Plasmonic oxidation of glycerol using AuPd/TiO2 catalysts

Laura Abis; Nikolaos Dimitritatos; Meenakshisundaram Sankar; Simon J. Freakley; Graham J. Hutchings

doi:10.1039/c9cy01409h

Plasmonic oxidation of glycerol using AuPd/TiO₂ catalysts

Laura Abis, Nikolaos Dimitritatos, Meenakshisundaram Sankar, Simon J. Freakley, Graham J. Hutchings

Department of Chemistry

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

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Abstract

AuPd nanoparticles supported on P25 TiO₂ (AuPd/TiO₂) were prepared by a facile sol-immobilisation method and investigated for surface plasmon-assisted glycerol oxidation under base-free conditions. The AuPd/TiO₂ samples were characterized by UV-vis spectroscopy and transmission electron microscopy. The sol-immobilisation method readily permitted the Au : Pd molar ratio to be changed over a wide range whilst keeping the mean particle size of the AuPd nanoparticles at 3 nm. Visible light irradiation during the reaction has a beneficial effect on the conversion of glycerol with the most marked effect being observed with gold-rich catalysts and the increase of conversion on light irradiation increases linearly with the gold content of the nanoparticles. The reaction selectivity is also affected by the plasmon-assisted oxidation and glycolic acid, not observed during the dark reactions, was observed for all illuminated reactions due to the enhanced activity of these catalysts.

Original language	English
Pages (from-to)	5686-5691
Number of pages	6
Journal	Catalysis Science and Technology
Volume	9
Issue number	20
Early online date	13 Sep 2019
DOIs	https://doi.org/10.1039/c9cy01409h
Publication status	Published - 21 Oct 2019

ASJC Scopus subject areas

Catalysis

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http://orca.cf.ac.uk/126025/

Cite this

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abstract = "AuPd nanoparticles supported on P25 TiO2 (AuPd/TiO2) were prepared by a facile sol-immobilisation method and investigated for surface plasmon-assisted glycerol oxidation under base-free conditions. The AuPd/TiO2 samples were characterized by UV-vis spectroscopy and transmission electron microscopy. The sol-immobilisation method readily permitted the Au : Pd molar ratio to be changed over a wide range whilst keeping the mean particle size of the AuPd nanoparticles at 3 nm. Visible light irradiation during the reaction has a beneficial effect on the conversion of glycerol with the most marked effect being observed with gold-rich catalysts and the increase of conversion on light irradiation increases linearly with the gold content of the nanoparticles. The reaction selectivity is also affected by the plasmon-assisted oxidation and glycolic acid, not observed during the dark reactions, was observed for all illuminated reactions due to the enhanced activity of these catalysts.",

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AU - Dimitritatos, Nikolaos

AU - Sankar, Meenakshisundaram

AU - Freakley, Simon J.

AU - Hutchings, Graham J.

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Plasmonic oxidation of glycerol using AuPd/TiO₂ catalysts

Abstract

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