Improving alkaline hydrogen evoluation reaction efficiency through 1T/2H-MoS₂/Ni₃S₂ heterostructure design

Due to the fact that fossil fuels are limited and the world’s energy demand is rising, economic catalysts with exceptional stability and efficiency must be produced right now. MoS₂’s successfully increased catalytic activity by interfacial coupling and phase engineering. The 1T/2H-MoS₂/Ni₃S₂ composite was effectively created in this study by adding Ni₃S₂ material on top of 1T/2H-MoS₂ (Mo: S = 1:4). The effects of varying concentrations of Ni₃S₂ on hydrogen evaluation reaction characteristics are examined using the hydrothermal technique. The composite sample with an appropriate amount of Ni₃S₂ has the best hydrogen evolution performance when compared to samples with other amounts of Ni₃S₂. The sample’s overpotential at 1 M KOH is 124 mV at 10 mAcm⁻², and its Tafel slope is 138.0 mVdec⁻¹. In addition, the sample exhibits good air stability and hydrogen evolution stability. Also, to accelerate the kinetics of hydrogen evolution and encourage H₂O dissociation in an alkaline environment, Ni₃S₂ efficiently stimulates MoS₂’s inert base surface, creates a rich coupling boundary, and greatly enhances the performance of electrocatalytic hydrogen evolution.