▎ 摘　　要

NOVELTY - Preparation of nitrogen doped graphene loaded with cobalt atom involves dissolving 0.01-0.9 mmol cobalt acetate tetrahydrate in 30 mL deionized water to obtain solution, taking 5 mL solution, adding 5 mL of 2.0 mg/mL graphene oxide solution, uniformly stirring to obtain a product, freeze-drying the product and continuously introducing the freeze-dried product into an ammonia gas closed calcining process. USE - Preparation of nitrogen doped graphene loaded with cobalt atom used as positive electrode material for electrocatalytic oxygen reduction reaction (claimed). ADVANTAGE - The method enables simple, economical and environmentally-friendly preparation of nitrogen doped graphene loaded with cobalt atom, with improved reproducibility and catalytic performance. The method is suitable for industrial production.