CO Oxidation Catalyzed by Supported Gold: Cooperation between Gold and Nanocrystalline Rare-Earth Supports Forms Reactive Surface Superoxide and Peroxide Species

CO Oxidation Catalyzed by Supported Gold: Cooperation between Gold and Nanocrystalline Rare-Earth Supports Forms Reactive Surface Superoxide and Peroxide Species

Beneficial defects: Reactive η1‐superoxide and peroxide species at one‐electron defect sites are formed at the metal–support interface in gold nanoclusters on nanocrystalline CeO2−x. These intermediates oxidize CO adsorbed on gold to form CO2. The reactive oxygen species are formed on nanocrystallin...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Angewandte Chemie (International ed.) 2005-07, Vol.44 (30), p.4778-4781
Hauptverfasser: Guzman, Javier, Carrettin, Silvio, Fierro-Gonzalez, Juan C., Hao, Yalin, Gates, Bruce C., Corma, Avelino
Format: Artikel
Sprache:eng
Schlagworte:
CARBON MONOXIDE
CATALYST SUPPORTS
CATALYTIC EFFECTS
cerium
CHEMICAL COMPOSITION
ENVIRONMENTAL SCIENCES
EXAFS spectroscopy
GOLD
heterogeneous catalysis
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
nanostructures
national synchrotron light source
OXIDATION
RARE EARTHS
SURFACE PROPERTIES
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Beneficial defects: Reactive η1‐superoxide and peroxide species at one‐electron defect sites are formed at the metal–support interface in gold nanoclusters on nanocrystalline CeO2−x. These intermediates oxidize CO adsorbed on gold to form CO2. The reactive oxygen species are formed on nanocrystalline CeO2−x (see picture) but not on conventional CeO2, and their formation is enhanced by the gold.
ISSN:1433-7851
0570-0833
1521-3773
DOI:10.1002/anie.200500659