2D/2D heterojunction interfaces of 1T-MoS2 and Ti3C2 MXene: designing high-performance catalyst for the hydrogen evolution reaction

This work reports a facile one-step hydrothermal synthesis of a 2D/2D heterostructure composed of metallic 1T-MoS2 nanosheets integrated with Ti3C2 MXene for efficient hydrogen evolution reaction (HER) electrocatalysis. The hybrid catalyst exhibits enhanced charge transfer, large electrochemically active surface area, and improved catalytic kinetics, achieving an overpotential of 248 mV at 10 mA cm−2 and a Tafel slope of 55 mV dec−1 in acidic electrolyte. The synergistic interaction between 1T-MoS2 and Ti3C2 suppresses MXene oxidation and enhances durability, providing a scalable strategy for high-performance non-precious HER catalysts.