Nitrogen-Doped Carbon Vesicles with Dual Iron-Based Sites for Efficient Oxygen Reduction

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• 作者：Dr. Qianru Li ; Gang Wan ; Han Zhao ; Linyu Pan ; Ning Wang ; Wanpeng Zhao ; Xiaoxia Zhou ; Xiangzhi Cui and Prof. Hangrong Chen
• 刊名：ChemSusChem
• 出版年：2017
• 出版时间：February 8, 2017
• 年：2017
• 卷：10
• 期：3
• 页码：499-505
• 全文大小：1732K
• ISSN：1864-564X

文摘

A nitrogen-doped vesicle-like porous carbon with well-integrated dual iron-based catalytic sites was developed through direct pyrolysis of inexpensive and abundant precursors. Benefiting from the mesoporous structures with synchronous construction of Fe–N_x and Fe/Fe₃C@NC sites, the optimized catalyst exhibited outstanding performance for the oxygen reduction reaction (ORR) in alkaline media, even superior to the commercial Pt/C catalyst. Detailed characterizations revealed that Fe/Fe₃C@NC sites can make major catalytic contributions in basic media, whereas the Fe–N_x sites were found to play an indispensable role for ORR in acidic media.