期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 28, 期 -, 页码 24-26出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2012.11.037
关键词
Nitrogen doped graphene; Hydrothermal synthesis; Thermal annealing; Nitrogen configuration; Oxygen reduction reaction
资金
- National 973 Basic Research Program [2012CB933800]
- National Natural Science Foundation of China [21035002]
- National Science Fund for Creative Research Groups [21121091]
- Natural Science Foundation of Jiangsu province [BK2010009, BKBK2011440]
A novel strategy for fabricating nitrogen doped graphene sheets has been developed using graphite oxide as the carbon source and urea as the nitrogen source via hydrothermal approach. This method allows us to obtain high doping level of nitrogen in graphene. The doped nitrogen mainly exists as pyridinic and pyrrolic N bonding configurations. Subsequent thermal annealing will transfer the pyrrolic N to graphitic N significantly. Electrochemical results demonstrate that larger amount of graphitic nitrogen configuration may play an active role in the excellent electrocatalytic activity toward oxygen reduction reaction (ORR) in alkaline electrolyte. (c) 2012 Elsevier B.V. All rights reserved.
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