Two-dimension MoS₂/Ti₃C₂ MXene nanocomposite for an efficient hydrogen evolution reaction in alkaline media

This study reports an investigation on the fabrication of MoS₂/Ti₃C₂ MXene nanocomposites via a hydrothermal route. Based on the result, the composite exhibited 2D/2D flower-like MoS₂ layers stacked on the surface of Ti₃C₂ MXene nanosheets. The integration of MoS₂ and Ti₃C₂ MXene significantly enhances electrocatalytic activity of hydrogen evolution reaction in alkaline electrolytes. Electrochemical studies reveal that the MoS₂/Ti₃C₂ MXene nanocomposites exhibits a low overpotential and Tafel slope values of 421 mV and 217 mV dec⁻¹, respectively. Electrochemical impedance spectroscopy analysis also reveals a significantly reduced charge transfer resistance (R_ct) of 1.66 kΩ for nanocomposite. Electrochemical surface area (ECSA) of the nanocomposite, estimated from the electrochemical double-layer capacitance (C_dl), is 0.127 mF cm⁻². Notably, the MoS₂/Ti₃C₂ MXene nanocomposites exhibits excellent long-term stability. These results demonstrate the significant capacity of MoS₂/Ti₃C₂ MXene nanocomposite as a highly effective electrocatalyst for HER and its contribution to sustainable energy production.