Investigation of bimetallic Pt-M/C as DMFC cathode catalysts

被引：74

作者：

Baglio, V. ^{[1
]}

Stassi, A. ^{[1
]}

Di Blasi, A. ^{[1
]}

D'Urso, C. ^{[1
]}

Antonucci, V. ^{[1
]}

Arico, A. S. ^{[1
]}

机构：

[1] CNR ITAE Inst, I-98126 Messina, Italy

来源：

ELECTROCHIMICA ACTA | 2007年 / 53卷 / 03期

关键词：

direct methanol fuel cells; methanol tolerance; Pt-Co catalyst; Pt-Cu catalyst; Pt-Fe catalyst;

D O I：

10.1016/j.electacta.2007.04.099

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A low temperature preparation procedure, based on a combination of colloidal and incipient wetness methods, was developed to modify the Pt catalyst with transition metals (Fe, Cu and Co). A moderate degree of alloying was obtained with Pt-Fe/C and Pt-Co/C cathode catalysts by using the new low temperature preparation route; whereas, a high degree of alloying was obtained for Pt-Cu/C by using the same procedure. Despite of the high metal concentration (60 wt%) on carbon, all catalysts showed small primary metal particle size and a low degree of agglomeration. These catalysts were investigated as cathodes in direct methanol fuel cells (DMFCs) operating at low temperatures (60 degrees C). It appeared that Pt-Fe/C catalysts were superior than Pt/C, Pt-Co/C and Pt-Cu/C catalysts both in terms of catalytic activity and tolerance to methanol. Adsorbed methanolic residues stripping analysis indicated a better methanol tolerance and an enhanced activity towards oxygen reduction in the case of the Pt-Fe system. An improvement of the DMFC single cell performance was also observed in the presence of Pt-Fe catalysts. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1360 / 1364

页数：5

共 32 条

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