Author/Authors :
Ouyang، نويسنده , , Wenpeng and Zeng، نويسنده , , Dongrong and Yu، نويسنده , , Xiang and Xie، نويسنده , , Fangyan and Zhang، نويسنده , , Weihong and Chen، نويسنده , , Jian and Yan، نويسنده , , Jing and Xie، نويسنده , , Fangjing and Wang، نويسنده , , Lei and Meng، نويسنده , , Hui and Yuan، نويسنده , , Dingsheng، نويسنده ,
Abstract :
Nitrogen-doped graphene is studied as a kind of non-noble metal catalyst for the oxygen reduction reaction in the cathode of fuel cells. Graphene is synthesized by pyrolyzing ion exchange resin and nitrogen doping is realized by a second pyrolysis step with nitrogen precursor. High resolution transmission electron microscopy proves the graphene is composed by 8–10 graphitic layers. The defect of graphene caused by nitrogen doping is detected by Raman spectra. The nitrogen group of the doped graphene is studied in detail with X-ray photoelectron spectroscopy spectra and a special type of nitrogen: valley-N is distinguished. The valley-N is proved to play an important role in the oxygen reduction reaction. Nitrogen content is found not directly related with the activity of the oxygen reduction reaction.
Keywords :
Fuel cell , Oxygen reduction reaction , Nitrogen-doped , graphene
