Mixed phase Pt-Ru catalyst for direct methanol fuel cell anode by flame aerosol synthesis

被引:28
作者
Chakraborty, D [1 ]
Bischoff, H
Chorkendorff, I
Johannessen, T
机构
[1] Tech Univ Denmark, Dept Chem Engn, ICAT, DK-2800 Lyngby, Denmark
[2] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark
关键词
D O I
10.1149/1.2109547
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A spray-flame aerosol catalyzation technique was studied for producing Pt-Ru anode electrodes for the direct methanol fuel cell. Catalysts were produced as aerosol nanoparticles in a spray-flame reactor and deposited directly as a thin layer on the gas diffusion layer. The as-prepared catalyst was found to be a mixture of nanocrystalline, mostly unalloyed Pt and an amorphous phase mostly of Ru and to a lesser extent of Pt oxides on top of the crystalline phase. The flame-produced Pt1Ru1 demonstrated similar onset potential but similar to 60% higher activity compared to commercially available Pt1Ru1/Vulcan carbon. The kinetics of methanol oxidation on the mixed phase catalyst was also explored by electrochemical impedance spectroscopy. (c) 2005 The Electrochemical Society.
引用
收藏
页码:A2357 / A2363
页数:7
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