Volume 9, Issue 4 2401510
Research Article

Ultrahigh-Selectivity Photocatalytic Upgrading of Bio-Aldehydes/Diols to Monoalcohols Via In Situ Circumventing Coupling Co-Products Over Janus Single-Atom Pd/TiO2

Ye Meng

Ye Meng

State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025 China

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Jie Li

Jie Li

State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025 China

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Huan Liu

Huan Liu

State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025 China

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Tengyu Liu

Tengyu Liu

State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025 China

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Jinguang Hu

Corresponding Author

Jinguang Hu

Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4 Canada

E-mail: [email protected]; [email protected]

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Hu Li

Corresponding Author

Hu Li

State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025 China

E-mail: [email protected]; [email protected]

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First published: 15 January 2025
Citations: 1

Abstract

Photocatalytic transfer hydrogenation of biomass-derived aldehydes to alcohols often results in unwanted coupling co-products. Herein, an ultraselective hydrogen transfer system enabled by in situ oxidative C─C bond cleavage over a Janus single-atom palladium on titanium dioxide (0.5Pd/TiO2) photocatalyst is presented. The TiO2 carrier promotes hydrogen-donor activation, while Pd single atoms function as both electron and hydrogen transfer centers, enabling photocatalytic conversion of bio-based furfural to furfuryl alcohol in >99% yield using ethanol as solvent/H-donor at 25 °C. The control/in situ experiments and calculations reveal that ethanol on 0.5Pd/TiO2 preferentially activates a co-formed coupling by-product to undergo C─C bond cleavage followed by proton-coupled electron transfer, exclusively producing furfuryl alcohol. 0.5Pd/TiO2 with good reusability is applicable to hydrogenative upgrading of various aldehydes/diols into corresponding monoalcohols with 81‒99% yields. This in situ Janus photocatalytic conversion strategy offers a new approach to eliminate side reactions in reductive upgrading of unsaturated organics/biomass with high selectivity.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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