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ID: 351683.2, Fritz-Haber-Institut / Inorganic Chemistry
Catalytically active gold clusters and nanoparticles for CO oxidation
Authors:Pestryakov, Alexey N.; Bogdanchikova, Nina; Simakov, Andrey; Tuzovskaya, Inga; Jentoft, Friederike C.; Farias, Mario; Díaz, Antonio
Language:English
Research Context:Catalysis by gold
Date of Publication (YYYY-MM-DD):2007-04-07
Title of Journal:Surface Science
Journal Abbrev.:Surf. Sci.
Volume:601
Issue / Number:18
Start Page:3792
End Page:3795
Review Status:Peer-review
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:Electronic states of gold nanoparticles in mordenite and their transformations under redox treatments have been studied by the methods of FTIR spectroscopy of adsorbed CO and diffuse reflectance UV-visible spectroscopy. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite – Au+ and Au3+ ions, charged clusters Aunδ+, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the existence of two types of active sites of gold in CO oxidation – gold clusters < 2 nm (low-temperature activity) and gold nanoparticles (high-temperature activity
Free Keywords:gold catalysts, nanoparticles, zeolites, FTIR, UV-visible spectroscopy
External Publication Status:published
Document Type:Article
Communicated by:Robert Schlögl
Affiliations:Fritz-Haber-Institut/Inorganic Chemistry/Functional Characterization
External Affiliations:Tomsk Polytechnic University, Tomsk 634050, Lenin ave. 30, Russia
Centro de Ciencias de la Materia Condensada, Ensenada 22800, México
Identifiers:URL:http://dx.doi.org/10.1016/j.susc.2007.04.012
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