Preparation Of Porous Ni-Co Alloy And Ni-Co-Sn Alloy Electrode And Its Electrocatalytic Activity For Hydrogen Evolution

As fossil fuel reserves are limited and non-renewable in the short term,the development of clean and renewable energy sources is imminent.Hydrogen energy has attracted wide attention due to its advantages such as wide source,storage and transportation.Among mature hydrogen production technology,hydrogen production from water splitting is considered to be the most promising technology due to its easy control and operation.However,there are still many shortcomings in hydrogen production by electrolyzed water,especially the hydrogen evolution overpotential of the catalyst electrode:High,and reducing catalytic efficiency,limiting the applications of hydrogen production from electrolytic water in practical production.Based on the original Ni-Co alloy,this paper considers the factors of energy and geometry to improve the catalytic activity of the catalytic electrode.Porous Ni-Co and ternary Ni-Co-Sn electrodes were prepared respectively by Dynamic template method and electrodeposition.The samples were characterized by SEM,EDS and other methods,and the hydrogen evolution action of different samples in 1M KOH solution was explored.The main research results are as follows:1.The porous Ni-Co electrode was successfully prepared by the Dynamic template method,and the effects of deposition current density,deposition time,and plating solution Ni²⁺:Co²⁺concentration ratio on its morphology and performance were investigated.The best parameters were250ASD,20s,and Ni Cl₂ 20g/L,Co Cl₂ 20g/L.The optimal hydrogen evolution overpotential of the obtained porous Ni-Co was-38m V,which was significantly better than that of other reported Ni-Co electrodes with different structures.2.Ni-Co-Sn alloy electrode was successfully prepared by electrodeposition,and the effects of Sn²⁺concentration,deposition current density,and deposition temperature on the morphology and performance of the electrode were explored.The best parameter was1g/L Sn Cl2,2.5ASD,T=58℃in order.The optimal hydrogen evolution overpotential of the obtained Ni-Co-Sn is-139m V,which is superior to the reported Ni-Co and Ni-Sn binary alloy electrodes.3.From the perspective of geometry and energy,adjusting the morphology and element types of Ni-Co electrodes can improve their catalytic hydrogen evolution performance and provide a certain reference for the study of cathode catalytic materials.