光催化
还原(数学)
复合数
催化作用
材料科学
占用率
化学
核化学
复合材料
数学
有机化学
几何学
生态学
生物
作者
Kainan Zhu,Qian Zhu,Mengpei Jiang,Yaowen Zhang,Zhiyu Shao,Zhibin Geng,Xiyang Wang,Hui Zeng,Xiaofeng Wu,Wei Zhang,Keke Huang,Shouhua Feng
标识
DOI:10.1002/anie.202207600
摘要
Abstract The electronic structure of composites plays a critical role in photocatalytic conversion, whereas it is challenging to modulate the orbital for an efficient catalyst. Herein, we regulated the t 2g orbital occupancy state of Ti to realize efficient CO 2 conversion by adjusting the amount of photo‐deposited Cu in the Cu/TiO 2 composite. For the optimal sample, considerable electrons transfer from the Cu d orbital to the Ti t 2g orbital, as proven by X‐ray absorption spectroscopy. The Raman spectra results also corroborate the electron enrichment on the Ti t 2g orbital. Further theoretical calculations suggested that the orbital energy of the Ti 3d orbital in TiO 2 is declined, contributing to accepting Cu 3d electrons. As a result, the Cu/TiO 2 composite exhibited an extremely high selectivity of 95.9 % for CO, and the productivity was 15.27 μmol g −1 h −1 , which is almost 6 times that of the original TiO 2 . Our work provides a strategy for designing efficient photocatalysis as a function of orbital regulation.
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