Analysis of the electrochemical characteristics of a direct methanol fuel cell based on a Pt-Ru/C anode catalyst

被引：186

作者：

Arico, AS ^{[1
]}

Creti, P ^{[1
]}

Kim, H ^{[1
]}

Mantegna, R ^{[1
]}

Giordano, N ^{[1
]}

Antonucci, V ^{[1
]}

机构：

[1] SEOUL NATL UNIV,DEPT CHEM,SEOUL 151742,SOUTH KOREA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1996年 / 143卷 / 12期

关键词：

D O I：

10.1149/1.1837321

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A vapor-feed direct methanol fuel cell based on a Nafion 117(R) solid polymer electrolyte was investigated. Pt-Ru/C and Pt/C catalysts were employed for methanol oxidation and oxygen reduction, respectively. The structure, surface, and morphology of the catalysts were investigated by x-ray powder diffraction, x-ray photoelectron spectroscopy, and transmission electron microscopy. Crystalline face-centered cubic phases were found In the Pt and Pt-Ru catalysts. The alloy composition in the Pt-Ru/C catalyst was different from the nominal composition, probably due to the formation of surface RuOx species, as indicated by x-ray photoelectron spectroscopy. Transmission electron microscopy observation showed an increase of the average particle size and particle agglomeration in the Pt-Ru/C catalyst compared to the Pt/C catalyst. The membrane/electrode assembly was prepared by using a ''paste process'' method. Scanning electron microscopy and energy dispersive x-ray analyses showed good adhesion of catalyst layers to the membrane and a homogeneous distribution of the ionomer inside the catalyst. AC-impedance and galvanostatic steady-state polarization techniques were used to investigate the electrochemical performance of the direct methanol fuel ce;l.

引用

页码：3950 / 3959

页数：10

共 37 条

[1] DIGITAL-SIMULATION OF GALVANOSTATIC CURRENT POTENTIAL DATA FOR GAS-DIFFUSION ELECTRODES AND ESTIMATION OF ELECTRODE-KINETIC PARAMETERS [J].