Enhancing the pyridinic N content of Nitrogen-doped graphene and improving its catalytic activity for oxygen reduction reaction

In this work, we find that the annealing treatment can effectively enhance the pyridinic N content in NG obtained from the hydrothermal method. The increase of the pyridinic N content can improve the ORR catalytic activity as well as stability of the NG catalysts. The result confirms that pyridinic N is related to the active center of NG for ORR.158