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Fully Reversible Metal Deactivation Effects in Gold/Ceria–Zirconia Catalysts: Role of the Redox State of the Support
Author(s) -
Cíes José M.,
del Río Eloy,
LópezHaro Miguel,
Delgado Juan J.,
Blanco Ginesa,
Collins Sebastián,
Calvino José J.,
Bernal Serafín
Publication year - 2010
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.201005002
Subject(s) - x ray photoelectron spectroscopy , oxidizing agent , redox , catalysis , cubic zirconia , metal , oxygen storage , adsorption , fourier transform infrared spectroscopy , oxidation state , chemical state , materials science , inorganic chemistry , oxygen , chemical engineering , dispersion (optics) , chemistry , spectroscopy , nanomaterial based catalyst , metallurgy , organic chemistry , ceramic , physics , optics , quantum mechanics , engineering
Strong and reversible modification of the chemical properties of supported Au nanoparticles caused by alternating oxidizing (a and c) and reducing (b) pretreatment of Au/CeO 2 –ZrO 2 catalysts were revealed by a methodology that combines FTIR spectroscopy (see picture), studies on the volumetric adsorption of CO and ultimate oxygen storage capacity, determination of metal dispersion by electron microscopy, and X‐ray photoelectron spectroscopy.