Revisited Catalytic Hydrogen Evolution Reaction Mechanism of MoS₂

MoS₂ has long been considered a promising catalyst for hydrogen production. At present, there are many strategies to further improve its catalytic performance, such as edge engineering, defect engineering, phase engineering, and so on. However, at present, there is still a great deal of controversy about the mechanism of MoS₂ catalytic hydrogen production. For example, it is generally believed that the base plane of MoS₂ is inert; however, it has been reported that the inert base plane can undergo a transient phase transition in the catalytic process to play the catalytic role, which is contrary to the common understanding that the catalytic activity only occurs at the edge. Therefore, it is necessary to further understand the mechanism of MoS₂ catalytic hydrogen production. In this article, we summarized the latest research progress on the catalytic hydrogen production of MoS₂, which is of great significance for revisiting the mechanism of MoS₂ catalytic hydrogen production.