▎ 摘　　要

NOVELTY - Preparing nanoporous nickel-molybdenum disulfide/graphene composite material involves synthesizing graphite oxide according to the modified Hummers method. The synthesis of hydrothermal molybdenum disulfide/reduced graphene oxide (MoS2/RGO) composites involves dissolving 2.20-2.60g sodium sulfide nonahydrate and 0.68-0.74g molybdenum trioxide in 20ml deionized water, then stirring on magnetic stirrer, and adding 2.2-2.6ml graphite oxide to obtain mixed solution. The mixed solution is subjected to ultrasonication fo 10-20 min, then transferred to a stainless steel reaction kettle, and placed the sealed reaction kettle in an electronic oven then heated at 180-220 degrees C for 40-80 minutes to obtainMoS2/RGO composite material. The obtained MoS2/RGO composite material is washed with deionized water for 2-6 times, then with ethanol for 1-3 times to obtain black precipitate. USE - Method for preparing nanoporous nickel-molybdenum disulfide/graphene composite material used as catalyst for electrochemical testing (claimed). ADVANTAGE - The method enables to prepare nanoporous nickel-molybdenum disulfide/graphene composite material, which allows to get catalyst, which is cost-effective. DETAILED DESCRIPTION - The black precipitate is placed in a vacuum oven at temperature of 40-80 degrees C for 10-14 hours to obtain pure hydrothermal MoS2/RGO composite. The nickel(II) hydroxide powder is obtained by dissolving 1.4-1.5g nickel(II) nitrate hexahydrate and 1.3-1.5g hexamethylenetetramine (HMT) in 30-40ml ultrapure water, then stirring uniformly by magnetic stirrer and transferred to a stainless steel reaction kettle. The sealed reaction kettle is placed in an electronic oven at a temperature of 80-120 degrees C for 8-12 hours, and the obtained green nickel(II) hydroxide powder is washed with water and ethanol, and then dried in vacuum drying oven. The nickel(II) hydroxide powder and MoS2/RGO are thoroughly crushed and subjected to uniform mixing in an agate mortar to obtain mixture. The mixture is placed in a tube furnace and insulated at 450-550 degrees C in an argon/hydrogen mixed atmosphere for 4-6 hours to obtain desired product. An INDEPENDENT CLAIM is included for a method of using nanoporous nickel-molybdenum disulfide/graphene composite composite as a catalyst for electrochemical testing, which involves (A) dispersing 1.5-2.5mg NPNi-MoS2/RGO composite catalyst in 0.4~0.6ml water/isopropanol/naphthol solution, then ultrasonicating for 20-40 minutes to obtain catalyst solution, the taking out 20-40 mu l catalyst solution and dropping on a glassy carbon electrode and drying at room temperature to form uniform catalyst film; (B) performing electrochemical testing in a standard three-electrode test system in which the electrode prepared is used as the working electrode, carbon rod electrode is used as counter electrode, the calomel electrode is used as reference electrode, where concentration of sulfuric acid is 0.4-0.6 M, which is used as an electrolyte; (C) using NPNi-MoS2/RGO composite material as a working electrode for testing on the CHI660E electrochemical workstation, then performing polarization curve test on a rotating disk electrode with a rotation speed of 2025 revolutions/minute, and scanning potential with respect to the reversible hydrogen electrode, where the range is 0 to -0.8 Volt, and the scanning speed is 5mV/second, when the cyclic voltammetry test is performed, the potential scanning range with respect to the reversible hydrogen electrode is -0.15 to 0.1 Volt, and the scanning speed is 100 mV/second; (D) performing current-time curve test at a constant voltage of -0.19 Volt with respect to potential of the reversible hydrogen electrode, and the scan time is 30,000 seconds; and (E) using prepared NPNi-MoS2/RGO composite as a catalyst for hydrogen evolution reaction at a starting potential of 85 mV, under same current density, where its catalytic performance is superior to that of MoS2, MoS2/RGO and NPNi-MoS2 obtained under the same conditions.