2D Covalent Organic Frameworks Toward Efficient Photocatalytic Hydrogen Evolution

Abstract Efficiently producing clean energy is of great importance for sustainable development of the environment. Solar‐driven water splitting for H 2 evolution has an important role among the renewable energy technologies. Developing high‐performance and cost‐effective photocatalysts is still a critical task before practical application. 2D Covalent organic frameworks (COFs) as photocatalysts have recently attracted widespread interest thanks to their tunable optical bandgaps, tailor‐made functionality, excellent crystallinity, high specific surface area, and good photo‐ and chemical stability. This Review focuses on the representative progress and remaining challenges in 2D COF‐based photocatalysts for hydrogen evolution.