Influence of the Support on Propene Oxidation over Gold Catalysts

Ewoud J.J. de Boed; Bryan J. Folmer; Min Tang; Baira Donoeva; Petra E. de Jongh

doi:10.3390/catal12030327

Influence of the Support on Propene Oxidation over Gold Catalysts

Ewoud J.J. de Boed, Bryan J. Folmer, Min Tang, Baira Donoeva, Petra E. de Jongh^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The epoxidation of propene without forming a substantial amount of byproducts is one of the holy grails of catalysis. Supported Cu, Ag and Au catalysts are studied for this reaction and the activity of the supported metals is generally well understood. On the contrary, limited information is available on the influence of the support on the epoxide selectivity. The reaction of propene with equal amounts of hydrogen and oxygen was tested over gold nanoparticles deposited onto CeO2, TiO2, WO3, γ‐Al2O3, SiO2, TiO2‐SiO2 and titanosilicate‐1. Several metal oxide supports caused further conversion of the synthesized propene oxide. Strongly acidic supports, such as WO3 and titanosilicate‐1, catalyzed the isomerization of propene oxide towards propanal and acetone. Key factors for achieving high PO selectivity are having inert or neutralized surface sites, a low specific surface and/or a low density of surface ‐OH groups. This work provides insights and practical guidelines to which metal oxide support properties lead to which products in the reaction of propene in the presence of oxygen and hydrogen over supported gold catalysts.

Original language	English
Article number	327
Journal	Catalysts
Volume	12
Issue number	3
DOIs	https://doi.org/10.3390/catal12030327
Publication status	Published - 11 Mar 2022

Bibliographical note

Funding Information:
Acknowledgments: Utrecht University is acknowledged for funding this project. Dennie Wezendonk is acknowledged for the TGA. The authors thank Claudia Keijzer for acquiring the SEM images and Luc Smulders for the NH3‐TPD experiments. The MCC physisorption team is acknowl‐ edged for the N2 physisorption.

Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Funding

Acknowledgments: Utrecht University is acknowledged for funding this project. Dennie Wezendonk is acknowledged for the TGA. The authors thank Claudia Keijzer for acquiring the SEM images and Luc Smulders for the NH3‐TPD experiments. The MCC physisorption team is acknowl‐ edged for the N2 physisorption.

Keywords

Epoxidation
Gold nanoparticles
Propene oxide
Support effects

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catalysts-12-00327-v2Final published version, 6.51 MBLicence: CC BY

Cite this

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abstract = "The epoxidation of propene without forming a substantial amount of byproducts is one of the holy grails of catalysis. Supported Cu, Ag and Au catalysts are studied for this reaction and the activity of the supported metals is generally well understood. On the contrary, limited information is available on the influence of the support on the epoxide selectivity. The reaction of propene with equal amounts of hydrogen and oxygen was tested over gold nanoparticles deposited onto CeO2, TiO2, WO3, γ‐Al2O3, SiO2, TiO2‐SiO2 and titanosilicate‐1. Several metal oxide supports caused further conversion of the synthesized propene oxide. Strongly acidic supports, such as WO3 and titanosilicate‐1, catalyzed the isomerization of propene oxide towards propanal and acetone. Key factors for achieving high PO selectivity are having inert or neutralized surface sites, a low specific surface and/or a low density of surface ‐OH groups. This work provides insights and practical guidelines to which metal oxide support properties lead to which products in the reaction of propene in the presence of oxygen and hydrogen over supported gold catalysts.",

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note = "Funding Information: Acknowledgments: Utrecht University is acknowledged for funding this project. Dennie Wezendonk is acknowledged for the TGA. The authors thank Claudia Keijzer for acquiring the SEM images and Luc Smulders for the NH3‐TPD experiments. The MCC physisorption team is acknowl‐ edged for the N2 physisorption. Publisher Copyright: {\textcopyright} 2022 by the authors. Licensee MDPI, Basel, Switzerland.",

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N2 - The epoxidation of propene without forming a substantial amount of byproducts is one of the holy grails of catalysis. Supported Cu, Ag and Au catalysts are studied for this reaction and the activity of the supported metals is generally well understood. On the contrary, limited information is available on the influence of the support on the epoxide selectivity. The reaction of propene with equal amounts of hydrogen and oxygen was tested over gold nanoparticles deposited onto CeO2, TiO2, WO3, γ‐Al2O3, SiO2, TiO2‐SiO2 and titanosilicate‐1. Several metal oxide supports caused further conversion of the synthesized propene oxide. Strongly acidic supports, such as WO3 and titanosilicate‐1, catalyzed the isomerization of propene oxide towards propanal and acetone. Key factors for achieving high PO selectivity are having inert or neutralized surface sites, a low specific surface and/or a low density of surface ‐OH groups. This work provides insights and practical guidelines to which metal oxide support properties lead to which products in the reaction of propene in the presence of oxygen and hydrogen over supported gold catalysts.

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Influence of the Support on Propene Oxidation over Gold Catalysts

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Keywords

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