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Keywords:

  • charge transfer;
  • gold;
  • nanoparticles;
  • photoelectron spectroscopy;
  • supported catalysts
Thumbnail image of graphical abstract

Reversible band bending induced by adsorption of molecular oxygen on TiO2(110) was revealed by studying the charge state of TiO2-supported Au nanoparticles under O2 pressure by X-ray photoelectron spectroscopy (see picture). This result is important for correct assignment of charge-transfer phenomena on catalysts in general, and with regard to the high catalytic activity of Au/TiO2 catalysts in numerous reactions, including CO oxidation.