▎ 摘　　要

NOVELTY - Metal organic frameworks (MOFs)-based heteroatom-doped porous carbon electrocatalyst comprises 30-38 pts. wt. nickel nitrate, 16-20 pts. wt. 4,4-azopyridine, 12-20 pts. wt. 4,4'-dithiodibenzoic acid, and 22-42 pts. wt. graphene. USE - MOFs-based heteroatom-doped porous carbon electrocatalyst. ADVANTAGE - The porous carbon material has a large number of catalytic active sites, excellent conductivity and a lower oxygen evolution overpotential, and is uniformly dispersed on the huge specific surface and pores of graphene, so that the phenomenon that the catalyst is agglomerated in an electrolyte to reduce the active sites of the catalyst is avoided. A huge conductive network is formed between the interface of the catalyst and the graphene, and the migration and transmission processes of electrons are promoted. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the electrocatalyst comprising taking reflux device in a reaction bottle, introducing high-purity nitrogen (N2) excluding air, adding distilled water and 30-38 pts. wt. Ni(NO3)2.6H2O, stirring until the solid is dissolved, adding N,N-dimethylformamide, 16-20 pts. wt. 4,4-azopyridine and 12-20 pts. wt. 4,4'-dithiobenzoic acid, placing the reaction bottle in an oil bath, heating at 155-165 degrees C, constant speed stirring and heating at reflux under N2 atmosphere, observing the reaction by thin layer chromatography (TLC), when 4,4'-dithiodibenzoic acid is completely reacted and a large amount of light yellow solid is produced, cooling the solution to room temperature and filtering to remove the N,N-dimethylformamide, washing the pale yellow solid sequentially with distilled water and absolute ethyl alcohol, fully drying to obtain nickel-based double-organic ligand MOFs, adding distilled water in a reaction bottle, adding 22-42 pts. wt. graphene and nickel-based double-organic ligand MOFs, stirring uniformly, transferring the solution into hydrothermal synthesis reaction kettle, placing in a heating box, heating the reaction kettle at 120-130 degrees C, conducting activation reaction for 4-8 hours, after finishing the reaction, pouring the solution in high speed centrifuge to remove distilled water, fully drying the solid product, obtaining nickel based-organic ligand MOFs loaded graphene composite, introducing high purity N2 in atmosphere resistance furnace, adding the nickel based-organic ligand MOFs loaded graphene composite, heating at 5-10 degrees C/minute at 820-850 degrees C, keeping the temperature for 4-6 hours, cooling the calcined product to room temperature, sequentially washing with diluted hydrochloric acid and distilled water, fully drying, obtaining heteroatom N/S-doped porous carbon-loaded graphene material, adding into high energy planet ball mill, adding a small amount of anhydrous ethanol, ball milling until the material passes through 800-mesh sieve, high speed centrifuging, removing anhydrous ethanol, and fully drying the solid.