▎ 摘　　要

NOVELTY - Preparing loading palladium-nickel nano-catalyst on double carrier comprises (1) calcining the carbon nanotubes and urea at 230-300℃ for 1-6 hours in air atmosphere to obtain nitrogen-doped carbon nanotubes, (2) adding 10-60 mg nitrogen-doped carbon nanotubes (NCNTs) and 10-60 mg graphene oxide (GO) solutions to 10-50 ml deionized water, and ultrasonically treating for 10-30 minutes to obtain mixed solution A, (3) adding 0.1-0.8 ml 8-aminopyrene-1,3,6-trisulfonic acid trisodium salt (APTS) to the 10-20 ml mixed solution A in the step (2), (4) adding the 0.01-0.05 mmol sodium tetrachloropalladate and nickel (II) chloride solutions into 10-20 ml mixed solution B, and stirring for 10-30 minutes to obtain the mixed solution C, (5) adding 20-60 mg sodium borohydride as reducing agent to 15-25 ml mixed solution C in the step (4), and magnetically stirring for reduction to obtain mixed solution D, and (6) centrifuging, and washing with water. USE - The catalyst is useful in catalyzing hydrogen production reaction of formic acid decomposition at room temperature (claimed). ADVANTAGE - The catalyst has higher catalytic activity and cycle stability in the hydrogen production reaction of formic acid, simple synthesis process and operation, and short synthesis period. DETAILED DESCRIPTION - Preparing loading palladium-nickel nano-catalyst on double carrier comprises (1) calcining the carbon nanotubes and urea at 230-300℃ for 1-6 hours in air atmosphere to obtain nitrogen-doped carbon nanotubes, where the mass ratio of carbon nanotube and urea is (1-3):(1-3), (2) adding 10-60 mg nitrogen-doped carbon nanotubes (NCNTs) and10-60 mg graphene oxide (GO) solutions to 10-50 ml deionized water, and ultrasonically treating for 10-30 minutes to obtain mixed solution A, (3) adding 0.1-0.8 ml 8-aminopyrene-1,3,6-trisulfonic acid trisodium salt (APTS) to the 10-20 ml mixed solution A in the step (2), and continuously stirring for 10-30 minutes to obtain mixed solution B, (4) adding the 0.01-0.05 mmol sodium tetrachloropalladate and nickel (II) chloride solutions into 10-20 ml mixed solution B, and stirring for 10-30 minutes to obtain the mixed solution C, where the molar ratio of sodium tetrachloropalladate and nickel (II) chloride is (1-9):1, (5) adding 20-60 mg sodium borohydride as reducing agent to 15-25 ml mixed solution C in the step (4), and magnetically stirring for reduction for 20-60 minutes to obtain mixed solution D, and (6) centrifuging when the mixed solution D in the step (5) has no bubbles at room temperature, washing with water, and obtaining palladium-nickel nanocatalyst (PdNi/NH2-NC-G) loaded on dual carrier of nitrogen-doped carbon nanotubes and reduced graphene oxide. An INDEPENDENT CLAIM is also included for use method of the nano-catalyst, comprising dispersing the obtained 0.05-1 mmol catalyst in 5-20 ml deionized water, adding formic acid aqueous solution at temperature of 25-50℃ and normal pressure to catalyze the decomposition of formic acid to produce hydrogen, where the concentration of the formic acid aqueous solution is 0.1-5 M, and the molar weight of the catalyst is calculated by the sum of the molar weights of palladium and nickel.