▎ 摘　　要

Nitrogen-doped graphene (NG) catalyst on the oxygen reduction reaction (ORR) has been investigated in alkaline solution using the rotating disk electrode (RDE) method. Here, we reported a facile NG catalyst via a convenient and simple method of microwave solvothermal from graphite oxide (GO) in the mixture solution of ethylene glycol (EG) and ethylene diamine (ED). The effect of microwave irradiation time and the ratio of EG and ED on the performance of the catalyst were investigated. The structure and property of NG catalysts were characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), Raman spectroscopy, and Fourier transform infrared spectra (FT-IR). Most importantly, the as-synthesized NG catalyst exhibited a positive onset potential (E-ORR) and nearly four electron transfer process, which is better than non-N-graphene. Furthermore, the role of various nitrogen states in NG catalysts were investigated by X-ray spectroscopy (XPS), and the results showed that the content of graphite-N components determined the E-ORR. Besides, comprehensive characterizations revealed that NG catalyst in ORR process had no direct relationships with the content of total N.