Catalityc effects of ruthenium and osmium spontaneous deposition on platinum surfaces toward methanol oxidation

被引：18

作者：

Bonilla, SH

Zinola, CF

Rodríguez, J

Díaz, V

Ohanian, M

Martínez, S

Giannetti, BF

机构：

[1] Univ Republica, Fac Ciencias, Lab Electroquim Fundamental, Montevideo 11400, Uruguay

[2] Univ Paulista, Inst Ciencias Exatas & Tecnol, Lab Fisicoquim Teor & Aplicada, LAFTA, BR-04026002 Sao Paulo, Brazil

[3] Univ Republica, Fac Ingn, Inst Ingn Quim, Montevideo 11300, Uruguay

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2005年 / 288卷 / 02期

关键词：

ruthenium; osmium; platinum; electrocatalysis; voltammetry;

D O I：

10.1016/j.jcis.2005.03.039

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：

The influence of ruthenium and osmium spontaneous deposition on polycrystalline platinum in sulfuric acid was studied by conventional electrochemical techniques. The inhibition of the hydrogen adatom voltammetric profile by the foreign adatoms was used to calculate the degree of surface coverage of ruthenium, osmium, and a mixture of both metal ions front solutions of different composition. Methanol adsorption and oxidation were compared on bare platinum. platinum/ruthenium, platinum-Vosmium. and ternary compounds, considering the efficiency of methanol oxidation per hydrogen adatom displaced by the foreign metal on platinum. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：377 / 386

页数：10

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