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          Institute: Fritz-Haber-Institut     Collection: Physical Chemistry     Display Documents



ID: 289243.0, Fritz-Haber-Institut / Physical Chemistry
Characterization of various oxygen species on an oxide surface: RuO2(110)
Authors:Kim, Young Dok; Seitsonen, Ari P.; Wendt, Stefan; Wang, Jinhai; Fan, Chao Yang; Jacobi, Karl; Over, Herbert; Ertl, Gerhard
Language:English
Date of Publication (YYYY-MM-DD):2001-05-10
Title of Journal:Journal of Physical Chemistry B
Journal Abbrev.:J. Phys. Chem. B
Volume:105
Issue / Number:18
Start Page:3752
End Page:3758
Copyright:© 2001 American Chemical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The stoichiometric RuO2(110) surface is terminated by bridge-coordinated oxygen atoms (O-beta) and by coordinatively unsaturated Ru (Ru-cus) atoms. Exposure to gaseous O-2 leads to the formation of two additional surface species: a molecularly chemisorbed state (O-delta) bridging two neighboring Ru-cus atoms and weakly held O atoms (O-gamma) in terminal position above the Ru-cus atoms. Characterization of the energetics and kinetics as well as structural, vibrational, and electronic properties is achieved by combined application of experimental (low-energy electron diffraction, high-resolution electron loss spectroscopy, thermal desorption spectroscopy) and theoretical (density functional theory) methods. The interplay between the different oxygen species accounts for the high sticking coefficient for dissociative adsorption as well as for the continuous restoration of the surface structure in the course of catalytic oxidation reactions.
Free Keywords:Rich Ru(0001) surfaces; temperature oxidation; single-crystal; CO oxidation; ruthenium; phase; spectroscopy; reactivity; kinetics; coverage
External Publication Status:published
Document Type:Article
Communicated by:Gerhard Ertl
Affiliations:Fritz-Haber-Institut/Physical Chemistry
External Affiliations:Seitsonen AP, Univ La Sapienza, Dipto Fis, Unita Roma, INFM, I-00185 Rome, Italy
Identifiers:URL:http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/20...
DOI:10.1021/jp003213j
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