Journal
ACS CATALYSIS
Volume 3, Issue 6, Pages 1263-1271Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs4001927
Keywords
fuel cells; graphene; iron phthalocyanine; noble metal-free electrocatalyst; oxygen reduction reaction
Categories
Funding
- NSFC, China [21175130, 21105096, 21205112, 21275136]
- Department of Science and Techniques of Jilin Province [20120308, 201215090, 201215091]
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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 pi-pi 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 pi-stacking interaction between FePc and planar aromatic structure of graphene. The as-prepared graphene-iron phthalocyanine (g-FePc) composite exhibits an efficient 4-electron pathway and can be used as a promising Pt-free ORR electrocatalyst.
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