▎ 摘　　要

NOVELTY - Preparation method of nitrogen-phosphorus double-doped graphene-supported nickel-cobalt-palladium nanocatalyst involves (i) preparing aqueous solution of graphene oxide, and ultrasonically treating to obtain uniformly dispersed graphene oxide aqueous solution, (ii) adding nickel chloride, sodium tetrachloropalladate, cobalt nitrate and cerium nitrate solution to the graphene oxide aqueous solution, and stirring to obtain a mixed solution (A), (iii) adding 20-100 mg sodium phosphate monobasic dihydrate and 0.1-0.6 ml 3-aminopropyltriethoxysilane to the mixed solution (A) for every 15-25 ml, and continuing to stir to obtain a mixed solution (B), (iv) adding 20-60 mg sodium borohydride as a reducing agent to the mixed solution (B) for every 15-25 ml, and stirring for 5-15 minutes to perform a reduction reaction to obtain a mixed solution (C), and (v) magnetically stirring and reducing the mixed solution (C) at room temperature, and centrifuging and washing with water. USE - Method useful for preparation of nitrogen-phosphorus double-doped graphene-supported nickel-cobalt-palladium nanocatalyst for catalyzing room temperature hydrolysis of formic acid to produce hydrogen (claimed). ADVANTAGE - The catalyst has excellent catalytic activity for catalyzing the decomposition of formic acid to produce hydrogen, is safe, efficient and economical, and promotes the application of formic acid as a hydrogen storage material in real life. DETAILED DESCRIPTION - Preparation method of nitrogen-phosphorus double-doped graphene-supported nickel-cobalt-palladium nanocatalyst involves (i) preparing aqueous solution of graphene oxide with a concentration of 3-10 mg/ml, and ultrasonically treating to obtain uniformly dispersed graphene oxide aqueous solution, (ii) adding nickel chloride, sodium tetrachloropalladate, cobalt nitrate and cerium nitrate solution to the graphene oxide aqueous solution, and stirring for 5-15 minutes to obtain a mixed solution (A), where the molar ratio of nickel chloride, sodium tetrachloropalladate and cobalt nitrate is 1:(1-8):(1-3), and the added amount of nickel chloride is 0.02-0.2 mmol and the added amount of cerium nitrate is 10-30 mg for every 5-80 mg graphene oxide, (iii) adding 20-100 mg sodium phosphate monobasic dihydrate and 0.1-0.6 ml 3-aminopropyltriethoxysilane to the mixed solution (A) for every 15-25 ml, and continuing to stir for 1-10 minutes to obtain a mixed solution (B), (iv) adding 20-60 mg sodium borohydride as a reducing agent to the mixed solution (B) for every 15-25 ml, and stirring for 5-15 minutes to perform a reduction reaction to obtain a mixed solution (C), and (v) magnetically stirring and reducing the mixed solution (C) at room temperature, and centrifuging and washing with water when there are no bubbles to obtain the product (NiCoPd-CeOx/NPG). An INDEPENDENT CLAIM is included for a use of the nitrogen-phosphorus double-doped graphene-supported nickel-cobalt-palladium nano-catalyst for catalyzing room temperature hydrolysis of formic acid to produce hydrogen.