▎ 摘　　要

NOVELTY - A high-density transition metal supported graphene-based catalyst producing method involves dissolving a nitrogen-containing precursor, a carbon source and a soluble transition metal salt in water, followed by evaporating, drying and calcining to obtain a finished product. USE - Method for producing a high-density transition metal supported graphene-based catalyst. ADVANTAGE - The method enables producing the high-density transition metal supported graphene-based catalyst with high efficiency, single-atom bearing capacity and high density by using the soluble metal salt, glucose as carbon source and dicyanodiamine as nitrogen doping source and one-step calcination. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a high-density transition metal supported graphene-based catalyst produced by the method.