Synthesis Of Sulfide Composite Electrocatalysts For The Efficient Preparation Of Hydrogen Energy

With the development of social economy,the demand for energy is increasing.The non-renewable energy of fossil energy limits the sustainable development of the economy,and the pollution caused by the use of fossil energy also puts forward higher requirements for the development of new energy.For that we have created a lot of renewable energy sources,such as solar power wind and tidal power.Hydrogen as a new energy has a broad application prospect and advantages of hydrogen is not only the product of pollution-free after combustion and water as the raw material for producing hydrogen is abundant in the earth.The currently accepted high efficient catalyst is to use metal palladium as a catalyst,but as a result of the metal palladium is expensive,makes its application for its production is very unrealistic,so find a new type of catalyst which is stable and low prices is particularly important.High activity and good stability are the main standard of the electrolytic hydrogenation catalyst,and the two kinds of catalysts introduced in this paper all have good performance and stability.This paper mainly studies the morphology,composition and electrochemical activity of Ni3S2|POM-P123|NF composite materials and Co0.85Se/MoSe2 nano-composite materials,which can be divided into the following two parts:1.Preparation,characterization and testing of Ni3S2|POM-P123|NF composite materials.First,the Ni3S2|POM-P123|NF composite was prepared by hydrothermal reaction.Scanning electron microscope,X-ray apparatus,transmission electron microscopy(tem),X-ray photoelectron spectroscopy analysis method,had been used to characterize the structure,morphology and element valence of Ni3S2|POM-P123|NF composite materials.Finally,the electrocatalytic activity of the target material under alkaline conditions was tested by means of linear scanning,tafel curve and ac impedance spectroscopy.When the potential more than 0.165 V,the target material Ni3S2|POM-P 123 |NF’s current density is bigger than the same load metal Pt,we can know that under the same loading capacity Ni3S2|POM-P123|NF has more excellent catalytic activity.2.Preparation,characterization and testing of Co0.85Se/MoSe2 micro nanorods materials.First,CoMoO4 micro nanorods prepared by one step of hydrothermal method,and then the CoMoO4 precursor was selenized by hydrothermal method and our target product Co0.85Se/MoSe2 nano-composite was prepared.We obtained satisfactory results in the electrochemical performance testing of the precursor and the composite.Compared with the nickel foam and the precursor CoMoO4 nano-bar,Co0.85Se/MoSe2 micro/nano composite material has more perfect electrochemical activity(The current density of the base foam nickel was 154 mA/cm2 when the electric potential was 0.25 V)and smaller Tafel slope(81 mV dec-1).In order to verify the stability of the material,we carried out the 2000 cycle CV test and the i-t test for 20 h,and the results showed that the material had good stability.Compared with the related single CoSe and MoSe2,the material Co0.85Se/MoSe2 showed better catalytic performance.According to the data of various aspects,the new nanometer Co0.85Se/MoSe2 composite material has a very good application prospect in the application of electrolytic hydrogenation catalyst.