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Ultrasonic synthesis and evaluation of non-platinum catalysts for alkaline direct methanol fuel cells

被引：63
作者：
Bunazawa, Hideaki [1 ]
Yamazaki, Yohtaro [1 ]
机构：
[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Innovat & Engineered Mat, Midori Ku, Kanagawa 2268502, Japan
来源：
JOURNAL OF POWER SOURCES | 2009年 / 190卷 / 02期
关键词：
Fuel cell; DMFC; Alkaline; Anion; Ultrasonic; Cavitation; ANION-EXCHANGE MEMBRANE; SONOCHEMICAL REDUCTION; METAL NANOPARTICLES; PERFORMANCE; ELECTROLYTE; MECHANISM; SURFACE;
D O I：
10.1016/j.jpowsour.2009.01.077
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：
Ultrasonic synthesis was investigated as a synthesis method of non-platinum catalysts for alkaline direct methanol fuel cells (alkaline DMFCs) such as 20% mass Pd/C, Au/C, and PdAu/C. Among four kinds of solvents, ethylene glycol was demonstrated to be the optimum solvent for the synthesis of those catalysts. When ethylene glycol was used, the synthesized metal nanoparticles were highly dispersed on carbon particles. The synthesized Pd/C and PdAu/C showed the high oxygen reduction reaction (ORR) activity in alkaline condition (0.5 M NaOH aqueous solution), which was comparable to conventional Pt/C. Moreover, they showed lower methanol oxidation reaction (MOR) activity. Membrane electrode assemblies (MEAs) containing the synthesized Pd/C cathode catalysts and alkaline ion exchange membranes were fabricated and evaluated by single cell tests. They showed high performance that was comparable to MEAs with Pt/C cathode. In addition, it was found that the synthesized Pd/C was relatively tolerant to methanol crossover. (c) 2009 Elsevier B.V. All rights reserved.
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页码：210 / 215
页数：6
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