Synergy among manganese, nitrogen and carbon to improve the catalytic activity for oxygen reduction reaction

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• 作者：Jian Kang ; Hui Wang ; Shan Ji ; Julian Key ; Rongfang Wang
• 关键词：Manganese-modified ; Nitrogen-doped carbon ; Glycine ; Oxygen reduction reaction
• 刊名：Journal of Power Sources
• 出版年：1 April, 2014
• 年：2014
• 卷：251
• 期：Complete
• 页码：363-369
• 全文大小：1950 K

文摘

A highly active electrocatalyst for oxygen reduction reaction, manganese modified glycine derivative-carbon (Mn-CN_x), is synthesized by a two-step carbonizing process. X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy are used to characterize structure and morphology of the catalysts. Electrochemical tests show that Mn-CN_x has higher catalytic activity for oxygen reduction reaction than CN_x derived glycine and Mn modified Vulcan carbon. Moreover, the half-wave potential of Mn-CN_x is only 12聽mV lower than that of commercial Pt/C. Mn-CN_x also has excellent durability to methanol crossover in alkaline solution, and thus provides a promising low cost, non-precious metal cathode catalyst for fuel cells.