▎ 摘　　要

NOVELTY - Preparation of preferential oxidation of carbon monoxide under hydrogen-rich condition monolithic catalyst comprises preparing three-dimensional (3D) network polystyrene template having volume porosity of 60-75%; preparing graphene-chloroplatinic acid-nitrosylruthenium nitrate aqueous solution, soaking polystyrene template, vacuumizing through vacuum pump until no more air bubbles on surface of solution, oven drying template, repeating vacuumizing and drying steps for 3- 5 times to obtain conductive 3D network polystyrene template; soaking template as cathode to plating nickel-containing solution, subjecting to electrodeposition using unipolar pulse plating and inert graphite electrode as anode, placing to tube furnace, calcining to 100 degrees C at rate of 5 degrees C/minute for 30 minutes, and increasing temperature to 600 degrees C at rate of 30 degrees C/minute for 12-24 hours under 5 wt.% hydrogen-nitrogen mixed gas atmosphere; and cooling to 300 degrees C for 2 hours, aerating, and cooling to room temperature. USE - The method is for preparation of preferential oxidation of carbon monoxide under hydrogen-rich condition monolithic catalyst. ADVANTAGE - The monolithic catalyst is suitable for small on-site hydrogen supply equipment, can effectively avoid hot spots, effectively reduces volume of carbon monoxide in hydrogen-rich gas preferentially oxidation reactor, and has good low-temperature catalytic activity, 100% carbon monoxide conversion at 90-170 degrees C, 50% selectivity, high mechanical strength, and good thermal conductivity.