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Structural and catalytic properties of Au/MgO-type catalysts prepared in aqueous or methanol phase: application in the CO oxidation reaction

Authors
  • Hernández, Willinton Y.1
  • Aliç, Funda1
  • Navarro-Jaen, Sara2
  • Centeno, Miguel A.2
  • Vermeir, Pieter3
  • Van Der Voort, Pascal1
  • Verberckmoes, An4
  • 1 Ghent University, Department of Inorganic and Physical Chemistry, Center for Ordered Materials, Organometallics & Catalysis (COMOC), Krijgslaan 281-S3, Ghent, 9000, Belgium , Ghent (Belgium)
  • 2 Centro Mixto Universidad de Sevilla-CSIC, Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla, Avda. Américo Vespucio 49, Seville, 41092, Spain , Seville (Spain)
  • 3 Ghent University, Laboratory for Chemical Analyses (LCA), Department of Applied Biosciences, Valentin Vaerwyckweg 1, Ghent, 9000, Belgium , Ghent (Belgium)
  • 4 Ghent University, Industrial Catalysis and Adsorption Technology (INCAT), Department of Chemical Engineering and Technical Chemistry, Valentin Vaerwyckweg 1, Ghent, 9000, Belgium , Ghent (Belgium)
Type
Published Article
Journal
Journal of Materials Science
Publisher
Springer-Verlag
Publication Date
Dec 28, 2016
Volume
52
Issue
8
Pages
4727–4741
Identifiers
DOI: 10.1007/s10853-016-0715-9
Source
Springer Nature
Keywords
License
Yellow

Abstract

Au/MgO and Au/Mg(OH)2-type catalysts for CO oxidation reaction were prepared by using two different synthesis methods in presence of either an aqueous or methanol phase. The influence of the porous and morphological properties of the starting magnesium oxide supports was analyzed and correlated with the catalytic performances of the final gold-supported catalysts. It was found that the deposition of gold in the presence of methanol as a solvent avoids the total rehydration of the MgO support and maintains the textural and morphological properties of the starting oxides. The support synthesized by a surfactant-assisted hydrothermal route, having a combined meso-macroporous structure (i.e., MgO-P) showed a positive influence on the CO oxidation reaction as it favored the dispersion of gold and the surface-to-gas phase interaction during the catalytic process.

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