Investigation of unsupported Pt-Ru catalysts for high temperature methanol electro-oxidation

被引：40

作者：

Aricò, AS

Monforte, G

Modica, E

Antonucci, PL

Antonucci, V

机构：

[1] CNR, TAE Inst Transformat & Storage Energy, I-98126 Messina, Italy

[2] Univ Reggio Calabria, Dept Mat & Mech, I-89100 Reggio Di Calabria, Italy

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2000年 / 2卷 / 07期

关键词：

Pt-Ru catalysts; X-ray diffraction; X-ray photoelectron spectroscopy; methanol electro-oxidation; fuel cells;

D O I：

10.1016/S1388-2481(00)00063-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Two unsupported Pt-Ru catalysts, varying in the nature and content of RuOx species, were investigated for methanol electro-oxidation in a solid polymer electrolyte fuel cell at high temperature. The catalyst containing a lower amount of ruthenium oxide showed higher catalytic activity and lower mass transport limitations. A physicochemical investigation was carried out to support the interpretation of electrochemical results. Pt-Ru alloy appears more active than Pt-RuOx in the chemisorption of labile-bonded oxygenated species, which promote the oxidation of the methanolic residues adsorbed on the catalyst surface. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：466 / 470

页数：5

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