Enhanced Catalytic Performance of Pt-Free Iron Phthalocyanine by Graphene Support for Efficient Oxygen Reduction Reaction

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• 作者：Yuanyuan Jiang ; Yizhong Lu ; Xiangyu Lv ; Dongxue Han ; Qixian Zhang ; Li Niu ; Wei Chen
• 刊名：ACS Catalysis
• 出版年：2013
• 出版时间：June 7, 2013
• 年：2013
• 卷：3
• 期：6
• 页码：1263-1271
• 全文大小：461K
• 年卷期：v.3,no.6(June 7, 2013)
• ISSN：2155-5435

文摘

It is commonly accepted that it is almost not possible to realize the large-scale practical application of fuel cells if the expensive noble metal-based electrocatalysts for oxygen reduction reactions (ORR) cannot be replaced by other low-cost, efficient, and stable ones. Herein, our studies demonstrate that iron phthalocyanine (FePc) supported on chemically reduced graphene through 蟺鈥撓€ interaction can act as a noble metal-free electrocatalyst with a comparable activity, long-term operation stability, and better tolerance to methanol crossover and CO poisoning compared with commercial Pt/C for ORR in alkaline media. The improved electrochemical activity and stability of FePc by graphene is mainly attributed to the inherent properties of graphene and the 蟺-stacking interaction between FePc and planar aromatic structure of graphene. The as-prepared graphene鈥搃ron phthalocyanine (g-FePc) composite exhibits an efficient 4-electron pathway and can be used as a promising Pt-free ORR electrocatalyst.

Keywords:

fuel cells; graphene; iron phthalocyanine; noble metal-free electrocatalyst; oxygen reduction reaction