Highly Efficient Photocatalytic Reduction of CO<sub>2</sub> to CO by In Situ Formation of a Hybrid Catalytic System Based on Molecular Iron Quaterpyridine Covalently Linked to Carbon Nitride
Yue Wei, Lingjing Chen, Huan Chen, Lirong Cai, Guiping Tan, Yongfu Qiu, Quanjun Xiang, Gui Chen, Tai‐Chu Lau, Marc Robert
Abstract
Abstract Efficient and selective photocatalytic CO 2 reduction was obtained within a hybrid system that is formed in situ via a Schiff base condensation between a molecular iron quaterpyridine complex bearing an aldehyde function and carbon nitride. Irradiation (blue LED) of an CH 3 CN solution containing 1,3‐dimethyl‐2‐phenyl‐2,3‐dihydro‐1 H ‐benzo[d]imidazole (BIH), triethylamine (TEA), Feqpy‐BA (qpy‐BA=4‐([2,2′:6′,2′′:6′′,2′′′‐quaterpyridin]‐4‐yl)benzaldehyde) and C 3 N 4 resulted in CO evolution with a turnover number of 2554 and 95 % selectivity. This hybrid catalytic system unlocks covalent linkage of molecular catalysts with semiconductor photosensitizers via Schiff base reaction for high‐efficiency photocatalytic reduction of CO 2 , opening a pathway for diverse photocatalysis.