A Review on Cooperative Effect of Intimate Interfacial TMDs/MXene (2D/2D) Heterostructure for Enhanced Electrocatalytic Hydrogen Evolution Reaction

Abstract

The future energy system strongly depends on hydrogen (H2) energy as a viable choice owing to its high energy density and environmentally benign nature. Electrocatalytic water splitting is a promising method to produce H2, hence research on developing economic and efficient electrocatalysts for hydrogen generation has increased. Over the past few decades, two-dimensional (2D) transition metal dichalcogenides (TMDs) have emerged as effective hydrogen evolution reaction (HER) catalysts due to their tunable electronic properties and large surface area. Recently, the 2D MXenes-based electrocatalysts have attracted much attention due to its distinct properties like high conductivity and stability. The construction of 2D/2D heterostructures using TMD and MXene can further boost hydrogen evolution reaction (HER) by increasing the electrochemically active surface area thereby inducing accelerated reaction kinetics along with stability. R1C2 The present review initially summarizes the important performance parameters for HER processes followed by an extensive review of the current approaches to enhance the catalytic efficiency of TMDs/MXene (2D/2D) heterostructure. In summary, this review provides insights into the synthesis of 2D/2D heterostructures, their electrochemical hydrogen evolution reaction (HER) activity, and the underlying mechanisms responsible for the enhanced catalytic performance. Finally, it highlights the interposed challenges and potential paths for developing TMDs/MXene electrocatalysts.