@article {https://doi.org/10.1002/anie.202318562,
	title = {Efficient Photosynthesis of Hydrogen Peroxide by Cyano-Containing Covalent Organic Frameworks from Water, Air and Sunlight},
	journal = {Angewandte Chemie International Edition},
	volume = {63},
	number = {6},
	year = {2024},
	pages = {e202318562},
	abstract = {Abstract The insufficient exciton (e--h+ pair) separation/transfer and sluggish two-electron water oxidation are two main factors limiting the H2O2 photosynthetic efficiency of covalent organic frameworks (COFs) photocatalysts. Herein, we present an alternative strategy to simultaneously facilitate exciton separation/transfer and reduce the energy barrier of two-electron water oxidation in COFs via a dicyano functionalization. The in situ characterization and theoretical calculations reveal that the dicyano functionalization improves the amount of charge transfer channels between donor and acceptor units from two in COF-0CN without cyano functionalization to three in COF-1CN with mono-cyano functionalization and four in COF-2CN with dicyano functionalization, leading to the highest separation/transfer efficiency in COF-2CN. More importantly, the dicyano group activates the neighbouring C atom to produce the key *OH intermediate for effectively reducing the energy barrier of rate-determining two-electron water oxidation in H2O2 photosynthesis. The simultaneously enhanced exciton separation/transfer and two-electron water oxidation in COF-2CN result in high H2O2 yield (1601 μmol g-1 h-1) from water and oxygen without using sacrificial reagent under visible-light irradiation. COF-2CN can effectively yield H2O2 in water with wide pH range, in different real water samples, in scaled-up reactor under natural sunlight irradiation, and in continuous-flow reactor for consecutively producing H2O2 solution for water decontamination.},
	keywords = {Charge Transfer Channels, Covalent organic frameworks, Donor-Acceptor, H2O2 Photosynthesis, Practical Application},
	doi = {https://doi.org/10.1002/anie.202318562},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202318562},
	author = {Hou, Yanghui and Peng Zhou and Fuyang Liu and Lu, Yanyu and Tan, Hao and Li, Zhengmao and Meiping Tong and Ni, Jinren}
}
