Mielby, J;
Abildstrom, JO;
Wang, F;
Kasama, T;
Weidenthaler, C;
Kegnaes, S;
(2014)
Oxidation of Bioethanol using Zeolite-Encapsulated Gold Nanoparticles.
Angewandte Chemie International Edition
, 53
(46)
pp. 12513-12516.
10.1002/anie.201406354.
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Abstract
With the ongoing developments in biomass conversion, the oxidation of bioethanol to acetaldehyde may become a favorable and green alternative to the preparation from ethylene. Here, a simple and effective method to encapsulate gold nanoparticles in zeolite silicalite‐1 is reported and their high activity and selectivity for the catalytic gas‐phase oxidation of ethanol are demonstrated. The zeolites are modified by a recrystallization process, which creates intraparticle voids and mesopores that facilitate the formation of small and disperse nanoparticles upon simple impregnation. The individual zeolite crystals comprise a broad range of mesopores and contain up to several hundred gold nanoparticles with a diameter of 2–3 nm that are distributed inside the zeolites rather than on the outer surface. The encapsulated nanoparticles have good stability and result in 50 % conversion of ethanol with 98 % selectivity toward acetaldehyde at 200 °C, which (under the given reaction conditions) corresponds to 606 mol acetaldehyde/mol Au hour−1.
| Type: | Article |
|---|---|
| Title: | Oxidation of Bioethanol using Zeolite-Encapsulated Gold Nanoparticles |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/anie.201406354 |
| Publisher version: | https://doi.org/10.1002/anie.201406354 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Chemistry, Multidisciplinary, Chemistry, acetaldehyde, bioethanol, catalytic oxidation, gold nanoparticles, zeolite, MICRO-MESOPOROUS MATERIALS, SELECTIVE OXIDATION, PHASE OXIDATION, ETHYL-ACETATE, CO OXIDATION, ACETIC-ACID, ETHANOL, CATALYSTS, HYDROGEN, SIZE |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10064292 |
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