▎ 摘　　要

NOVELTY - Gold-palladium-iridium/amino-nitrogen doped reduced graphene oxide catalyst, is prepared by doping gold-palladium-iridium nanoparticles on graphene carrier amino-nitrogen doped reduced graphene oxide modified with amino-nitrogen (-NH2-N) bifunctional group. USE - The catalyst is useful for producing hydrogen by formic acid hydrolysis. ADVANTAGE - The catalyst is prepared by one-step rapid reduction method at room temperature with short synthesis time and convenient operation; has extremely high catalytic activity without any additives, 100% formic acid conversion, 100% hydrogen selectivity and better cyclic stability, and complete decomposition of formic acid can be achieved within 0.75 minutes. The initial term turnover frequency (TOF) value of gold-palladium-iridium/amino-nitrogen doped reduced graphene oxide is 10224.9 h-1, which is much higher than the term turnover frequency value of gold-palladium/amino-nitrogen doped reduced graphene oxide. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing catalyst comprising (i) preparing graphene oxide in advance by Hummer's method, adding the prepared graphene oxide into a certain amount of water to obtain graphene oxide aqueous solution with a concentration of 1-5 mg/ml, and performing ultrasonic treatment for 15-30 minutes to obtain uniformly dispersed graphene oxide aqueous solution, (ii) adding 3-aminopropyl-triethoxysilane to the graphene oxide aqueous solution, continuously performing ultrasonic treatment for 5-15 minutes, and stirring to obtain mixed solution A, (iii) dissolving palladium chloride and sodium chloride in a molar ratio of 1:2 in certain amount of distilled water, and uniformly stirring to obtain brown-yellow disodium tetrachloropalladate aqueous solution, (iv) adding the prepared disodium tetrachloropalladate aqueous solution, chloroauric acid aqueous solution and iridium trichloride hydrate aqueous solution, adding to the mixed solution A, and continuously stirring to obtain mixed solution B, (v) adding 30-100 mg sodium borohydride as reducing agent to the mixed solution B, and stirring and reducing to obtain mixed solution C, and (vi) stirring the mixed solution C at room temperature and reducing in the air until the bubbles have completely disappeared, centrifuging at 8000-10000 revolutions/minutes for 3-5 minutes, and washing for 3-5 times to obtain catalyst; (2) use of catalyst for producing hydrogen by formic acid hydrolysis comprising formic acid aqueous solution has a concentration of 0.5-5 M, and gold-palladium-iridium/ amino-nitrogen doped reduced graphene oxide catalyst and formic acid in a molar ratio of 0.01-0.5; and (3) using catalyst for reacting formic acid aqueous solution to decompose hydrogen at room temperature, where the actual dosage of catalyst is 0.06 mmol, 245 ml gas is generated in 0.75 minutes, the gas comprises 1:1 mixture of hydrogen and carbon dioxide produced by the formic acid dehydrogenation reaction, conversion rate of formic acid is 100%, and hydrogen selectivity is 100%.