Non-precious oxygen reduction catalysts prepared by high-pressure pyrolysis for low-temperature fuel cells

被引：117

作者：

Kothandaraman, R. ^{[1
]}

Nallathambi, Vijayadurga ^{[1
]}

Artyushkova, Kateryna ^{[2
]}

Barton, Scott Calabrese ^{[1
]}

机构：

[1] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA

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

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2009年 / 92卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

Electrocatalysis; Oxygen reduction reaction; Non-precious catalysts; Pyrolysis; XPS; Fuel cells; CONTAINING CARBON CATALYSTS; FE-BASED CATALYSTS; ELECTROCHEMICAL CHARACTERIZATION; ACTIVE-SITES; AREA CARBON; TOF-SIMS; NITROGEN; ELECTROCATALYSTS; METHANOL; FE/N/C;

D O I：

10.1016/j.apcatb.2009.07.005

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：

Iron-based catalysts for the oxygen reduction reaction (ORR) were produced by pyrolysis of iron-acetate and Ketienblack (R) carbon with varying amounts of 2,2'-bipyridine in a closed, constant-volume vessel. The total surface nitrogen content detected by XPS varied from 0.6 to 2.2 at% when the nitrogen precursor loading was varied from 1.5 to 11.3 wt%. The amount of nitrogen in the Fe-pyridinic form is estimated to vary between 0.12 and 0.24 at%, correlating to catalytic activity (current density) variation from 0.07 to 1.9 mA cm(-2) at a catalyst loading of 0.5 Mg cm(-2). These results support the theory that iron associated with pyridinic nitrogen is a component of the catalytic active site responsible for oxygen reduction. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：209 / 216

页数：8

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