▎ 摘　　要

NOVELTY - Three-dimensional molybdenum disulfide nanoflower-graphene composite material, is claimed. Preparation of the composite material comprises (i) taking 10 mg graphene oxide and uniformly dispersing in 10 ml of N,N dimethylformamide to obtain a suspension of graphene oxide, (ii) dissolving 20 mg of ammonium thiomolybdate in graphene oxide suspension to obtain a mixed solution, (iii) transferring the solution obtained in step (ii) into a reaction vessel and reacting at 190 degrees C for 15 hours to obtain black product, and (iv) washing with ethanol and vacuum drying at 60 degrees C for 24 hours. USE - The composite material is useful for the preparation of electrode (claimed) and in electrochemical hydrogen evolution. ADVANTAGE - The composite material has synergistic effect of graphene to improve the catalytic efficiency of electrochemical hydrogen evolution, and improves the stability of the catalyst for long time in acidic environment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use method of the three-dimensional molybdenum disulfide nanoflower-graphene composite material in preparation of electrode, comprising dispersing 3 mg molybdenum disulfide nanoflower- graphene composite material in 1.5 ml mixed solution of ethanol and water in the ratio 3:1, adding 120 mu l of 5% Nafion (RTM: Sulfonated tetrafluoroethylene based fluoropolymer-copolymer) solution, uniformly dispersing to obtain a suspension, coating the suspension on a glassy carbon electrode and drying naturally to obtain a three dimensional molybdenum disulfide nanoflower- graphene modified glassy carbon electrode.