Towards Understanding the Hydrocarbon Oxidation Activity of Oxides for Direct Hydrocarbon SOFC Anodes

被引：0
|
作者：
McIntosh, S. [1 ,2 ]
van den Bossche, M. [2 ]
机构：
[1] Lehigh Univ, Dept Chem Engn, Bethlehem, PA 18015 USA
[2] Univ Virginia, Dept Chem Engn, Charlottesville, VA 22904 USA
来源：
SOLID OXIDE FUEL CELLS 12 (SOFC XII) | 2011年 / 35卷 / 01期
基金：
美国国家科学基金会;
关键词：
FUEL-CELLS; CATHODES;
D O I：
10.1149/1.3570277
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In this work we have developed a novel pulse reactor technique to study the methane oxidation activity of La0.75Sr0.25Cr0.5Mn0.4X0.1O3-delta (X=Co, Fe, Ni, V, Mn), and the double-perovskite Sr2MgMoO3-delta (SMMO) as a function of lattice oxygen stoichiometry under SOFC anode conditions. The oxidation activity and selectivity towards total oxidation products both decrease with decreasing oxygen stoichiometry for all of the materials tested. The difference in activity between materials is related to the catalytic activity of the B-site cations and the availability of oxygen for reaction (i.e. the reducibility of the underlying bulk lattice). These findings are used to interpret the non-linear electrochemical response of an La0.75Sr0.25Cr0.5Mn0.5O3-delta based SOFC anode upon increasing cell current density.
引用
收藏
页码：2781 / 2788
页数：8
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