Nitrogen-Doped Graphene as Efficient Metal-Free Electrocatalyst for Oxygen Reduction in Fuel Cells
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- Nitrogen-Doped Graphene as Efficient Metal-Free Electrocatalyst for Oxygen Reduction in Fuel Cells
- Qu, Liangti; Liu, Yong; Baek, Jong-Beom; Dai, Liming
- Carbon material; Catalytic materials; Crossover effects; Electrocatalytic activity; Fuel cell application; Long-term operation; N-Doping; Nitrogen-doped; Oxygen Reduction; Oxygen reduction reaction
- Issue Date
- AMER CHEMICAL SOC
- ACS NANO, v.4, no.3, pp.1321 - 1326
- Nitrogen-doped graphene (N-graphene) was synthesized by chemical vapor deposition of methane in the presence of ammonia. The resultant N-graphene was demonstrated to act as a metal-free electrode with a much better electrocatalytic activity, long-term operation stability, and tolerance to crossover effect than platinum for oxygen reduction via a four-electron pathway in alkaline fuel cells. To the best of our knowledge, this is the first report on the use of graphene and its derivatives as metal-free catalysts for oxygen reduction. The important role of N-doping to oxygen reduction reaction (ORR) can be applied to various carbon materials for the development of other metal-free efficient ORR catalysts for fuel cell applications, even new catalytic materials for applications beyond fuel cells.
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