Experimental evidence for electron localization on Au upon photo-activation of Au/anatase catalysts

J.T. Carneiro, Joana T. Carneiro, Tom J. Savenije, Guido Mul

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Abstract

Time resolved microwave conductivity (TRMC) measurements show that the presence of Au on anatase Hombikat UV100 significantly reduces the lifetime of mobile electrons formed by photo-excitation of this photocatalyst at 300 nm, providing evidence for the widely acclaimed electron localization effect of Au in promoting TiO2 photocatalysts. Electron localization efficiency of Au was even higher for Au-promoted Hombikat calcined at 400 °C, explained by enlargement of the anatase particle size and the associated, relatively larger fraction of anatase particles in direct contact with Au
Original languageUndefined
Pages (from-to)2708-2714
JournalPhysical chemistry chemical physics
Volume11
Issue number15
DOIs
Publication statusPublished - 2009

Keywords

  • METIS-306523
  • IR-95340

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