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  Mesoporous Silica Supported Au and AuCu Nanoparticles for Surface Plasmon Driven Glycerol Oxidation

Schünemann, S., Dodekatos, G., & Tüysüz, H. (2015). Mesoporous Silica Supported Au and AuCu Nanoparticles for Surface Plasmon Driven Glycerol Oxidation. Chemistry of Materials, 27(22), 7743-7750. doi:10.1021/acs.chemmater.5b03520.

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 Creators:
Schünemann, Stephan1, Author              
Dodekatos, Georgios1, Author              
Tüysüz, Harun1, Author              
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1Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              

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 Abstract: Herein, we report for the first time the visible-light-assisted rate enhancement for glycerol oxidation using direct plasmonic photocatalysis. Au nanoparticles were loaded on various mesoporous SiO2 supports, and the catalytic performance was investigated with and without visible-light illumination. Monodispersed mesoporous silica spheres loaded with Au nanoparticles demonstrated a superior photoassisted catalytic rate enhancement compared to Au loaded ordered mesoporous silica (SBA-15, KIT-6, and MCM-41). The enhancement is attributed to the particle size of the Au nanoparticles and better light interaction resulting from the small SiO2 domains. Au loaded monodispersed mesoporous silica spheres exhibit a constant and remarkably small particle diameter of 2 nm at Au loadings of up to 15 wt % as a result of the support’s small domain size and efficient pore confinement. The performance of the Au catalyst could be further improved by preparing bimetallic AuCu nanoparticles. Synergistic effects between Au and Cu improved the glycerol conversion by a factor of 2.5 and the dihydroxyacetone selectivity from 80% to 90% compared to monometallic Au catalysts.

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Language(s): eng - English
 Dates: 2015-11-272015-11-24
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.chemmater.5b03520
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Title: Chemistry of Materials
  Other : Chem. Mater.
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 27 (22) Sequence Number: - Start / End Page: 7743 - 7750 Identifier: ISSN: 0897-4756
CoNE: https://pure.mpg.de/cone/journals/resource/954925561571