A low-cost 2D WO3/Ni3S2 heterojunction for highly stable hydrogen evolution

Abstract

A transition metal-based nanohybrid has recently been demonstrated as an electrocatalyst which shows great potential in replacing commercial precious metal catalysts in hydrogen evolution reactions. Herein, a tungsten trioxide/nickel disulfide (WO₃/Ni₃S₂) heterojunction is developed. Compared to the corresponding single-component, the as-developed heterojunction electrode exhibits higher electrical/ionic conductivity and catalytic activity and stability due to the specific cooperativity. As expected, the WO₃/Ni₃S₂ electrode shows high hydrogen evolution performance both at low and high current densities. In addition, the as-developed electrode can work stably for a long time both at high and low current densities.