▎ 摘　　要

NOVELTY - Preparation of nitrogen-rich graphene aerogel supported mono-cluster catalyst involves using graphene and graphitized carbonitride as a carrier of metal monoatomic clusters. USE - Preparation of nitrogen-rich graphene aerogel supported mono-cluster catalyst used to electrocatalyze chemical reactions in alkaline solutions and catalyze oxygen reduction reaction of fuel cells or metal-air batteries and the oxygen evolution reaction of electrolyzed water under alkaline conditions (all claimed). ADVANTAGE - The method has simple and safe operation process and controllable preparation, and is economical and suitable for large-scale industrial production. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) nitrogen-rich graphene aerogel supported mono-cluster catalyst obtained by the preparation method; and (2) use of the nitrogen-rich graphene aerogel supported mono-cluster catalyst as electrocatalyst to electrocatalyze chemical reactions in alkaline solutions.