2D Covalent Organic Frameworks Toward Efficient Photocatalytic Hydrogen Evolution

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.