Journal
ACS NANO
Volume 4, Issue 3, Pages 1321-1326Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn901850u
Keywords
graphene; N-doping; oxygen reduction; fuel cell
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Funding
- National Research Foundation of Korea [2007-0052351, R31-2008-000-20012-0, 2009-0073294] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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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