Perovskite-type oxides La_1−xSr_xMnO₃ for cathode catalysts in direct ethylene glycol alkaline fuel cells

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• 作者：Kohei Miyazaki ; Naotsugu Sugimura ; Koji Matsuoka ; Yasutoshi Iriyama ; Takeshi Abe ; Masao Matsuoka ; Zempachi Ogumi
• 关键词：Perovskite-type oxide ; Oxygen reduction ; Crossover ; Ethylene glycol ; Methanol
• 刊名：Journal of Power Sources
• 出版年：2008
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：1 April 2008
• 卷：178
• 期：2
• 页码：683-686
• 文件大小：420 K

摘要

Carbon-supported La_1−xSr_xMnO₃ (LSM/C) was prepared by reversible homogeneous precipitation method, and its catalytic activities for oxygen reduction under the existence of ethylene glycol (EG) were investigated by using rotating disk electrode. LSM/C exhibited the high activity for oxygen reduction irrespective with the presence of EG, indicating that EG is not oxidized by LSM/C at the cathode side in the present system. Consequently, LSM/C can serve as a cathode catalyst in alkaline direct alcohol fuel cells with no crossover problem. Performance test for fuel cells operation also supported these results and showed cathodic polarization curves were not affected by the concentration of EG supplied to anode even at 5 mol dm⁻³.