Advances and Promises of 2D MXenes as Cocatalysts for Artificial Photosynthesis

摘要

2D MXenes have received growing attention as highly active and earth-abundantcocatalysts for photocatalytic applications, due to their merits including rich surfacechemistry, excellent electrical conductivity, distinct carrier mobility, and goodhydrophilicity. In this review, the research progress on MXenes and MXene-basedcomposites in photocatalysis are systematically summarized and discussed. Basedon the theoretical and experimental studies, this review focuses mainly on thesynthetic methods of MXenes, the roles of MXenes in photocatalysis, the designstrategies forMXene-based composites and the state-of-the-art applications of theseMXene-based materials in photocatalytic reactions, including water splitting, CO_2reduction, and nitrogen fixation. In addition, this review outlines the surfacemodification and enhancement mechanism from a material design and synthesisperspective, and highlights the pivotal challenges and potential opportunities in thefield of Mxene-involved photocatalysis. Therefore, this review is expected to providea useful reference for the development of Mxene-related photocatalytic applications.