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
收藏
页码：B1004 / B1021
页数：18
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