IMPEDANCE CHARACTERISTICS OF PLATINUM-ELECTRODES ON YTTRIA-STABILIZED ZIRCONIA

被引：29

作者：

VANHERLE, J

MCEVOY, AJ

机构：

来源：

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1993年 / 97卷 / 03期

关键词：

CHEMICAL KINETICS; ELEMENTARY REACTIONS; INTERFACES; SPECTROSCOPY; IMPEDANCE; SOLID ELECTROLYTES;

D O I：

10.1002/bbpc.19930970339

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The impedance response of the cell O2,Pt/(Y2O3)0.06(ZrO2)0.94/Pt,O2 is measured at temperatures between 600 and 850-degrees-C and oxygen partial pressures between 10(-3) and 1 atm as well as in low vacuum. The experimental data agree very well with those encountered in Reference [1], where surface diffusion of adsorbed oxygen atoms on the platinum electrode, the activity of which obey a Langmuir relationship, is proposed as the rate-determining step. Current treatment as well as hydrogen treatment of the cell irreversibly increase the interface impedance. The measurements in vacuum confirm that gas phase diffusion is not rate-limiting.

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页码：470 / 474

页数：5

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