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  Oxidation of Bioethanol using Zeolite-Encapsulated Gold Nanoparticles

Mielby, J., Abildstrøm, J. O., Wang, F., Kasama, T., Weidenthaler, C., & Kegnæs, S. (2014). Oxidation of Bioethanol using Zeolite-Encapsulated Gold Nanoparticles. Angewandte Chemie International Edition, 53(46), 12513-12516. doi:10.1002/anie.201406354.

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 Creators:
Mielby, Jerrik1, Author
Abildstrøm, Jacob Oskar1, Author
Wang, Feng2, Author              
Kasama, Takeshi3, Author
Weidenthaler, Claudia4, Author              
Kegnæs, Søren1, Author
Affiliations:
1Department of Chemistry, Technical University of Denmark, Kgs. Lyngby (Denmark), ou_persistent22              
2Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
3Center for Electron Nanoscopy, Technical University of Denmark, Kgs. Lyngby (Denmark), ou_persistent22              
4Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950291              

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Free keywords: acetaldehyde; bioethanol; catalytic oxidation; gold nanoparticles; zeolite
 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.

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Language(s): eng - English
 Dates: 2014-09-042014-11-10
 Publication Status: Published in print
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/anie.201406354
 Degree: -

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Title: Angewandte Chemie International Edition
  Abbreviation : Angew. Chem., Int. Ed.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 53 (46) Sequence Number: - Start / End Page: 12513 - 12516 Identifier: ISSN: 1433-7851
CoNE: https://pure.mpg.de/cone/journals/resource/1433-7851