Charge State of Gold Nanoparticles Supported on Titania under Oxygen Pressure


  • This work was supported by the Director, Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division, under the Department of Energy Contract No. DE-AC02-05CH11231.


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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.