▎ 摘　　要

NOVELTY - Preparing graphene aerogel high-efficiency hydrogen evolution composite material involves weighing amount of cobalt(II) nitrate, nickel(II) nitrate, sodium alginate and GO powder is adjusted by the cooperation of sodium alginate solution and metal cobalt (Co) and nickel (Ni) aging time process parameters. Forming alginate hydrogel, lyophilization and further high-temperature phosphating to form bimetallic NiCoP@carbon aerogel, where P is phosphorus. The high-temperature phosphating further improving the electron conduction rate by controlling the amount of specific graphene oxide added, and finally forming NiCoP@graphene aerogel greatly improves its electrochemical catalytic performance. The weigh cobalt(II) nitrate and nickel(II) nitrate are dissolved in deionized water and stir to form cobalt(II) nitrate and nickel(II) nitrate mixed solution A. USE - Method for preparing graphene aerogel high-efficiency hydrogen evolution composite material used for generating hydrogen and hydrogen evolution catalyst (claimed). ADVANTAGE - The method enables to prepare graphene aerogel high-efficiency hydrogen evolution composite material, which has low cost, simple preparation process, and is easy to use in industria to produced on a large scale and has excellent electrocatalytic activity and good hydrogen evolution stability, and is environmentally friendly. DETAILED DESCRIPTION - The weighed sodium alginate (SA) is poured into deionized water to form a uniform sodium alginate solution B, and weigh GO powder into sodium alginate solution B, stir and ultrasonically obtain dispersion C. The certain volume of solution C is dropped into solution A at room temperature to form a hydrogel, and the formed hydrogel is aged and then soaked with deionized water and ethanol, and washed, aging, soaking, and washing the hydrogel in a freeze dryer until it forms a xerogel. Taking dry gel and red phosphorus respectively, red phosphorus is placed in the upstream position of the tube furnace, the dry gel is placed downstream, and high temperature phosphating is performed to finally obtain graphene aerogel high-efficiency hydrogen evolution composite material. The mass ratio of cobalt(II) nitrate, nickel(II) nitrate and deionized water is 1:1:80, and mass ratio of sodium alginate to cobalt(II) nitrate is 4:5, and the mass ratio of sodium alginate to deionized water is 1:100, and mass ratio of GO to sodium alginate is 1:5.