As a front runner to substitute for Pt as oxygen reduction reaction (ORR) catalysts, the N species in N-doped carbon materials have an important effect on their ORR activity. Herein, we report a nitrogen-doped graphene sheets (NrGO) rich in graphitic-N prepared through a thermal pyrolysis process of a mixture of polyaniline and graphene oxide. The electrochemical result of this novel graphitic N-rich NrGO exhibits excellent catalytic performance for oxygen reduction reaction with onset potential of 0.99 V and half-wave potential of 0.84 V. The transferred electron number of the oxygen reduction reaction process is 3.92, indicating a typical 4 electron path. This new NrGO sheet catalyst also exhibits outstanding durability and methanol resistance superior to Pt/C. This paper can provide a basis for the research of the effect of nitrogen species on their ORR catalytic activity in N-doped carbon materials.

作为替代Pt作为氧还原反应（ORR）催化剂的先行者，N掺杂碳材料中的N物种对其ORR活性具有重要影响。本文中，我们报道了通过聚苯胺和氧化石墨烯的混合物的热解过程制备的富含石墨N的氮掺杂石墨烯片（NrGO）。这种新颖的富氮石墨NrGO的电化学结果对氧还原反应表现出优异的催化性能，起始电势为0.99 V，半波电势为0.84V。氧还原反应过程的转移电子数为3.92，表明典型4个电子路径。这种新型NrGO片状催化剂还具有出色的耐久性和优于Pt / C的耐甲醇性。