The solvent-free and aerobic oxidation of benzyl alcohol catalyzed by Pd supported on carbon nitride/CeO2 composites

The selective oxidation of benzyl alcohol using molecular oxygen is a sustainable strategy for the green synthesis of benzaldehyde, and an important research topic is developing heterogeneous catalysts that can afford high activity, especially under solvent-free and aerobic conditions. In this work,...

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Bibliographic Details
Published in:New journal of chemistry 2022-04, Vol.46 (15), p.7108-7117
Main Authors: Xin-Tong, Yi, Chun-Yuan, Li, Wang, Fei, Xu, Jie, Xue, Bing
Format: Article
Language:English
Subjects:
Alcohol
Benzaldehyde
Benzyl alcohol
Carbon
Carbon nitride
Catalysts
Catalytic activity
Cerium oxides
Composite materials
Dyes
Oxidation
Oxygen
Palladium
Solvents
Substrates
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Summary:The selective oxidation of benzyl alcohol using molecular oxygen is a sustainable strategy for the green synthesis of benzaldehyde, and an important research topic is developing heterogeneous catalysts that can afford high activity, especially under solvent-free and aerobic conditions. In this work, Pd catalysts supported on carbon nitride–ceria composites were prepared through a simple wet impregnation method, and they were then analyzed in detail using various characterization techniques. The combination of carbon nitride and ceria can not only steadily anchor Pd but it can also provide more active lattice oxygen. The catalytic performance of Pd/carbon nitride/CeO2 (Pd/CN/CeO2) was evaluated during the solvent-free and aerobic oxidation of benzyl alcohol. Under the same reaction conditions, Pd/CN/CeO2 demonstrated superior activity to both Pd/eg-C3N4 and Pd/CeO2, and the maximum yield of benzaldehyde achieved when using Pd/CN-1.0/CeO2 was 77%. Furthermore, the catalyst can be reused six times without any significant loss of catalytic activity, and it also exhibited good generality, allowing reactions with various substrates.
ISSN:1144-0546
1369-9261
DOI:10.1039/d2nj00638c