Studies on Co-based catalysts supported on modified carbon substrates for PEMFC cathodes

被引：152

作者：

Subramanian, Nalini P.

Kumaraguru, Swaminatha P.

Colon-Mercado, Hector

Kim, Hansung

Popov, Branko N. ^{[1
]}

Black, Timothy

Chen, Donna A.

机构：

[1] Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA

[2] Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA

[3] Yonsei Univ, Dept Chem Engn, Seoul, South Korea

来源：

JOURNAL OF POWER SOURCES | 2006年 / 157卷 / 01期

关键词：

PEM fuel cells; oxygen reduction; non-noble metal catalyst; electrocatalysis; carbon activation;

D O I：

10.1016/j.jpowsour.2005.07.031

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：

Cobalt based non-precious metal catalysts were prepared by supporting cobalt-ethylene diamine complex on carbon followed by a heat treatment at elevated temperatures (800 degrees C). Surface oxygen groups on carbon were introduced with HNO3 oxidation. Co catalysts supported on oxidized carbon showed improved activity and selectivity towards four-electron reduction of molecular oxygen. Quinone groups introduced by nitric acid treatment, in addition to increasing the dispersion of the chelate complexes, play a role in forming the active site for oxygen reduction. (c) 2005 Elsevier B.V All rights reserved.

引用

页码：56 / 63

页数：8

共 37 条

[1] TRANSITION-METAL CLUSTER MATERIALS FOR MULTI-ELECTRON TRANSFER CATALYSIS [J].