Ppm-level Cu dopant on ultrathin Pd nanosheets/TiO2 for highly enhanced photocatalytic alcoholysis of epoxides

Duan, Meilin ¹Hu, Canyu ¹Duan, Delong ¹Chen, Ruitian ¹Wang, Chengming ¹Wu, Di ¹Xia, Tong ¹Liu, Hengjie ¹Dai, Yitao ¹Long, Ran ¹Song, Li ¹Xiong, Yujie¹

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作者信息

1. Univ Sci & Technol China
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Abstract

Photocatalysis provides a new avenue for organic synthesis, to which catalyst design at atomic level holds the key. Herein, the first case of ppm-level (39 ppm) Cu dopant based photocatalyst has been successfully constructed as Cu1Pd200/TiO2, in which Cu element dopes ultrathin Pd nanosheets (thickness of 2 nm) with atomic dispersion using TiO2 as the semiconductor host. The alcoholysis of styrene oxide, as a model reaction, can produce valuable beta-alkoxy alcohols, conventionally requiring corrosive strong acids or harsh reaction conditions. The presence of ppm-level Cu atoms in Cu1Pd200/TiO2 can boost alcoholysis with a quite high reaction rate of 176 mmol.g(-1).h(-1) at room temperature under light illumination (100 mW.cm(2)), which is 6 times and 17 times higher than Pd/TiO2 and bare TiO2, respectively. Moreover, the Cu-doped photocatalyst presents excellent stability without deactivation after ten cycles. Based on X-ray photoelectron spectroscopy, infrared spectroscopy and control experiments, this unexpected photocatalytic behavior mainly origins from the electron transfer effect and unique chemisorption of epoxides owing to Cu dopant.

Key words

Copper/Palladium/Doping/Photocatalytic alcoholysis of styrene oxide/beta-alkoxy alcohols/CATALYTIC-ACTIVITY/ELECTRONIC-STRUCTURE/ACTIVE-SITES/STABILITY/PALLADIUM/NANOPARTICLES/CONVERSION/SURFACE/OXIDE

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量10

参考文献量52

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