Mn-Cd-S@amorphous-Ni3S2 hybrid catalyst with enhanced photocatalytic property for hydrogen production and electrocatalytic OER

Non-noble metal catalysts for photo/electrocatalytic water splitting are quite feasible for solving the problems of growing energy demand and environmental pollution. In this paper, noble-metal free [email protected]3S2 hybrid catalyst ([email protected]3S2) with bifunctionality of photocatalytic hydrogen evolution and electrocatalytic OER is designed and prepared by simple hydrothermal method. The characterization results show that Mn-Cd-S was composed of cubic manganese sulfide and manganese doped cadmium sulfide, and amorphous Ni3S2 coating on the surface of Mn-Cd-S. The resultant [email protected]3S2 catalyst presents good stability and a high photocatalytic H2 evolution rate of 12,069.27 μmolh−1 g−1. Besides, both Mn-Cd-S and [email protected]3S2 show good OER property with overpotential of 333 mV. [email protected]3S2 shows more favorable kinetics than that of Mn-Cd-S for OER. Moreover，the mechanism of the enhanced photo/electrocatalytic performance is investigated in detail. This work provides references for developing the catalysts with both photocatalytic and electrocatalytic properties.