▎ 摘　　要

NOVELTY - Preparing a noble metal alloy/reduced graphene oxide complex material comprises e.g. (1) mixing the aqueous solution A, aqueous solution B and n-octane into the microchannel reactor and reacting, (2) mixing the aqueous solution C into the microchannel reactor and continue to reacting, where the aqueous solution C is a mixed aqueous solution of sodium borohydride and sodium hydroxide, the ratio of the molar concentration of sodium borohydride in aqueous solution C to the total molar concentration of metal ions in aqueous solution A is 5: 1-20: 1, the molar concentration of sodium hydroxide in the aqueous solution C is 1.5-20 mmol/l, the volume flow rate of the aqueous solution C is equal to the volume flow rate of the aqueous solution A, and (3) centrifuging and washing the obtained product to obtain a precious metal alloy/reduced graphene oxide complex material, where the reaction temperature of the microchannel reactor is 55-100 degrees C. USE - The noble metal alloy/reduced graphene oxide complex material is useful in catalytic reduction of p-nitrophenol (claimed). ADVANTAGE - The method: is and simple; and has continuous process, mild reaction condition, wide applicability, and short residence time. The complex material has small average particle size of alloy nanoparticles, narrow particle size distribution, and good repeatability between batches. DETAILED DESCRIPTION - Preparing a noble metal alloy/reduced graphene oxide complex material comprises (1) mixing the aqueous solution A, aqueous solution B and n-octane into the microchannel reactor and reacting, where the aqueous solution A is composed of metal precursor 1, metal precursor 2, polyvinylpyrrolidone, graphene oxide and water, the total molar concentration of the metal ion is 0.25-1 mmol/l, the mass concentration of polyvinylpyrrolidone is 0.8-3.2 g/l, the ratio of the total mass of metal ions in the aqueous solution A to the mass of graphene oxide is 0.66: 1-0.06: 1, the aqueous solution B is a mixed aqueous solution of sodium borohydride and sodium hydroxide, the ratio of the molar concentration of sodium borohydride in aqueous solution B to the total molar concentration of metal ions in aqueous solution A is 1: 1-5: 1, the molar concentration of sodium hydroxide in the aqueous solution B is 1.5-10 mmol/l, the volume flow rates of the aqueous solution A and the aqueous solution B are equal, the volume flow rate is 0.05-1.5 ml/minutes, and the ratio of the volume flow rate of n-octane to the total volume flow rate of aqueous solution A and aqueous solution B is 0.16: 1-6: 1, (2) mixing the aqueous solution C into the microchannel reactor and continue to reacting, where the aqueous solution C is a mixed aqueous solution of sodium borohydride and sodium hydroxide, the ratio of the molar concentration of sodium borohydride in aqueous solution C to the total molar concentration of metal ions in aqueous solution A is 5: 1-20: 1, the molar concentration of sodium hydroxide in the aqueous solution C is 1.5-20 mmol/l, the volume flow rate of the aqueous solution C is equal to the volume flow rate of the aqueous solution A, and (3) centrifuging and washing the obtained product to obtain a precious metal alloy / reduced graphene oxide complex material, where the reaction temperature of the microchannel reactor is 55-100 degrees C. An INDEPENDENT CLAIM is also included for noble metal alloy/reduced graphene oxide complex material.