CO<sub>2</sub> Dominated Bifunctional Catalytic Sites for Efficient Industrial Exhaust Conversion
Man Dong, Jie Zhou, Jun Zhong, Haitao Li, Chunyi Sun, Yidong Han, Junning Kou, Zhenhui Kang, Xinlong Wang, Zhong‐Min Su
Abstract
Abstract Converting industrial exhaust into valuable chemicals is crucial for sustainable economic development. Direct CO 2 photoreduction from real flue gas is an ideal clean and promising way, until now, without success. Here, photoreduction of exhaust gas from the power plant by Ni bridged COF (Ni@TPHH‐COF) is shown. Under visible light, syngas is produced with CO output reaching 2.1 mol kg −1 h −1 . The ideal conversion of flue gas is up to 672 L kg −1 h −1 . Of note, the system exhibits appealing yield and selectivity under 0.5–40% CO 2 and AQY achieves 3.96% under 10% CO 2 , ranking among the highest value of reported photocatalysts. Mechanism studies suggest CO 2 plays a dual function as both a component of a catalytic site and a reactant, which can not only selectively enrich CO 2 in catalytic sites but improve reaction rate significantly. This CO 2 ‐dominated bifunctional site prolongs electrons lifetime, stabilizes intermediates, and reduces free energy of reduction under diluted CO 2 .