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
收藏
页码：466 / 470
页数：5
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