▎ 摘　　要

NOVELTY - Preparing phosphorus-doped graphene-supported nickel-platinum nanocatalyst involves preparing an aqueous solution of graphene oxide (GO) with a concentration of 3-9 mg/mL and treating ultrasonically to obtain uniformly dispersed GO aqueous solution. Dipotassium hydrogen phosphate (K2HPO4) is added to the GO aqueous solution and continuously stirred for 1-10 minutes to obtain mixed solution A, where dipotassium hydrogen phosphate is added in an amount of 30-60 mg for every 5-10 mL of GO aqueous solution. Nickel(II) chloride hexahydrate and potassium hexachloroplatinate solutions are added in molar ratio of 1:(0.4-0.8), preferably 1:0.66, to solution A and stirred continuously for 1-5 minutes to obtain mixed solution B, where 0.04-0.1 mmol NiCl26H2O is added for every 20-60 mg GO. Sodium borohydride (NaBH4) is added as a reducing agent to the mixed solution B and continuously stirred for 5-15 minutes to perform a reduction reaction. USE - Method for preparing phosphorus-doped graphene-supported nickel-platinum nanocatalyst for generating hydrogen gas by catalyzing the hydrolysis reaction of hydrazine borane (claimed). ADVANTAGE - The method enables to prepare phosphorus-doped graphene-supported nickel-platinum nanocatalyst that shows higher catalytic activity and cycling stability in the decomposition reaction of hydrazine borane. The synthetic process is simple, short, and convenient. DETAILED DESCRIPTION - Preparing phosphorus-doped graphene-supported nickel-platinum nanocatalyst involves preparing an aqueous solution of graphene oxide (GO) with a concentration of 3-9 mg/mL and treating ultrasonically to obtain uniformly dispersed GO aqueous solution. Dipotassium hydrogen phosphate (K2HPO4) is added to the GO aqueous solution and continuously stirred for 1-10 minutes to obtain mixed solution A, where dipotassium hydrogen phosphate is added in an amount of 30-60 mg for every 5-10 mL of GO aqueous solution. Nickel(II) chloride hexahydrate and potassium hexachloroplatinate solutions are added in molar ratio of 1:(0.4-0.8), preferably 1:0.66, to solution A and stirred continuously for 1-5 minutes to obtain mixed solution B, where 0.04-0.1 millimoles NiCl26H2O is added for every 20-60 mg GO. Sodium borohydride (NaBH4) is added as a reducing agent to the mixed solution B and continuously stirred for 5-15 minutes to perform a reduction reaction to obtain a mixed solution C, where 20-60 mg of sodium borohydride is added to every 5-10 mL of mixed solution B. The mixed solution C is magnetically stirred and reduced at room temperature until no more bubbles are generated to obtain the desired phosphorus-doped graphene-supported nickel-platinum nanocatalyst. INDEPENDENT CLAIM is included for an application of the phosphorus-doped graphene loaded nickel-platinum nanometre catalyst, which involves: a. adding sodium hydroxide solution into the prepared catalyst; b. adding hydrazine borane solution under stirring; and c. completely catalyzing hydrolysis of hydrazine borane at the temperature of 30-60degrees Celsius and under the normal pressure condition within 0.05-10 minutes, where every 0.5-2.0 mL of sodium hydroxide solution is added into 0.1-1 mmol of catalyst, concentration of the hydrazine borane solution is 0.1-2.0M, molar ratio of the catalyst to hydrazine borane is 0.05-1:1, and molar weight of the catalyst is calculated by the sum of the molar weights of the two elements nickel (Ni) and platinum (Pt).