Electrochemical oxidation of methanol on Pt nanoparticles dispersed on RuO2

被引：93

作者：

Villullas, HM ^{[1
]}

Mattos-Costa, FI ^{[1
]}

Bulhoes, LOS ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, CMDMC, LIEC, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2004年 / 108卷 / 34期

关键词：

D O I：

10.1021/jp049662r

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：

Pt-modified RuO2 was prepared by a sol-gel procedure on titanium substrates in the form of thin films of similar to2-mum thickness. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses showed that these films actually consist of Pt nanoparticles dispersed in RuO2 and that neither metallic Ru nor Pt-Ru alloy are present on the surface. Electrodes with different Pt:Ru nominal compositions were prepared and their electrocatalytic activity for the oxidation of methanol was investigated by potential sweeps and chronoamperometry. The results obtained show an enhancement effect for methanol oxidation that can be interpreted as associated to the formation of hydrous oxides on the RuO2 surface.

引用

页码：12898 / 12903

页数：6

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