Furfural Oxidation on Gold Supported on MnO2: Influence of the Support Structure on the Catalytic Performances

A series of catalysts consisting of gold nanoparticles supported on MnO2 presenting different morphologies were synthesized and tested in the base-free oxidation of furfural. Ultra-small Au particles (less than 3 nm) were deposited on low (commercial MnO2) and high (NF, nanoflowers and NW, nanowires...

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Bibliographic Details
Published in:Applied sciences 2018-08, Vol.8 (8), p.1246
Main Authors: Ferraz, Camila Palombo, Silva, Anderson Gabriel Marques Da, Rodrigues, Thenner Silva, Camargo, Pedro Henrique Cury, Paul, Sébastien, Wojcieszak, Robert
Format: Article
Language:English
Subjects:
Acids
Adsorption
Catalysis
Catalysts
Catalytic activity
Catalytic oxidation
Chemical Sciences
Furfural
Gold
gold nanoparticles
Manganese
Manganese dioxide
Manganese oxides
MnO2
nanoflowers
Nanoparticles
Nanowires
Oxidation
Photoelectrons
Selectivity
Supports
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Summary:A series of catalysts consisting of gold nanoparticles supported on MnO2 presenting different morphologies were synthesized and tested in the base-free oxidation of furfural. Ultra-small Au particles (less than 3 nm) were deposited on low (commercial MnO2) and high (NF, nanoflowers and NW, nanowires MnO2) surface area supports. High activity was observed for Au/MnO2-NF material with very high selectivity to furoic acid. The X-ray photoelectron spectroscopy (XPS) study confirmed the presence of a significant amount of highly active Auδ+ species on the surface of the Au/MnO2-NF catalyst. These species seem to be responsible for the high activity in oxidation of furfural under mild conditions (air as oxidant, 110 °C).
ISSN:2076-3417
2076-3417
DOI:10.3390/app8081246