Two‐dimensional germanium for photocatalysis

Succeeding graphene a series of two‐dimensional materials(2D M)have been developed and applied in various fields.As an analog of silicene,2D germa-nium(2D Ge)has garnered vast attention owing to its novel structures and prolific properties,demonstrating substantial promise in semiconductor,catal-ysis,devices,and other burgeoning fields.Specifically,2D Ge is advantageous in providing a massive specific surface area,preferable transport properties,a tunable band gap structure,and confinement effects.Endowed with unique features,functionalized 2D Ge has become a competitive candidate for pho-tocatalysis.In this review,we catalog various synthetic methods of 2D Ge,discuss its fundamental properties,and summarize recent applications.We also present a few perspectives to provide fresh insights into designing and exploring 2D germanium in future photocatalysis.