The invention discloses a
nickel-doped
cobalt selenide electrocatalytic
hydrogen evolution catalyst and a preparation method thereof, and relates to an electrocatalytic
hydrogen evolution catalyst anda preparation method thereof. The invention aims to solve the technical problems of complex preparation steps, high cost and poor safety of existing
cobalt selenide-doped electrocatalytic
hydrogen evolution catalysts. The general
chemical formula of the catalyst is CoxNiySe2, wherein x is in a range of 0.6-0.8, and y is in a range of 0.1-0.35. The preparation method comprises the following steps:dissolving
selenium powder in a
potassium hydroxide solution, then adding Co(NO3)2.6H2O, Ni(NO3)2.6H2O,
ethylene diamine tetraacetic acid-2Na (EDTA-2Na) and
ultrapure water, carrying out uniform stirring to obtain a
mixed solution, transferring the
mixed solution into a reaction kettle for a
hydrothermal reaction, and then carrying out cleaning and
drying to obtain the catalyst. The overpotentialof the catalyst reaches 170-195 mV VS RHE, and after 1000 circles of continuous
cyclic voltammetry tests, a polarization curve is almost overlapped with an
initial curve, so that stability is high, and the catalyst can be used in electrocatalytic
hydrogen evolution reactions.