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Methanol-tolerant PdPt/C alloy catalyst for oxygen electro-reduction reaction |
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| Authors: | Ji Bong Joo You Jung Kim Wooyoung Kim Nam Dong Kim Pil Kim Younghun Kim Jongheop Yi |
| Affiliation: | (1) School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Shinlim-dong, Gwanak-gu, Seoul, 151-744, Korea;(2) School of Chemical Engineering & Specialized Graduate School of Hydrogen and Fuel Cell Engineering, Chonbuk National University, Deokjin dong, Deokjin-gu, Jeonju, 561-756, Korea;(3) Department of Chemical Engineering, Kwangwoon University, Wolgye-dong, Nowon-gu, Seoul, 139-701, Korea |
| Abstract: | A carbon-supported Pd-based PdPt catalyst (PdPt/C) with a small amount of Pt was prepared by borohydride reduction method and its activity in the oxygen electro-reduction reaction (ORR) was investigated in acidic conditions both with and without methanol. For comparison, carbon-supported Pt (Pt/C) and Pd (Pd/C) catalysts were prepared and the ORR activities were compared. Results revealed that the PdPt/C catalyst showed slightly lower ORR activity in terms of onset potential of oxygen reduction than Pt/C catalyst in 0.1M HClO4. However, PdPt/C catalyst exhibited enhanced activity toward selective ORR with methanol-tolerant characteristics in 0.1M HClO4 in the presence of methanol. The PdPt/C catalyst prepared here is suitable for use as a cathodic electrocatalyst in direct alcohol fuel cells after addition of small amount of expensive Pt metal. |
| Keywords: | Electrocatalyst PdPt Alloy Oxygen Reduction Methanol Tolerant Fuel Cell |
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