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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Preparation of nano-platinum and its catalytic activity toward methanol oxidation and oxygen reduction
HUANG You-ju(黄幼菊), DAI Hong-hai(戴宏海), LI Wei(李 伟),
ZHANG Qing-long(张庆龙), ZHAO Ling-zhi(赵灵智), LI Wei-shan(李伟善)

Department of Chemistry, South China Normal University, Guangzhou 510006, China

Abstract:Nano-scale platinum catalysts were prepared on a glass carbon electrode by cyclic voltammetry. The surface morphology and active area of the catalysts, and their catalytic activity toward methanol oxidation and oxygen reduction were studied by SEM, linear and cyclic voltammetry. The result shows that the diameters of global Pt particles are affected by the scan rate of cyclic voltammetry: the faster the scan rate is, the smaller the diameters of Pt particles are. The size of the nano-scale platinum catalysts has different effects on their catalytic activity toward oxygen reduction and methanol oxidation: the catalyst with a size of 100 nm shows its best activity toward methanol oxidation, but the catalyst with a size of 65 nm shows its best activity toward oxygen reduction.

 

Key words: nano; platinum; catalysis; methanol oxidation; oxygen reduction

ISSN 1672-7029
CN 43-1423/U

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