▎ 摘　　要

NOVELTY - The sulfur and phosphorus co-doped growth graphene-coated nickel-cobalt-iron hydrogen evolution catalyst is composed of nickel, cobalt, iron and sulfur and phosphorus in the form of phosphorus sulfide, and is supported on carbon paper, which has nickel-cobalt-iron-sulfur-phosphorus compound doped carbon phosphorus of formula is (Ni_xCo_yFe_z)S_vP_u (I), where 0\~x/y\~10, 0\~x/z\~10, 0\~v\~10, 0\~u\~10. USE - Sulfur and phosphorus co-doped growth graphene-coated nickel-cobalt-iron hydrogen evolution catalyst used in various hydrogen evolution electrolysis water catalysis. ADVANTAGE - The integrated nickel-cobalt-iron-sulfur-phosphorus compound doped carbon phosphorus catalyst electrode shows very prominent HER activity, which has higher catalytic activity, higher hydrogen yield and more stable performance, and has the advantages of energy saving, environmental protection and low cost. The sulfur and phosphorus co-doped in-situ growth graphene-coated nickel-cobalt-iron hydrogen evolution catalyst is suitable for large-scale industrial production due to its simple preparation method, low energy consumption and abundant raw materials. DETAILED DESCRIPTION - The sulfur and phosphorus co-doped growth graphene-coated nickel-cobalt-iron hydrogen evolution catalyst is prepared by mixing nickel nitrate hexahydrate, cobalt nitrate hexahydrate, iron nitrate nonahydrate (III), urea, ammonium acetate, and ultrapure water according to the proportion of 1-10 mmol, 1-8mmol, 1-15 mmol, 1-12 mmol, 0.5-5 mmol and 50-550 ml and stirring evenly to form a mixed solution, putting the carbon paper into acetic acid or hydrochloric acid solution with a concentration of 1-3 molL-1 and ultrasonically treating for 30-120 minutes, using hydrogen peroxide and deionized water for ultrasonic cleaning and putting in a 70?oC oven and drying for 0.5-1 hour to obtain the treated carbon paper, putting the treated carbon paper in the mixed solution, taking out the carbon paper after reacting at 110-300?oC for 15-35 hours in a hydrothermal manner, cleaning and drying at a temperature of 50-90?oC for 8-16 hours to obtain a trimetal hydroxide catalyst supported on the carbon paper, putting the trimetal hydroxide catalyst supported on carbon paper in a tube furnace, under the protection of nitrogen and/or argon, passing carbon disulfide under the protection of nitrogen and/or argon, and heating at 300-650?oC for 1-3 hours to obtain a nickel-cobalt-iron trimetallic catalyst supported on carbon paper with growth of graphene sulfide, placing the nickel-cobalt-iron trimetallic catalyst and sodium hypophosphite supported on carbon paper with growth of graphene sulfide below and above the tube furnace respectively, where the sodium hypophosphite is 50-100 times the quality of carbon paper, increasing the temperature at a rate of 1-5?oC/minute, heating at a temperature of 300-650?oC for 1-3 hours, and decreasing the temperature at a rate of 1-10?oC/minute.