▎ 摘 要
NOVELTY - An air cathode has catalyst layer containing nitrogen-doped graphene, and diffusion layer. USE - The air cathode is useful in microbial fuel cell for treating aqueous medium (all claimed). ADVANTAGE - The air cathode is prepared by simple and convenient method, and has excellent catalyst performance and electrode performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of air cathode; (2) microbial fuel cell; and (3) use of microbial fuel cell for treating aqueous medium.