摘要
用循环伏安、线性扫描等电化学方法研究了Ｐｔ／ＹＳＺ固体电解质界面的电化学行为，发现氧在Ｐｔ上的电化学吸附过程是Ｔｅｍｋｉｎ吸附过程，吸附量随时间对数增加。吸附氧的阴极还原是不可逆的过程。通过研究获得吸附氧阴极还原过程的电荷传递系数、Ｔｅｍｋｉｎ系数等重要参数。
Electrochemical behavior of the Pt/YSZ solid electrolyre interface has been investigated by cyclic voltammetry and linear potential sweep technique. It was found that the electrochemical adsorption of oxygen on the Pt surface follows the Temkin adsorption model. The amount of oxygen species increases logarithmically with time. Two oxygen species are electrochemically formed on the Pt surface. One is atomically adsorbed, the other probably subsurface oxygen or Pt oxide. The electrochemical reduction of adsorbed oxygen is kinetically irreverable. The cathodic peak potential is affected both by the potential sean rate and the amount of oxygen ahorbed on the surface. Kinetic parameters, such as, cathodic charge transfer coeffcient, Temkin parameter have been extracted.
出处
《电化学》
CAS
CSCD
1996年第1期32-40,共9页
Journal of Electrochemistry
关键词
固体电解质
电化学动力学
铂
YSZ
Pt electrodes, YSZ solid electrolyte, Electrochemical kinetics
