Preparation Of Transition Metal Composite Electrode Materials And Study On HER Properties

Energy is the driving force for the development of human society.With the development of economy and society,the demand of human society for resources has been increasing.The excessive exploitation and use of earth’s resources have led to serious environmental pollution and resource scarcity,which has laid a hidden danger for the sustainable development of human society.It is imperative to explore new clean energy development and utilization technologies,among which hydrogen has been widely researched with various advantages,and hydrogen production by electrolysis of water is the most widely used method.In this paper,the performance of transition metal sulfide compounds（TMDCs）for catalytic hydrogen precipitation under alkaline conditions was experimentally investigated by using alkaline electrolytic water as the hydrogen precipitation preparation method.Transition metal sulfide compounds are inexpensive and abundant raw materials for production,and have good electrochemical properties,which are expected to be an alternative to electrocatalytic hydrogen precipitation materials.The introduction of sulfur atoms improves the synergistic effect between transition metals,and the introduction of tellurium atoms can improve the interlayer spacing between substances,thus achieving the effect of reducing the resistance of material materials.The specific experiments are as follows.1.Transition metal composite electrode materials were produced by simple hydrothermal method with graphene oxide as the carrier and thiourea as the sulfur source by sulfide-loading Mo,Ni and Co elements on graphene oxide.The materials were subjected to various characterization and electrochemical tests,and it was found that there were a large number of pores and folds on the surface of the materials,which increased the specific surface area of the materials and increased the catalytic active sites;the electrochemical performance of GO-2MS,2NS,2CS was tested in 1.0 mol/L KOH electrolyte solution with good catalytic performance under alkaline conditions.It reached an overpotential of 283.2 m V at a current density of 10 m A/cm~2 and had a good current response in the scan range.In addition,the synthetic material has good capacitance retention and low charge transfer resistance,but the overpotential increases before and after stability testing and the current response significantly decreases stability to be further optimized.2.The transition metal tellurides were firstly prepared by a simple hydrothermal method,and then sintered with high purity tellurium powder at 700°C under nitrogen atmosphere to introduce Te atoms to prepare catalytic materials with low charge transfer resistance and high catalytic activity.the introduction of Te atoms on the one hand increases the material layer spacing and reduces the transfer resistance,and on the other hand changes the coordination mode between the elements to play a good synergistic effect.At a current density of 10 m A/cm~2,the hydrogen precipitation overpotential of GO-1MT,2NT,3CT was 191.7 m V with a low Tafel slope of 42.05m V/dec,and it showed a high catalytic activity and good stability performance after1500 times of CV curve stability test.