Development of Pt and Pt-Fe catalysts supported on multiwalled carbon nanotubes for oxygen reduction in direct methanol fuel cells

被引：50

作者：

Baglio, V. ^{[1
]}

Di Blasi, A. ^{[1
]}

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

Antonucci, V. ^{[1
]}

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

Ornelas, R. ^{[2
]}

Morales-Acosta, D. ^{[3
]}

Ledesma-Garcia, J. ^{[3
]}

Godinez, L. A. ^{[3
]}

Arriaga, L. G. ^{[3
]}

Alvarez-Contreras, L. ^{[4
]}

机构：

[1] Inst Technol Avanzate Energia, I-98126 Messina, Italy

[2] Tozzi Renewable Energy SpA, I-48010 Mezzano, RA, Italy

[3] Ctr Invest & Desarrollo Tecnol Electroquim, Queretaro 76703, Mexico

[4] Ctr Invest Mat Avanzados SC, Chihuahua 31109, Chih, Mexico

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2008年 / 155卷 / 08期

关键词：

D O I：

10.1149/1.2938368

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pt and Pt-Fe catalysts supported on multiwalled carbon nanotubes (MWCNTs) were prepared by impregnation and reduction at intermediate temperature (400 degrees C). The MWCNTs with diameters ranging from 20 to 100 nm were synthesized by a spray pyrolysis technique. Pt/MWCNTs and Pt-Fe/MWCNT catalysts were characterized by X-ray diffraction, X-ray fluorescence, scanning electron microscope-energy dispersive X-ray analysis, and transmission electron microscopy techniques. The electrocatalytic behavior for the oxygen reduction reaction was investigated in rotating disk electrode configuration in an acidic medium, also in the presence of various methanol concentrations (0.01, 0.1, and 1 M). An anodic shift of the peak potential for methanol oxidation of similar to 150 mV was observed in the presence of 1 M methanol concentration for the Pt-Fe catalyst compared to the Pt catalyst. Both materials were used as cathodes in a direct methanol fuel cell at 30 and 60 degrees C. A better performance was obtained for the cell based on Pt-Fe/MCWNTs as cathode catalyst. Although slight iron dissolution was observed after two weeks of discontinuous operation, the performance of the Pt-Fe catalyst was larger than the Pt catalyst. (C) 2008 The Electrochemical Society.

引用

页码：B829 / B833

页数：5

共 43 条

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