Oxidation of Bioethanol using Zeolite-Encapsulated Gold Nanoparticles

Jerrik Jørgen Mielby, Jacob Oskar Abildstrøm, Feng Wang, Takeshi Kasama, Claudia Weidenthaler, Søren Kegnæs

Research output: Contribution to journalJournal articleResearchpeer-review

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 2-3nm 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 degrees C, which (under the given reaction conditions) corresponds to 606molacetaldehyde/molAuhour-1.
Original languageEnglish
JournalAngewandte chemie-international edition
Volume53
Issue number46
Pages (from-to)12513-12516
Number of pages4
ISSN1433-7851
DOIs
Publication statusPublished - 2014

Cite this

Mielby, Jerrik Jørgen ; Abildstrøm, Jacob Oskar ; Wang, Feng ; Kasama, Takeshi ; Weidenthaler, Claudia ; Kegnæs, Søren. / Oxidation of Bioethanol using Zeolite-Encapsulated Gold Nanoparticles. In: Angewandte chemie-international edition. 2014 ; Vol. 53, No. 46. pp. 12513-12516.
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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 2-3nm 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 degrees C, which (under the given reaction conditions) corresponds to 606molacetaldehyde/molAuhour-1.",
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Oxidation of Bioethanol using Zeolite-Encapsulated Gold Nanoparticles. / Mielby, Jerrik Jørgen; Abildstrøm, Jacob Oskar; Wang, Feng; Kasama, Takeshi; Weidenthaler, Claudia; Kegnæs, Søren.

In: Angewandte chemie-international edition, Vol. 53, No. 46, 2014, p. 12513-12516.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Oxidation of Bioethanol using Zeolite-Encapsulated Gold Nanoparticles

AU - Mielby, Jerrik Jørgen

AU - Abildstrøm, Jacob Oskar

AU - Wang, Feng

AU - Kasama, Takeshi

AU - Weidenthaler, Claudia

AU - Kegnæs, Søren

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AB - 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 2-3nm 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 degrees C, which (under the given reaction conditions) corresponds to 606molacetaldehyde/molAuhour-1.

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