▎ 摘　　要

NOVELTY - A three-dimensional nickel(II) oxide-porous graphene oxygen evolution catalyst comprises nickel nitrate, iron nitrate, sodium bicarbonate and porous graphene in a mass ratio is 10:(0.6-0.8):(80-120):(2-5). USE - Three-dimensional nickel(II) oxide-porous graphene oxygen evolution catalyst. ADVANTAGE - The three-dimensional nickel(II) oxide-porous graphene oxygen evolution catalyst has low over-potential, excellent oxygen evolution activity and large specific surface area, and enhances the adsorption capacity of nickel(II) oxide to oxygen. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the three-dimensional nickel(II) oxide-porous graphene oxygen evolution catalyst, which involves: (1) adding distilled water solvent to an atmosphere reaction device, then adding sodium lauryl sulfate, sodium bicarbonate, potassium persulfate and styrene in a mass ratio of (6-9):(0.5-1):(0.8-1.5):10, heating at 60-80 degrees C under nitrogen atmosphere, reacting for 10-20 hours, filtering the solution and washing the solid product; (2) dispersing the solid product obtained in step (1) in a distilled water solvent, adding concentrated sulfuric acid and concentrated nitric acid in a volume ratio of (2.8-3.5):2, reacting under nitrogen atmosphere for 2-4 hours, filtering and washing the solid product; (3) dispersing the solid product obtained in step (2) in a sodium hydroxide solution with a substance concentration of 1.5-2.5 mol/l, adding dithionite under nitrogen atmosphere, heating at 70-80 degrees C and reacting for 5-10 hours, filtering, washing and drying to prepare amino functionalized polystyrene microspheres; (4) adding carboxylated graphene and the amino functionalized polystyrene microspheres to distilled water solvent, carrying out ultrasonic dispersion treatment for 3-5 hours, placing the solid mixture in an atmosphere furnace and introducing argon, heating at a heating rate of 2-5 degrees C/minute to 520-550 degrees C, heat preserving for 3-4 hours, then heating at 750-800 degrees C, calcining for 1-1.5 hours, placing the calcined product in a hydrothermal reactor, and reacting at 160-200 degrees C for 20-30 hours to prepare porous graphene with a three-dimensional morphology; and (5) adding the porous graphene to a composite solvent, ultrasonically dispersing until the mixture is uniform, adding nickel nitrate, stirring at a constant speed for 2-5 hours, dripping an aqueous solution of sodium bicarbonate, reacting for 20-60 minutes, again dripping an aqueous solution of ferric nitrate, reacting for 6-10 hours, washing the solid product, drying, placing in an atmosphere furnace, heating at a heating rate of 1-3 degrees C/minute to 340-380 degrees C under nitrogen atmosphere, heat preserving and calcining for 2-3 hours to prepare three-dimensional nano-flower-shaped iron-doped nickel(II) oxide-supported porous graphene.