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
收藏
页码：173 / 176
页数：4
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