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Charge State of Gold Nanoparticles Supported on Titania under Oxygen Pressure
Author(s) -
Porsgaard Soeren,
Jiang Peng,
Borondics Ferenc,
Wendt Stefan,
Liu Zhi,
Bluhm Hendrik,
Besenbacher Flemming,
Salmeron Miquel
Publication year - 2011
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201005377
Subject(s) - x ray photoelectron spectroscopy , catalysis , nanoparticle , charge (physics) , oxygen , adsorption , materials science , oxidation state , colloidal gold , high pressure , spectroscopy , chemical engineering , nanotechnology , photochemistry , chemical physics , chemistry , organic chemistry , engineering physics , physics , engineering , quantum mechanics
Reversible band bending induced by adsorption of molecular oxygen on TiO 2 (110) was revealed by studying the charge state of TiO 2 ‐supported Au nanoparticles under O 2 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/TiO 2 catalysts in numerous reactions, including CO oxidation.