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

被引：17

作者：

Savinova, ER ^{[1
]}

Lebedeva, NP ^{[1
]}

Simonov, PA ^{[1
]}

Kryukova, GN ^{[1
]}

机构：

[1] Russian Acad Sci, Boreskov Inst Catalysis, Siberian Div, Novosibirsk 630090, Russia

来源：

RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2000年 / 36卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1007/BF02757507

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nano-sized particles of platinum deposited on highly oriented pyrolytic graphite (HOPG) electrolessly (average size d = 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

页码：952 / 959

页数：8

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