Department of Chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, P. R. China.
ACS Nano. 2010 Mar 23;4(3):1321-6. doi: 10.1021/nn901850u.
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.
氮掺杂石墨烯（N-graphene）是通过在氨存在的情况下，甲烷的化学气相沉积合成的。研究结果表明，与铂相比，N-graphene 作为一种无金属电极，在碱性燃料电池中通过四电子途径还原氧气时，具有更好的电催化活性、长期运行稳定性和对交叉效应的耐受性。据我们所知，这是首次报道将石墨烯及其衍生物用作无金属催化剂来还原氧气。氮掺杂对氧还原反应（ORR）的重要作用可以应用于各种碳材料，以开发用于燃料电池的其他无金属高效 ORR 催化剂，甚至是超越燃料电池应用的新催化材料。
