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The methanol oxidation reaction on platinum alloys with the first row transition metals - The case of Pt-Co and -Ni alloy electrocatalysts for DMFCs: A short review
被引:377
作者:
Antolini, E
Salgado, JRC
Gonzalez, ER
机构:
[1] Scuola Sci Mat, I-16016 Genoa, Italy
[2] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
关键词:
methanol oxidation;
platinum alloy catalysts;
nickel;
cobalt;
direct methanol fuel cell;
D O I:
10.1016/j.apcatb.2005.09.014
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:
In recent years there has been much activity in examining Pt alloys with first row transition metals as catalysts materials for DMFCs. In this work, the electrochemical oxidation of methanol on Pt-Co and -Ni alloy electrocatalysts is reviewed. The effect of the transition metal on the electrocatalytic activity of Pt-Co and -Ni for the methanol oxidation reaction (MOR) has been investigated both in half-cell and in direct methanol fuel cells. Conflicting results regarding the effect of the presence of Co(Ni) on the MOR are examined and the primary importance of the amount of non-precious metal in the catalyst is remarked. For low base metal contents, an enhancement of the onset potential for the MOR with increasing Co(Ni) amount in the catalyst is observed, whereas for high contents of the base metal, a drop of the MOR onset potential with increasing Co(Ni) is found. As well as the base metal content, an important role on the MOR activity of these catalysts has to be ascribed to the degree of alloying. (c) 2005 Elsevier B.V. All rights reserved.
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页码:137 / 149
页数:13
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