Citation: Zhongwei Wang, Bo Li, Yuchen Xin, Jianguo Liu, Yingfang Yao, Zhigang Zou. Rapid synthesis of nitrogen-doped graphene by microwave heating for oxygen reduction reactions in alkaline electrolyte[J]. Chinese Journal of Catalysis, ;2014, 35(4): 509-513. doi: 10.1016/S1872-2067(14)60016-4 shu

Rapid synthesis of nitrogen-doped graphene by microwave heating for oxygen reduction reactions in alkaline electrolyte

Zhongwei Wang ^a,b ,
Bo Li ^a,b ,
Yuchen Xin ^a,b ,
Jianguo Liu ^a,b,, ,
Yingfang Yao ^a,b ,
Zhigang Zou ^a,b,,

1.
a Eco-materials and Renewable Energy Research Center, Department of Materials Science and Engineering, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, Jiangsu, China;

Corresponding author: Jianguo Liu, Zhigang Zou,
Received Date: 28 November 2013
Available Online: 27 December 2013
Fund Project: 国家自然科学基金(21176111) (21176111)国家重点基础研究发展计划(973计划, 2013CB632404) (973计划, 2013CB632404)国家高技术研究发展计划(863计划, 2011AA11A271) (863计划, 2011AA11A271)

Nitrogen-doped graphene (NG) with a nitrogen content from 4.05 wt% to 5.47 wt% was rapidly prepared via microwave heating of graphene under NH₃ flow. The as-synthesized NG samples were then used as electrocatalysts in the oxygen reduction reaction (ORR) in alkaline solution. The NG samples showed excellent ORR catalytic activity with an onset potential of 0.17 V, which is comparable to that of commercial Pt/C electrocatalyst (0.21 V). The structure, composition, and nitrogen species of the NG samples were examined by transmission electron microscopy, Raman spectroscopy, elemental analysis and X-ray photoelectron spectroscopy. The onset potential increases with the content of graphite nitrogen in the NG samples, indicating that graphite nitrogen might be the main factor controlling the performance of the NG samples in the ORR. The results showed that NG prepared by rapid microwave heating is a promising ORR catalyst for fuel cells.
- Fuel cell,
- Oxygen reduction reaction,
- Onset potential,
- Nitrogen doped graphene,
- Microwave heating
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