Electrochemical Reduction of Oxygen and Nitric Oxide at Low Temperature on La1-xSrxFeO3-δ Cathodes

被引：10
|
作者：
Hansen, K. Kammer [1 ]
机构：
[1] Tech Univ Denmark, Dept Energy Convers & Storage, DK-4000 Roskilde, Denmark
来源：
ELECTROCATALYSIS | 2014年 / 5卷 / 03期
关键词：
NO; O-2; LSF; YTTRIA-STABILIZED ZIRCONIA; ALTERNATING-CURRENT ELECTROLYSIS; DEFECT STRUCTURE; ELECTRONIC CONDUCTIVITY; SEEBECK COEFFICIENT; PART I; NO; DECOMPOSITION; DIFFUSION; TRANSPORT;
D O I：
10.1007/s12678-014-0192-3
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：
A series of six strontium-substituted lanthanum ferrites (La1-xSrxFeO3-delta, x = 0.00, 0.05, 0.15, 0.25, 0.35, and 0.50) were synthesized using the glycine-nitrate process and evaluated as cathodes for the electrochemical reduction of oxygen and nitric oxide in the temperature range 200 to 400 degrees C, using cone-shaped electrodes and cyclic voltammetry. It was shown that the ferrites had a higher activity towards the electrochemical reduction of nitric oxide than towards the electrochemical reduction of oxygen, in the investigated temperature range. The highest activity towards the electrochemical reduction of nitric oxide was found for La0.95Sr0.05FeO3-delta at 400 degrees C. This compound also showed the highest activity towards the electrochemical reduction of oxygen at 400 degrees C. The highest apparent selectivity was found for the compound LaFeO3 at 200 degrees C. The materials showed ability to oxidize nitric oxide to nitrogen dioxide.
引用
收藏
页码：256 / 261
页数：6
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