Modeling Electrochemical Oxidation of Hydrogen on Ni-YSZ Pattern Anodes

被引：129

作者：

Goodwin, David G. ^{[1
]}

Zhu, Huayang ^{[2
]}

Colclasure, Andrew M. ^{[2
]}

Kee, Robert J. ^{[2
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

[2] Colorado Sch Mines, Golden, CO 80401 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2009年 / 156卷 / 09期

关键词：

charge exchange; electrochemical electrodes; hydrogen; nickel compounds; oxidation; solid oxide fuel cells; surface chemistry; yttrium compounds; zirconium compounds; OXIDE FUEL-CELLS; YTTRIA-STABILIZED ZIRCONIA; POLARIZATION CHARACTERISTICS; H2-H2O ATMOSPHERES; CERMET ELECTRODES; TRANSPORT; SURFACE; DIFFUSION; MIXTURES; ZRO2;

D O I：

10.1149/1.3148331

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A computational model is developed to represent the coupled behavior of elementary chemistry, electrochemistry, and transport in the vicinity of solid-oxide fuel cell three-phase boundaries. The model is applied to assist the development and evaluation of H-2 charge-transfer reaction mechanisms for Ni-yttria-stabilized zirconia (YSZ) anodes. Elementary chemistry and surface transport for the Ni and YSZ surfaces are derived from prior literature. Previously published patterned-anode experiments [J. Mizusaki , Solid State Ionics, 70/71, 52 (1994)] are used to evaluate alternative electrochemical charge-transfer mechanisms. The results show that a hydrogen-spillover mechanism can explain the Mizusaki polarization measurements over wide ranges of gas-phase composition with both anodic and cathodic biases.

引用

页码：B1004 / B1021

页数：18

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