▎ 摘　　要

NOVELTY - Nickel-cobalt sulfide ((Ni-Co)9S8)-nitrogen-enriched porous carbon oxygen reduction catalyst comprises 8-10 pts. wt. organic ligand, 24-28 pts. wt. cobalt chloride (CoCl2), 36-42 pts. wt. nickel nitrate (Ni(NO3)2), 12-14 pts. wt. ammonium sulfide ((NH4)2S), and 6-20 pts. wt. graphene oxide. USE - Used as (Ni-Co)9S8-nitrogen-enriched porous carbon oxygen reduction catalyst. ADVANTAGE - The (Ni-Co)9S8 composite material is coated with nitrogen-rich porous carbon to avoid agglomeration of (Ni-Co)9S8 particles, and has good conductivity and oxygen reduction catalytic activity. The nitrogen-enriched porous carbon produces active pyridine nitrogen structure and graphitic nitrogen structure during thermal cracking process, improving the oxygen reduction catalytic activity of the material. The nitrogen-enriched porous carbon material has excellent conductivity and large amount of mesopores and pore structures, providing diffusion and transport channels for electron and oxygen reduction reaction products. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the catalyst comprising adding ethanol and distilled water (1.5-2.5:1 volume ratio) mixed solvent into a reaction bottle, adding CoCl2, Ni(NO3)2 and graphene oxide, putting the reaction bottle in an ultrasonic dispersion instrument, heating at 40-50 degrees C, carrying out ultrasonic dispersion for 1-2 hours at ultrasonic frequency of 22-28 kHz, adding organic ligand triazine amide derivative, ultrasonically processing for 20-40 minutes, transferring the solution into a hydrothermal synthesis reaction kettle, placing in reaction kettle heating box, heating at 160-180 degrees C, reacting for 15-20 hours, cooling the solution to room temperature, filtering to remove the solvent, using distilled water and ethanol to wash the solid product, and fully drying to obtain Co-Ni bimetallic metal organic frameworks (MOFs); and adding ethanol solvent into the reaction bottle, adding (NH4)2S and Co-Ni bimetallic MOFs, putting the solution in constant temperature water bath, heating at 75-85 degrees C, uniformly stirring for 3-4 hours, putting the reaction bottle in ultrasonic dispersion instrument, heating at 45-55 degrees C, performing ultrasonic dispersion treatment at ultrasonic frequency of 25-35 kHz for 2-3 hours, transferring the solution into a hydrothermal synthesis reaction kettle, placing in reaction kettle heating box, heating at 190-210 degrees C, reacting for 20-28 hours, cooling the solution to room temperature, decompressing and concentrating to remove the solvent, using distilled water to wash the solid product, fully drying, putting the solid product in atmosphere resistance furnace, introducing nitrogen (N2), where resistance furnace heating rate is 5-10 degrees C/minute, keeping the temperature at 750-780 degrees C for 3-5 hours, putting the calcined product in a planet ball mill, adding ethanol solvent, where revolution speed is 620-640 revolutions/minute (rpm) and rotation speed is 120-150 rpm, ball milling for 8-12 hours until the material passes through 200-400-mesh sieve, decompressing and concentrating the material to remove the solvent and fully drying, putting the solid product in 1-1.5 mol/L hydrochloric acid solution, putting the solution in ultrasonic dispersion instrument at ultrasonic frequency of 20-25 kHz, carrying out acid etching treatment for 25-30 hours, filtering the solution to remove the solvent, using distilled water to wash the solid product until neutral, and fully drying.