▎ 摘　　要

NOVELTY - Graphene complex catalyst, and its preparation method are claimed. The graphene complex catalyst comprises 10-40 pts. wt. graphite raw material, 10-50 pts. wt. metal salt, 5-10 pts. wt. gelatin, and 1-2 pts. wt. dispersant. The graphite raw material is at least one chosen from crystalline flake graphite, expanded graphite, highly oriented graphite, pyrolytic graphite, and graphite oxide. The metal salt is at least one chosen from e.g. ferric nitrate, ferric sulfate, cobalt chloride, cobalt sulfate, nickel nitrate, nickel chloride and nickel sulfate. USE - The graphene complex catalyst used for fuel cell (claimed). ADVANTAGE - The graphene complex catalyst is produced in large-scale. DETAILED DESCRIPTION - Graphene complex catalyst, and its preparation method are claimed. The graphene complex catalyst comprises 10-40 pts. wt. graphite raw material, 10-50 pts. wt. metal salt, 5-10 pts. wt. gelatin, and 1-2 pts. wt. dispersant. The graphite raw material is at least one chosen from crystalline flake graphite, expanded graphite, highly oriented graphite, pyrolytic graphite, and graphite oxide. The metal salt is at least one chosen from ferric nitrate, ferric chloride, ferric sulfate, cobalt nitrate, cobalt chloride, cobalt sulfate, nickel nitrate, nickel chloride and nickel sulfate. The dispersant is chosen from oleamide, erucyl amide, polyethylene adipate, phthalate, citrate, acetyl citrate, monostearin and pentaerythritol tetrabenzoate. The gelatin is chosen from sweet potato starch, cassava starch, corn starch, mung bean starch, water caltrop starch, wheat starch, lotus root starch, and potato starch. The method for preparing graphene complex catalyst involves (a) uniformly mixing 10-40 pts. wt. graphite powder, 10-50 pts. wt. metal salt, and 1-2 pts. wt. dispersant in high-speed mixer and dispersing for 10-25 minutes at a speed of 600-1200 revolutions/minute (rpm) to obtain premix, (b) adding solvent to 5-10 pts. wt. gelatin to solvent to obtain gelatin solution, where the solvent is deionized water, uniformly mixing 0.01-1.5 mol/l gelatin solution with premix, and pouring the mixture in a square shaped or cylindrical shaped container to obtain mixed suspension solution, (c) uniformly stirring and heating mixed suspension solution at 53-60 degrees C, where the physical properties of the gelatin paste changes, expanding gelatin paste at high temperature, forming uniform paste solution, and then cooling at room temperature to form gel, and (d) extruding gel in screw extruder, cutting the extruded gel into small sections, heating homogeneous section, introducing protective gas, extruding, stripping graphite under high shearing force, uniformly dispersing graphene mixture, forming uniform random distribution, uniformly stirring graphene complex gel at high speed, uniformly dispersing, heating the mixture at 700-900 degrees C, subjecting metal salt to reduction reaction to obtain metal nanoparticles and gases coated with carbon layer on the surface, discharging gas, and cooling the mixture.