MoS2 A Ni3S2 A NF Bifunctional Electrocatalysts for Efficient Overall Water Splitting

By adjusting the hydrothermal reaction time,the nickel foam(NF)self-supporting MoS2 / Ni3S2 / NF heterostructure array was synthesized by one-step hydrothermal method. The phase analysis and morphology characterization of MoS2 / Ni3S2 / NF electrocatalysts were analyzed by XRD,XPS,SEM and EDS. The electrocatalytic hydrogen evolution reaction(HER)and oxygen evolution reaction (OER)properties in 1. 0 mol·LKOH alkaline electrolyte were tested. The results show that when the current density of HER and OER increases to 100 mA·cm-2,the optimal MoS2 / Ni3 S2 / NF-4 composite electrode obtained after hydrothermal reaction for 4 h has low overpotential of 196 mV and 310 mV respectively, and shows low Tafel slope of 30 mV·dec-1 and 89. 6 mV·dec-1,respectively. In addition,MoS2 / Ni3 S2 / NF-4 heterostructure is used as a bifunctional electrocatalyst. When the current density reaches 10 mA·cm-2,the electrolytic cell needs a low voltage of 1. 50 V,and has good stability under alkaline conditions. There is no significant change in performance within 100 h. It can be seen that MoS2 / Ni3 S2 / NF stalactite rod array can become a bifunctional electrocatalyst for high-efficiency overall water splitting. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.