Details

Autor(en) / Beteiligte

• Chen, Qifeng
• Zheng, Peng
• Liu, Haodi
• Zhang, Yuanrong
• Li, Shuaitao
• Guo, Hongpian
• Fang, Yanfen
• Hu, Xun
• Duan, Ran

Titel

Dual active sites of single-atom copper and oxygen vacancies formed on ultrathin TiO(B) nanosheets boost the photocatalytic dehalogenative C-C coupling synthesis of bibenzyl

Ist Teil von

• Catalysis science & technology, 2024-03, Vol.14 (6), p.1568-1578

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The combination of photocatalytic dehalogenation of halogenated aromatics and C-C coupling synthesis of valuable organics is an interesting method for the elimination of pollutants and synthesis of valuable chemicals. Herein, we present a green method for the photocatalytic dehalogenation of benzyl bromide and selective coupling synthesis of bibenzyl achieved on the dual active sites of single-atom Cu and surface oxygen vacancies (V OS ) generated in situ on ultrathin 2D-TiO 2 (B) nanosheets. The experimental results show that single-atom Cu sites on ultrathin TiO 2 (B) nanosheets can improve charge transfer and separation efficiency and stabilize V OS formed in situ ; the presence of V OS not only improves light absorption capacity but also favors the adsorption of reactant benzyl bromide molecules. More importantly, the dual sites of single-atom Cu and adjacent V OS form a solid frustrated Lewis pair, favor the adsorption of benzyl bromide molecules, activate the C-Br bond, and boost the C-C coupling synthesis of bibenzyl. This work provides a novel insight into photocatalytic C-C coupling through the synergistic effect of single-atom Cu and V OS on ultrathin nanosheet photocatalysts. The combination of photocatalytic dehalogenation of halogenated aromatics and C-C coupling synthesis of valuable organics is an interesting method for the elimination of pollutants and synthesis of valuable chemicals.