A mechanistic study of 4-aminoantipyrine and iron derived non-platinum group metal catalyst on the oxygen reduction reaction

被引：102

作者：

Robson, Michael H. ^{[1
]}

Serov, Alexey ^{[1
]}

Artyushkova, Kateryna ^{[1
]}

Atanassov, Plamen ^{[1
]}

机构：

[1] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA

来源：

ELECTROCHIMICA ACTA | 2013年 / 90卷

关键词：

Fuel cell; ORR; Non-PGM catalyst; Cathode; Mechanism; MEMBRANE FUEL-CELLS; RING-DISK ELECTRODE; FE-BASED CATALYSTS; CATHODE CATALYST; HIGH-PERFORMANCE; PYROLYZED PORPHYRINS; COMPOSITE CATALYSTS; CARBON NANOTUBES; ALKALINE MEDIA; ACTIVE-SITES;

D O I：

10.1016/j.electacta.2012.11.025

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A highly active non-platinum group metal (non-PGM) catalyst derived from iron and 4-aminoantipyrine precursors was synthesized using a sacrificial support method (SSM) to obtain a highly porous, open framed structure. The ratio of iron to 4-aminoantipyrine had been previously optimized to catalyze the reduction of oxygen in both acid and alkaline media. In this study, the mechanism of the reduction of oxygen in both media was investigated, and it was found to follow the 2 x 2 pathway. On its face, electrochemical analysis seems to suggest that the direct 4 electron transfer pathway is favored due to the low peroxide yield, but a closer examination reveals that the 2 x 2 pathway is followed, where the fast step is the partial reduction to peroxide, and the ensuing reduction step to water is also fairly rapid. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：656 / 665

页数：10

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