Nitrogen-modified carbon-based catalysts for oxygen reduction reaction in polymer electrolyte membrane fuel cells

被引：395

作者：

Subramanian, Nalini P. ^{[1
]}

Li, Xuguang ^{[1
]}

Nallathambi, Vijayadurda ^{[1
]}

Kumaraguru, Swaminatha P. ^{[1
]}

Colon-Mercado, Hector ^{[1
]}

Wu, Gang ^{[1
]}

Lee, Jong-Won ^{[1
]}

Popov, Branko N. ^{[1
]}

机构：

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

来源：

JOURNAL OF POWER SOURCES | 2009年 / 188卷 / 01期

关键词：

Carbon-based catalyst; Nitrogen modification; Oxygen reduction; PEM fuel cell; FE-BASED CATALYSTS; CO-BASED CATALYSTS; HIGH-AREA CARBON; FUNCTIONAL-GROUPS; O-2; REDUCTION; ELECTROCATALYSTS; ADSORPTION; CHLORIDE; PHASE; BLACK;

D O I：

10.1016/j.jpowsour.2008.11.087

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：

Nitrogen-modified carbon-based catalysts for oxygen reduction were synthesized by modifying carbon black with nitrogen-containing organic precursors. The electrocatalytic properties of catalysts were studied as a function of surface pre-treatments, nitrogen and oxygen concentrations, and heat-treatment temperatures. On the optimum catalyst, the onset potential for oxygen reduction is approximately 0.76V (NHE) and the amount of hydrogen peroxide produced at 0.5V (NHE) is approximately 3% under our experimental conditions. The characterization studies indicated that pyridinic and graphitic (quaternary) nitrogens may act as active sites of catalysts for oxygen reduction reaction. In particular, pyridinic nitrogen, which possesses one lone pair of electrons in addition to the one electron donated to the conjugated pi bond, facilitates the reductive oxygen adsorption. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：38 / 44

页数：7

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