Title
Solvent-free oxidation of 1-phenylethanol catalysed by gold nanoparticles supported on carbon powder materials
Author
Carabineiro, Sónia A.C. (Universidade do Porto; University of Lisbon)
Ribeiro, Ana P.C. (University of Lisbon)
Buijnsters, J.G. (TU Delft Micro and Nano Engineering) 
Avalos-Borja, Miguel (Instituto Potosino de Investigación Científica y Tecnológica)
Pombeiro, Armando J.L. (University of Lisbon)
Figueiredo, José L. (Universidade do Porto)
Martins, Luísa M.D.R.S. (University of Lisbon)
Date
2019
Abstract
Gold (1 wt.%) was loaded on several carbon materials, namely, polymer based carbon xerogel, activated carbon, microdiamonds, nanodiamonds, graphite and silicon carbide by double impregnation and sol immobilisation. The obtained catalysts were characterised by N2 adsorption at -196 ºC, high-resolution transmission electron microscopy, high-angle annular dark-field imaging (Z-contrast), temperature programmed desorption, atomic absorption spectroscopy and X-ray photoelectron spectroscopy. The obtained materials were tested on the microwave-assisted solvent-free oxidation of 1-phenylethanol by tert-butyl hydroperoxide (TBHP) to produce acetophenone. The results showed that the catalytic activity was influenced by several factors, namely, the nature of the support, reaction time and temperature, amount of catalyst, presence of additives, among others. The best values for acetophenone yield (99.9%) were obtained with Au deposited on microdiamonds by the colloidal method. Catalyst recyclability was tested up to six consecutive cycles at the optimized conditions for each catalyst, and it was found that Au on microdiamonds, prepared by the colloidal method, also maintained higher activity after several reaction cycles as compared to the other carbon supports.
Subject
1-Phenylethanol
Acetophenone
Carbon supports
Gold nanoparticles
Oxidation
To reference this document use:
http://resolver.tudelft.nl/uuid:fc652220-7a11-4b6f-add5-bec22663c9dc
DOI
https://doi.org/10.1016/j.cattod.2019.06.041
Embargo date
2019-12-13
ISSN
0920-5861
Source
Catalysis Today, 357 (2020), 22-31
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2019 Sónia A.C. Carabineiro, Ana P.C. Ribeiro, J.G. Buijnsters, Miguel Avalos-Borja, Armando J.L. Pombeiro, José L. Figueiredo, Luísa M.D.R.S. Martins