Plasmonic oxidation of glycerol using AuPd/TiO2 catalysts

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

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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 languageEnglish
Pages (from-to)5686-5691
Number of pages6
JournalCatalysis Science and Technology
Issue number20
Early online date13 Sept 2019
Publication statusPublished - 21 Oct 2019

ASJC Scopus subject areas

  • Catalysis


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