Regulation of Coordinating Anions around Single Co(II) Sites in a Covalent Organic Framework for Boosting CO2 Photoreduction
Year: 2024
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide While photocatalytic CO 2 reduction has been intensively investigated, reports on the influence of anions coordinated to catalytic metal sites on CO 2 photoreduction remain limited. Herein, different coordinated anions (F –, Cl –, OAc –, and NO 3 – ) around single Co sites installed on bipyridine-based three-component covalent organic frameworks (COFs) were synthesized, affording TBD-COF-Co-X (X = F, Cl, OAc, and NO 3 ), for photocatalytic CO 2 reduction. Notably, the presence of these coordinated anions on the Co sites significantly influences the photocatalytic performance, where TBD-COF-Co-F exhibits superior activity to its counterparts. Combined experimental and theoretical results indicate that the enhanced activity in TBD-COF-Co-F is attributed to its efficient charge transfer, high CO 2 adsorption capacity, and low energy barrier for CO 2 activation. This study provides a new strategy for boosting COF photocatalysis through coordinated anion regulation around catalytic metal sites.
Source: Precision Chemistry
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: diamond
Funders: Boston College, National Natural Science Foundation of China, Chinese Academy of Sciences, China Postdoctoral Science Foundation, Zhengzhou University, Hefei Normal University, University of Science and Technology of China, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities
OpenAlex ID: W4403384426