▎ 摘　　要

NOVELTY - Method for preparing monolithic catalyst by (i) preparing three-dimensional network polystyrene template, (ii) configuring graphene-cobalt nitrate solution, (iii) immersing the polystyrene template in the graphene-cobalt nitrate aqueous solution, vacuum-filling, drying, repeatedly filling to obtain filled conductive three-dimensional network polystyrene template, (iv) using filled template as cathode, inert graphite electrode as anode, and immersing the electrode in a plating solution containing nickel, and performing electrodeposition, (v) placing the electroplated polystyrene in a tubular furnace, roasting under the nitrogen condition to obtain template-free monolithic catalyst precursor, (vi) using the catalyst precursor as cathode, platinum wire as anode, and electroplating solution as an aqueous solution containing sodium sulfate and sulfuric acid, performing electrodeposition, and air-drying the cathode, and (vii) ventilating the cathode in a hydrogen-nitrogen mixed gas. USE - The catalyst is used for hydrogen production from ethanol steam reforming. ADVANTAGE - The catalyst has excellent catalytic activity, high mechanical strength, high catalytic activity and excellent thermal conductivity, ensures 100% ethanol conversion rate at 550-700 degrees C, and reduces the temperature of the catalyst's complete conversion. DETAILED DESCRIPTION - Method for preparing monolithic catalyst involves (i) preparing three-dimensional network polystyrene template, where the volume porosity of the template is 60-75%, (ii) configuring graphene-cobalt nitrate solution, (iii) immersing the polystyrene template in the graphene-cobalt nitrate aqueous solution obtained in step (ii), vacuum-filling using vacuum pump until no bubbles emerge on the surface of the polystyrene immersed in the solution, and drying in an oven, repeatedly filling and drying for 3-5 times to obtain filled conductive three-dimensional network polystyrene template, (iv) using filled template as cathode, inert graphite electrode as anode, and immersing the electrode in a plating solution containing nickel, and performing electrodeposition using unipolar pulse plating, (v) placing the electroplated polystyrene in a tubular furnace, carrying out a program of heating and roasting treatment under the nitrogen condition, heating a 100 degrees C at a rate of 5 degrees C/minutes, maintaining for 0.5 hour, and heating at 3 degrees C/minute for 600oC, holding time 12-24 hours, removing polystyrene template by pyrolysis to obtain template-free monolithic catalyst precursor, (vi) using the catalyst precursor obtained in step (v) as the cathode, platinum wire as anode, and electroplating solution as an aqueous solution containing sodium sulfate and sulfuric acid, performing electrodeposition under a current density of 300-400 A/m2 for 1-2 hours at 40-50 degrees C, after electrodeposition, washing and air-drying the cathode, and (vii) placing the cathode treated in step (vi) in a hydrogen-nitrogen mixed gas with an atmosphere of 5 wt.% hydrogen in a tube furnace, after constant temperature reduction at 600 degrees C for 2 hours, at a mixed gas flow rate of 30 ml/minute, stopping heating, continuously ventilating and obtaining the product at room temperature. An INDEPENDENT CLAIM is included for a monolithic catalyst comprising three-dimensional network electrodeposited nickel support, platinum, cobalt, and graphene active components supported on the surface of the support.