Study On The Application Of Composite Electrode With Foam Ni As Substrate In SPE Electrolytic Water Hydrogen Production

As a popular research direction in hydrogen production from electrolytic water,the development and utilization of composite electrodes for hydrogen precipitation has received the most attention.Efficient composite electrodes for hydrogen precipitation are particularly important for the improvement of hydrogen production efficiency from electrolytic water.In this paper,a composite electrode based on Ni foam is prepared by electrochemical deposition method,and the performance analysis and application study of the composite electrode in hydrogen production from electrolytic water are carried out.The article analyzes and compares the electrolytic water hydrogen production,the theory of composite electrode action and different electrolytic cells,etc.Finally,the composite electrode based on foam Ni is prepared by electrochemical deposition method,and the performance analysis is carried out by shape measurement laser microscopy system,XRD,SEM,XRF,XPS,etc.The best preparation conditions of the composite electrode were determined:50℃water bath heating,60m A/cm~2current density,120min deposition time;the characterization results show that the foam Ni and its composite electrode have a mesh structure,which can provide a smooth transmission channel for gas-liquid diffusion,and the surface of the composite electrode is uniform Ly loaded with Pt metal,which has good stability and catalytic performance of hydrogen precipitation.The hydrogen production performance of the composite electrode was studied by SPE electrolytic water hydrogen production experiments,and the following conclusions were drawn with the evaluation criteria of hydrogen production efficiency,hydrogen production and power consumption.1.in the experiment of hydrogen production with different electrodes as cathodes,foam Ni with 0.3mm thickness and 0.23mm pore size is selected as the base of composite electrode,and the best combination of cathode and anode for hydrogen production efficiency and hydrogen production is:cathode and anode with Ni,cathode Ir-Ni anode Pt-Ni composite electrode,and cathode Pt-Ni anode with Ni.2.In the hydrogen production experiments with different mass ratios of cathodes and anodes,the highest hydrogen production efficiency was achieved when the mass ratio of the anode Ir-Ni composite electrode was controlled at Ir:Ni=1:8,but the efficiency improvement was smaller in practical applications without electrochemical deposition of Ir,and the hydrogen production efficiency and hydrogen production were higher when the mass ratio of the cathode Pt-Ni composite electrode was Pt:Ni=1:12 than that of the single electrode Ni.3.In the experiments on the effects of materials on hydrogen production performance,the carbon cloth diffusion layer improved the hydrogen production efficiency by about 26.6%on average,and the SPE hydrogen production efficiency of the new proton exchange membrane increased by about 7%compared with the old membrane,and the hydrogen production efficiency and hydrogen production were higher than those of the composite electrode base foam Ni when the pore diameter was 0.045mm and thickness was 0.5mm,respectively,than those of the pore diameter 0.15,0.23mm and thickness 0.15,0.3mm of foam Ni,while the optimal experimental conditions were determined.4.In the stability verification experiment,the SPE hydrogen production device did not show no obvious decay due to the change of operation time and mode,and the hydrogen production performance is stable,which is conducive to the practicalization of the device in the future.The composite electrode based on foam Ni in this study showed excellent performance in both characterization analysis and hydrogen production experiments,which not only improved the hydrogen production efficiency and hydrogen production,but also reduced the power consumption,providing a strategy for the further development of electrolytic water hydrogen production technology.