Cinnamyl Alcohol Oxidation Using Supported Bimetallic Au–Pd Nanoparticles: An Optimization of Metal Ratio and Investigation of the Deactivation Mechanism Under Autoxidation Conditions

The aerobic oxidation of cinnamyl alcohol in toluene under autoxidation conditions has been studied using a range of 1 wt% Au–Pd/TiO 2 catalysts. The catalysts have been studied to determine the effect of preparation method (impregnation and sol immobilisation) and metal ratio on the conversion of c...

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Bibliographic Details
Published in:Topics in catalysis 2020-03, Vol.63 (1-2), p.99-112
Main Authors: Rucinska, Emilia, Pattisson, Samuel, Miedziak, Peter J., Brett, Gemma L., Morgan, David J., Sankar, Meenakshisundaram, Hutchings, Graham J.
Format: Article
Language:English
Subjects:
Alcohol
Aldehydes
Autoxidation
Bimetals
Catalysis
Catalysts
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Cinnamaldehyde
Deactivation
Gold
Immobilization
Impregnation
Industrial Chemistry/Chemical Engineering
Nanoparticles
Optimization
Original Paper
Oxidation
Palladium
Pharmacy
Physical Chemistry
Selectivity
Titanium dioxide
Toluene
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Summary:The aerobic oxidation of cinnamyl alcohol in toluene under autoxidation conditions has been studied using a range of 1 wt% Au–Pd/TiO 2 catalysts. The catalysts have been studied to determine the effect of preparation method (impregnation and sol immobilisation) and metal ratio on the conversion of cinnamyl alcohol and the selectivity to cinnamaldehyde. The catalysts prepared by sol-immobilisation demonstrate higher selectivity to the desired aldehyde than the analogous impregnation materials. The most active catalyst was found to be 0.75 wt% Au–0.25 wt% Pd/TiO 2 prepared by sol-immobilisation and this demonstrates the importance of metal ratio optimisation in this catalytic process. Furthermore, this metal ratio was found to be most stable under the reactions conditions with little change observed over multiple uses.
ISSN:1022-5528
1572-9028
DOI:10.1007/s11244-020-01231-0