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无机材料学报

无机材料学报

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ZrO2高温固态电极交换电流密度的研究

鲁雄刚; 李福燊; 李丽芬; 周国治   

  1. 北京科技大学物理化学系; 北京100083
  • 收稿日期:1996-08-12 修回日期:1996-10-08 出版日期:1997-08-20 网络出版日期:1997-08-20

A Study on Exchange Current Density of ZrO2 Solid Electrode at High Temperature

LU Xiouggang; LI Fushen; LI Lifen; CHOU Kouchih   

  1. Department of Physical Chemistry University of Science Technology Beijing Beijing100083 China
  • Received:1996-08-12 Revised:1996-10-08 Published:1997-08-20 Online:1997-08-20

PDF (PC)

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摘要： 利用对称电池M，MxOy|ZrO2（MgO）|M，MxOy在高温下对固态参比电极的极化特征进行了研究．实验研究表明，在本实验的条件下，极化电流与超电势之间为线性关系．Mo／MoO2参比电极的交换电流密度远大于Cr／Cr2O3、Ni／NiO、Co／CoO参比电极的交换电流密度．电极交换电流密度随参比电极中金属含量的增加及温度的升高而增大．根据实验测试得到了电极反应的活化能．

关键词: 氧化锆, 固态参比电极, 交换电流密度

Abstract: A kind of symmetrical electrochemical cell of the type M, MxOy|ZrO2(MgO)| M, MxOy was used to study the polarization characteristic of solid state reference
electrodes at high temperature. Experimental results show that the variation of overpotential with polarization current is linear. The exchange current
desities for the Mo/MoO2, Cr/Cr2O3, Ni/Ni/O and Co/CoO electrodes, in the order named, are decreasing. The exchange current densities of all kinds of
electrodes are also increasing with the increase of metal ratio in reference electrodes and temperature. The activation energy of the electrode reactions was calculated.

Key words: zirconina, solid state reference electrode, exchange current density