Performance of Pt-Ru/C doped with Ho for methanol electro-catalytic oxidation

被引：1
|
作者：
Liu Shibin [1 ]
Wang Xiuguang [1 ]
Li Yibing [1 ]
Hao Xiaogang [1 ]
Zhang Zhonglin [1 ]
Duan Donghong [1 ]
Sun Yanping [1 ]
机构：
[1] Taiyuan Univ Technol, Sch Chem & Chem Engn, Taiyuan 030024, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2008年 / 37卷 / 05期
关键词：
pulse electro-deposition; electro-catalysts; electro-catalytic oxidation; rare earth element;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Pt-Ru-Ho/C catalysts for methanol electro-oxidation have been prepared by pulse electro-deposition method. The activities of catalysts were characterized by cyclic voltammetry (CV) and electrochemical impedance spectrum (EIS). The micro-structure and composition of the catalysts were characterized by XRD, EDS and XPS. The results show that Pt-based alloy nano-particles supported on carbon black consist of Pt, Ru, Ho elements, and the particle size and the specific surface of catalysts are about 3.5 nm and 73.3 m(2). g(-1), respectively. The electro-catalytic activity of Pt-Ru/C can markedly be improved by doping with Ho. The optimum mole fraction in Pt-Ru-Ho alloy nano-particle is n(pt):n(Ru):n(Ru) =1:1:0.2. Tafel constant a for Pt-Ru-Ho-0.2/C is lower than that of Pt-Ru/C. The reaction order and the active energy of the methanol electro-oxidation are 0.17 and 28.4 kJ.mol(-1), respectively.
引用
收藏
页码：909 / 913
页数：5
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