DOUBLE-LAYER CAPACITANCE OF POROUS PLATINUM-ELECTRODES IN ZIRCONIA ELECTROCHEMICAL-CELLS

被引：74

作者：

ROBERTSON, NL ^{[1
]}

MICHAELS, JN ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1991年 / 138卷 / 05期

关键词：

D O I：

10.1149/1.2085814

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The capacitance of the double layer at the interface between porous platinum electrodes and yttria-stabilized zirconia has been measured by potential step chronoamperometry. The capacitance is independent of oxygen partial pressure and electrode potential and increases from 0.2-mu-F/cm2 at 555-degrees-C to 1.3-mu-F/cm2 at 695-degrees-C. These values are at least an order of magnitude smaller than capacitances extracted from the low-frequency portion of ac impedance spectra. This indicates that the capacitive behavior of platinum electrodes in zirconia cells is dominated by time-dependent faradaic processes.

引用

页码：1494 / 1499

页数：6

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