Heterostructural engineering of Ni3S2/NiFe-LDH/NF electrocatalyst for enhanced oxygen evolution reaction

Preparing cheap, stable and effective electrocatalytic for oxygen evolution catalysts is urgent. A two-step hydrothermal method was applied to synthesis the heterostructural catalyst of Ni 3 S 2 /NiFe-LDH/NF in this study. The experiment demonstrates that Ni 3 S 2 could grow on the edges of NiFe-LDH. At 100 mA·cm − 2 , the Ni 3 S 2 /NiFe-LDH/NF shows 264 mV overpotential for oxygen evolution reaction (OER) which is lower than that of NiFe-LDH/NF and Ni 3 S 2 /NF. The electrochemical analysis shows that the heterostructure in Ni 3 S 2 /NiFe-LDH/NF could increase the effective charge transfer, active sites and adjusts the adsorption-desorption energy of OER performance. Also, the Ni 3 S 2 /NiFe-LDH/NF showed long-term stability, which is a candidate for water electrolysis applications in practice. Graphical