Publication Type Journal Article
Title Supported Gold Nanoparticles as Reusable Catalysts for Oxidation Reactions of Industrial Significance
Authors L.M.D.R.S. Martins Sónia A.C. Carabineiro Jiawei Wang Bruno G. M. Rocha Francisco Jose Maldonado-Hodar Armando J.L. Pombeiro
Groups CCC
Journal CHEMCATCHEM
Year 2017
Month April
Volume 9
Number 7
Pages 1211-1221
Abstract The efficient single-pot oxidative functionalisation of alkanes and alcohols under mild conditions was catalysed by Au nanoparticles supported on Al2O3, Fe2O3, ZnO and TiO2. The obtained materials were tested for cyclohexane oxidation under mild conditions (60 degrees C, atmospheric pressure) using an environmentally friendly oxidant (H2O2). The materials were also tested in the oxidation of benzyl alcohol and methylbenzyl alcohol in the presence of tert-butylhydroperoxide as the oxidant under microwave irradiation. With regard to cyclohexane oxidation, all materials were highly selective towards the formation of cyclohexanol and cyclohexanone. No traces of byproducts were detected under the optimised conditions. Au on Fe2O3 led to the best results (13.5\% yield). This system showed an interesting almost exclusive formation of cyclohexanol at 4h reaction time. Catalyst recycling was tested in up to five cycles, and the catalyst maintained almost the original level of activity after three cycles with no significant leaching. With regard to oxidation of benzyl alcohol and methylbenzyl alcohol, all materials were highly selective towards the formation of benzaldehyde or acetophenone, respectively. No traces of byproducts were detected. Addition of Au increased alcohol conversion from 5 (TiO2) to 91\% (Au/TiO2). The recycling of Au/TiO2 was tested in up to 10 cycles, and the catalytic activity remained high in the first four cycles.
DOI http://dx.doi.org/10.1002/cctc.201601442
ISBN
Publisher WILEY-V C H VERLAG GMBH
Book Title
ISSN 1867-3880
EISSN 1867-3899
Conference Name
Bibtex ID ISI:000398859500011
Observations
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