Rh-MoS2/泡沫镍电催化还原对氟苯酚OA北大核心CSTPCD

The MoS2/nickel foam electrode was prepared by electrodeposition.On this basis,the Rh-MoS2/nickel foam composite electrode was prepared by means of atomic doping.The structure,morphology and electrochemical properties of the electrode were characterized by various means.The effect of MoS2/nickel foam electrode on catalytic reduction of p-fluorophenol(4-FP)before and after Rh doping was compared to investigate the degradation mechanism of 4-FP.The characterization results show that:The doping of Rh promotes the conversion of 2H phase MoS2 to 1T phase MoS2,which improves the catalytic capability of MoS2;In 0.05 mol/L Na2SO4 solution,when the current density is 10 mA/cm2,the overpotential and Tafel slope of Rh-MoS2/nickel foam are 190.3 mV and 70 mV/dec respectively,which are much lower than those of MoS2/nickel foam.The experimental results show that:The removal rate of 4-FP by Rh-MoS2/nickel foam composite electrode is 96%under the conditions of working potential-1.3 V,initial pH 3.3,temperature 293 K and electrolysis time 180 min;The main active species for catalytic reduction of 4-FP catalyzed by Rh-MoS2/Nickel foam electrode are e-and active hydrogen(H*);After 5 cycles of experiments,the removal rate of 4-FP by Rh-MoS2/Nickel foam composite electrode decreases from 96%to 88%,showing good stability of the composite electrode.