▎ 摘　　要

NOVELTY - Synthesis of nickel-cobalt nanoparticles-loaded graphene composite material involves (s1) adding graphene dispersion to a flask, adding dilute hydrochloric acid solution to adjust the pH to 2-4, heating until the temperature reaches 40-60℃, and stirring, adding ferrous chloride, stirring for 10-20 minutes, then adding 30% hydrogen peroxide solution, stirring for 1-2 hours to obtain hydroxylated graphene, (s2) adding hydroxylated graphene to N,N-dimethylformamide, ultrasonically dispersing, adding 1,3,5-triazine-2,4,6-triaminohexaonic acid, stirring and reacting, filtering, washing with deionized water to obtain polycarboxylated graphene, and (s3) adding polycarboxylated graphene to deionized water, adding polyvinylpyrrolidone (PVP) K30 as dispersant while stirring, adding nickel chloride and cobalt chloride, stirring, adding to a hydrothermal reaction kettle, reacting, centrifuging and washing. USE - Synthesis of nickel-cobalt nanoparticles-loaded graphene composite material. ADVANTAGE - The synthesis method adopts loading of generated nickel-cobalt nanoparticles on polycarboxylated graphene sheet to effectively avoid the agglomeration of nickel-cobalt nanoparticles, and improve dispersibility of the nickel-cobalt nanoparticles, so that the nickel-cobalt nanoparticles have larger specific surface area and higher electrochemical catalytic activity.