▎ 摘　　要

NOVELTY - Preparation method of nanodiamond/graphene supported platinum (Pt) single-atom catalyst involves dissolving citric acid and urea in deionized water, adding nano-diamond powder, and successively undergoing ultrasonic mixing, microwave heating, vacuum drying, grinding, high-temperature calcination and grinding to obtain nano-diamond/graphene composite material. Adding the nano-diamond/graphene composite material into the platinum(II) chloride (PtCl2) solution, stirring and mixing evenly, to obtain a combination of the nano-diamond/graphene composite material and PtCl2. Performing multiple electrical discharge machining on the combination of nano-diamond/graphene composite material and PtCl2 to obtain the initial product. Subjecting the initial product to centrifugal purification treatment, taken out and drying to a constant weight. USE - Preparation method of nanodiamond/graphene supported platinum single-atom catalyst used for hydrogen production. ADVANTAGE - Nanodiamond/graphene supported platinum single-atom catalyst prepared by the preparation method of the nano-diamond/graphene-loaded platinum monatomic catalyst has high loading rate, good catalytic activity and high catalytic efficiency, and preparation method has high efficiency, low cost, stable preparation quality, simple process and no secondary pollution.