High-Performance Pd3Pb Intermetallic Catalyst for Electrochemical Oxygen Reduction

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• 作者：Zhiming Cui ; Hao Chen ; Mengtian Zhao ; Francis J. DiSalvo
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：April 13, 2016
• 年：2016
• 卷：16
• 期：4
• 页码：2560-2566
• 全文大小：590K
• 年卷期：0
• ISSN：1530-6992

文摘

Extensive efforts to develop highly active and strongly durable electrocatalyst for oxygen reduction are motivated by a need for metal–air batteries and fuel cells. Here, we report a very promising catalyst prototype of structurally ordered Pd-based alloys, Pd₃Pb intermetallic compound. Such structurally ordered Pd₃Pb/C exhibits a significant increase in mass activity. More importantly, compared to the conventional Pt/C catalysts, ordered Pd₃Pb/C is highly durable and exhibits a much longer cycle life and higher cell efficiency in Zn−air batteries. Interestingly, ordered Pd₃Pb/C possesses very high methanol tolerance during electrochemical oxygen reduction, which make it an excellent methanol-tolerant cathode catalyst for alkaline polymer electrolyte membrane fuel cells. This study provides a promising route to optimize the synthesis of ordered Pd-based intermetallic catalysts for fuel cells and metal–air batteries.