Engineering; Huazhong University of Science and Technology; Wuhan 430074; China）;
  • Received:2000-08-14 Revised:2000-10-12 Published:2001-09-20 Online:2001-09-20

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摘要： 用“三电极”法测量 Ｐｔ／ＺｒＯ２电极的过电位，利用反应级数分析和多步骤反应理论寻找电极的极化机制，发现Ｐｔ／ＺｒＯ２电极在４００～６００℃温度范围内的极化机制为自由电子由电极材料铂向ＺｒＯ２表层的传输过慢．

关键词: Pt, ZrO2, 电极, 氧传感器

Abstract: The polarization curves of Pt/ZrO2 electrode were measured with three electrode method . The multi-step reaction theory and reaction class analysis were applied in analyzing the electrode reaction mechanism, and it was found that the slow electron transportation between Pt and ZrO2 became the rate determining step under the temperature between 400℃ and 600℃.

Key words: Pt, ZrO2, electrode, oxygen sensor

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