Research on Building of Highly Efficient CoMo Bimetallic Sulfide Electrode and Electrocatalytic Hydrogen Evolution
CoMo porous alloy was firstly prepared by arc melting technology and dealloying method.After chemical vapor deposition of sulfur,the self-supported CoMo bimetallic sulfide electrode was obtained.The phase composition and microstructure were analyzed by XRD and SEM.The hydrogen evolution performance and stability of the electrode were tested by linear sweep voltammetry,chronopotentiometry,etc.The results show that the introduction of an appropriate amount of Mo element promotes the dense growth of CoMo sulfide nanowires,thereby increases the specific surface area and facilitates electron transport during the hydrogen evolution reaction.The catalyst exhibits excellent hydrogen evolution performance in acidic media.The Co13Mo2-S electrode reaches current density of 10 mA·cm-2 and 100 mA·cm-2 at low overpotential of 94 mV and 172 mV,and the Tafel slope is only 59 mV·dec-1.Besides,Co13Mo2-S electrode manifests good hydrogen evolution stability and durability.
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