Oxygen Reduction Reaction Activity of Vulcan XC-72 Doped with Nitrogen under NH3 Gas in Acid Media

被引：24

作者：

Chisaka, Mitsuharu ^{[1
]}

Iijima, Tomohiro ^{[1
]}

Tomita, Akira ^{[1
]}

Yaguchi, Tatsuro ^{[1
]}

Sakurai, Yoji ^{[1
]}

机构：

[1] Toyohashi Univ Technol, Dept Elect & Elect Informat Engn, Aichi 4418580, Japan

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2010年 / 157卷 / 11期

关键词：

MEMBRANE FUEL-CELLS; NONNOBLE ELECTROCATALYST; NONPLATINUM CATHODE; CATALYTIC MATERIALS; CARBON; PEFC; NIOBIUM; OXYNITRIDE; SITES;

D O I：

10.1149/1.3489365

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We doped Vulcan XC-72 (VXC-72) with nitrogen by heating it under flowing NH(3) gas in various conditions and investigated its oxygen reduction reaction (ORR) activity in 0.1 M H(2)SO(4). The cyclic voltammograms, X-ray photoelectron spectra, and Brunauer-Emmett-Teller analyses indicated that the heating temperature greatly influenced ORR activity, nitrogen content, and surface area of VXC-72. Furthermore, the heating time also influenced the ORR activity. Therefore, the rate of cooling as well as that of heating at above 773 K was found to be fixed to evaluate ORR activity. Under controlled heating/cooling conditions, the maximum onset potential for ORR was 0.70 V vs normal hydrogen electrode when VXC-72 was heated at 1223 K for 24 h under NH3 gas (200 mL min(-1)). (c) 2010 The Electrochemical Society. [DOI: 10.1149/1.3489365] All rights reserved.

引用

页码：B1701 / B1706

页数：6

共 34 条

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