Abstract：Ni and Co co-doped amorphous selenide was synthesized on nickel mesh as hydrogen evolution catalyst electrode by electrode position method, and the morphology and microstructure of NiCoSe electrode were observed and analyzed by scanning electron microscopy, X-ray diffractometer, transmission electron microscopy and X-ray photoelectron spectrometer, and the electrocatalytic hydrogen evolution performance of the electrode was tested by electrochemical experiments. The results show that the NiCoSe electrode surface is embedded with NiCoSe spherical particles, and no obvious cracks. NiCoSe compound is amorphous and can provide more low-energy barrier cavities. The appropriate ratio of Ni and Co co-doping can modulate the electronic structure of Se to shift the electronic binding energy of the catalyst, which in turn enhances the adsorption ability of the catalyst to H atoms, resulting in a higher intrinsic catalytic activity of the NiCoSe hydrogen evolution catalyst electrode. At a current density of 10 mA/cm2 in 1 mol/L KOH solution, the overpotential of the NiCoSe cathode is 83 mV, and the Tafel slope is 108.98 mV/dec. The step controlling the reaction rate is the adsorption process of the catalyst on H atoms. The current density decay rate is less than 5% after 60 h electrolysis.
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2023, Vol. 28 
