A study of oxygen reduction on improved Pt-WC/C electrocatalysts

被引：85

作者：

Nie, Ming

Shen, Pei Kang ^{[1
]}

Wu, Mei

Wei, Zidong

Meng, Hui

机构：

[1] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Sch Phys & Engn, Guangzhou 510275, Peoples R China

[2] Sch Mat Sci & Engn, Chongqing 400044, Peoples R China

[3] Chongqing Univ, Sch Chem Engn, Chongqing 400044, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2006年 / 162卷 / 01期

基金：

中国国家自然科学基金;

关键词：

oxygen reduction reaction (ORR); fuel cell; electrocatalyst; intermittent microwave heating;

D O I：

10.1016/j.jpowsour.2006.07.015

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：

Pt on a tungsten carbide nanocrystalline support (Pt-WC/C) has been prepared by the direct reduction of a platinum salt precursor combined with intermittent microwave heating (IMH). The Pt-WC/C electrocatalyst shows better performance for oxygen reduction in acidic media than that of pure Pt/C or Pt-WC/C prepared by a mechanical mixing method. The results reveal that the Pt-WC/C electrocatalyst prepared by present method is very active for oxygen reduction reaction (ORR) with an onset potential of 1.05 V versus standard hydrogen electrode (SHE) at ambient temperature, which is over 150 mV more positive compared to that of commercial Pt/C electrocatalysts. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：173 / 176

页数：4

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