▎ 摘　　要

NOVELTY - Preparing graphene involves heating metal material to melt completely in protection of inert gas, mixing inert gas and carbon source into molten metal, reducing carbon source into molten metal to obtain graphene, and separating from gas to obtain graphene. USE - Method for preparing graphene for metal catalyst (claimed). ADVANTAGE - The method enables to prepare graphene that is suitable for large-scale production, has high quality, high yield, good conductivity i.e. 105-106 siemens per meter, and in simple and eco-friendly manner.