Electrocatalytic properties of platinum anchored to the surface of highly oriented pyrolytic graphite

被引：0
|
作者：
E. R. Savinova
N. P. Lebedeva
P. A. Simonov
G. N. Kryukova
机构：
[1] Russian Academy of Sciences,Boreskov Institute of Catalysis, Siberian Division
来源：
Russian Journal of Electrochemistry | 2000年 / 36卷
关键词：
Support Surface; Scanning Electron Micro; Highly Orient Pyrolytic Graphite; Potential Cycling; Electrocatalytic Property;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Nano-sized particles of platinum deposited on highly oriented pyrolytic graphite (HOPG) electrolessly (average sized = 3.4 nm) or electrochemically (d = 20 nm) and polycrystalline platinum are compared. The dispersed electrodes exhibit special features in the oxidation of ethylene glycol and adsorbed carbon monoxide. In particular, they reduce the overpotential of these processes. Possible reasons for the observed distinctions are discussed. The potential cycling leads to coalescence of nano-sized Pt particles on HOPG. As a result, their size distribution expands, and the distribution maximum shifts towards large sizes (d = 6.4 nm). This seriously complicates use of Pt/HOPG as a model electrode for investigating the size effect.
引用
收藏
页码：952 / 959
页数：7
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