Recent development of molybdenum sulfides as advanced electrocatalysts for hydrogen evolution reaction

Hydrogen is expected to play a major role in the development of sustainable energy and environment. Electrocatalytic hydrogen evolution reaction (HER) is known as an efficient method for large-scale hydrogen production, and in this electrochemical process, efficient and low-cost electrocatalysts are indispensable. Recent advances have revealed that nanostructured molybdenum sulfides (MoSx) would be promising alternatives to Pt for the electrochemical generation of hydrogen from water. In this review, we focus on the recent progress on MoSx-based materials as electrocatalysts toward the HER under acidic condition. Moreover, future research scope and important challenges emerging from MoSx nanostructures are discussed toward the development of more advanced and efficient electrocatalysts for HER.