Study Of Preparation And Performance Of Copper Foam-based Nickel/Binary Particles Composite Electrodeposited Layer As HER Catalyst

As a kind of green and clean energy,hydrogen is regarded as a new sustainable energy carrier.Hydrogen,with its high energy density,also emits no carbon when used,making it the most promising alternative to fossil fuels.Among the many methods of hydrogen synthesis,hydrogen production by electrolytic water can achieve zero carbon emission,which is a green and pollution-free method of hydrogen production.Due to the high price of Pt and other precious metals,it is difficult to apply them in industry on a large scale.The size of transition metal sulfides and transition metal oxides is easy to control,which can be used as new non-precious metal hydrogen evolution catalysts to replace precious metals.In this paper,Mo S₂/Ni O and Co₃O₄/Ni O binary particles are synthesized by electrodeposition using copper foam as matrix,and the preparation mechanism,catalytic performance and hydrogen evolution mechanism of the nickel/binary particles are studied in depth.First of all,this paper uses orthogonal experiment to design the experiment of copper foam-based（Mo S2/Ni O）@Ni hydrogen evolution catalytic material and copper foam-based（Co3O4/Ni O）@Ni hydrogen evolution catalytic material and analyzes the importance of various factors（particle concentration,deposition time and deposition voltage）.The morphology and structure of electrodeposited layers of copper foam-based（Mo S₂/Ni O）@Ni hydrogen evolution catalytic materials and copper foam-based（Co₃O₄/Ni O）@Ni hydrogen evolution catalytic materials and the distribution of elements in the electrodeposited layer section were observed,and the preparation mechanism was explored by using the wavelet transform and noise resistance in electrochemical noise technology.Secondly,electrochemical testing methods such as polarization curve,cyclic voltammetry curve,electrochemical impedance spectrum and electrochemical noise were adopted in this paper to explore that the main influencing factor of copper foam（Mo S₂/Ni O）@Ni hydrogen evolution catalytic material is deposition voltage.The optimal process is Mo S₂ particle concentration of 10g/L,Ni O particle concentration of10g/L,deposition time of 15min,deposition voltage of 3V.The main influencing factor of Co₃O₄/Ni O@Ni hydrogen evolution catalytic material was determined.The optimal process was Co₃O₄ particle concentration 5g/L,Ni O particle concentration 5g/L,deposition time 10min and deposition voltage 7V.Finally,the results of electrochemical noise wavelet analysis show that the alkaline electrolytic hydrogen evolution performance of copper foam supported（Mo S₂/Ni O）@Ni material prepared by the best process is better than that of other copper foam supported hydrogen evolution catalytic materials.The cyclic voltammetry results also show that the copper foam-based（Mo S₂/Ni O）@Ni hydrogen evolution catalytic material has the largest electrochemical active area,the smallest cathode tabfil slope,the smallest charge transfer resistance and the smallest deposition relative energy.It has been proved that the composite deposition of Mo S₂/Ni O and Co₃O₄/Ni O particles can increase the electrochemical active area of copper foam supported hydrogen evolution catalytic materials,reduce the Tafel slope and charge transfer resistance,reduce the energy consumed during hydrogen evolution,and improve the catalytic performance of hydrogen evolution materials.