Congratulations to Dr. Bo Zheng's paper accepted by ChemElectroChem on May 26, 2016
A post-treatment approach has been developed to prepare nitrogen doped single-layer graphene via ultraviolet/ozone (UV/O₃) irradiation followed by NH₃ annealing. Under optimal experimental conditions, a maximum atomic ratio (N/C) of 16.6 % can be reached. X-ray photoelectron spectroscopy analysis revealed that only one type of pyridinic N was doped in the graphene lattice, which was used as an ideal platform to investigate its catalytic activity toward oxygen reduction reaction (ORR). Electrochemical results demonstrated that ORR on the pyridinic N doped graphene sheet occurs via a two-electron transfer process, indicating that the pure pyridinic N doped graphene is not a good catalyst for ORR.