选择性
光催化
人工光合作用
石墨氮化碳
光化学
催化作用
氮化碳
密度泛函理论
吸附
化学
二氧化碳
解吸
二氧化碳电化学还原
金属
材料科学
计算化学
物理化学
有机化学
一氧化碳
作者
Shan Hu,Panzhe Qiao,Xinli Yi,Yiming Lei,Huilin Hu,Jinhua Ye,Defa Wang
标识
DOI:10.1002/anie.202304585
摘要
Abstract Artificial photosynthesis is a promising strategy for converting carbon dioxide (CO 2 ) and water (H 2 O) into fuels and value‐added chemical products. However, photocatalysts usually suffered from low activity and product selectivity due to the sluggish dynamic transfer of photoexcited charge carriers. Herein, we describe anchoring of Ag single atoms on hollow porous polygonal C 3 N 4 nanotubes (PCN) to form the photocatalyst Ag 1 @PCN with Ag−N 3 coordination for CO 2 photoreduction using H 2 O as the reductant. The as‐synthesized Ag 1 @PCN exhibits a high CO production rate of 0.32 μmol h −1 (mass of catalyst: 2 mg), a high selectivity (>94 %), and an excellent stability in the long term. Experiments and density functional theory (DFT) reveal that the strong metal–support interactions (Ag−N 3 ) favor *CO 2 adsorption, *COOH generation and desorption, and accelerate dynamic transfer of photoexcited charge carriers between C 3 N 4 and Ag single atoms, thereby accounting for the enhanced CO 2 photoreduction activity with a high CO selectivity. This work provides a deep insight into the important role of strong metal–support interactions in enhancing the photoactivity and CO selectivity of CO 2 photoreduction.
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