PLASMA TREATED VANADIUM DOPED NICKEL-IRON BASED ELECTROCATALYST FOR EFFICIENT HYDROGEN EVOLUTION
In this study,V-doped nickel-iron layered double hydroxide(NiFe LDH)grows in situ on the surface of nickel foam by one-step hydrothermal method,combines with H2 plasma reduction,to construct a heterostructure of Ni nanoparticles anchored to a large number of oxygen vacancies and nickel vacancies,increase the number of active sites,and enhance the HER activity of NiFe LDH.The results show that the overpotential of the catalyst at a current density of 10 mA/cm2 in a 1 mol/L KOH electrolyte is only 37.5 mV,and the Tafel slope is 49 mV/dec,and its hydrogen evolution activity is not significantly attenuated after 100 h constant current test.In addition,it also has good hydrogen evolution activity and stability in the total hydrolysis test,and the total hydrolysis voltage at a current density of 10 mA/cm2 is only 1.57 V,and its hydrogen evolution activity does not decrease significantly after 1000 h constant current test.
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