Two-dimensional (2D) MXenes, which are transition metal 

nitrides/carbides, have exceptional electrical conductivity and 

capacitance and have found diverse applications since their discovery in 

2011. In particular, MXenes have been used as cocatalysts in 

photocatalysts through combination with other photocatalysts to 

enhance the separation of photogenerated charges, prevent the 

recombination of these charges, and transform solar energy into 

chemical energy or utilize it to degrade organic molecules. The 

composition and morphology of photocatalysts are influenced by their 

synthesis method and can significantly impact photocatalytic 

performance. The review provides a perspective on future studies that 

could further advance the utilization of MXenes in photocatalytic 

hydrogen evolution reactions.