Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 32, Issue 8, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202110136
Keywords
CO; (2) reduction; covalent organic frameworks; industrial exhaust photo-conversion; photocatalysis; synergic catalysis
Categories
Funding
- NSFC of China [21971032, 21801038, 21771035, 51725204, 21771132, 51972216, 52041202]
- Fundamental Research Funds for the Central Universities [2412019FZ007]
- National MCF Energy R&D Program of China [2018YFE0306105]
- National Key R&D Program of China [2020YFA0406104]
- Innovative Research Group Project of the National Natural Science Foundation of China [51821002]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- 111 Project
- Suzhou Key Laboratory of Functional Nano Soft Materials
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Photoreduction of exhaust gas from power plant by Ni@TPHH-COF showed appealing yield and selectivity, achieving AQY of 3.96% under 10% CO2 concentration, ranking among the highest reported photocatalysts. The mechanism suggests CO2 plays a dual function, selectively enriching catalytic sites and improving reaction rate.
Converting industrial exhaust into valuable chemicals is crucial for sustainable economic development. Direct CO2 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% CO2 and AQY achieves 3.96% under 10% CO2, ranking among the highest value of reported photocatalysts. Mechanism studies suggest CO2 plays a dual function as both a component of a catalytic site and a reactant, which can not only selectively enrich CO2 in catalytic sites but improve reaction rate significantly. This CO2-dominated bifunctional site prolongs electrons lifetime, stabilizes intermediates, and reduces free energy of reduction under diluted CO2.
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