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



ID: 429892.0, Fritz-Haber-Institut / Physical Chemistry
Interaction of NO with the O-rich RuO2(110) surface at 300 K
Authors:Jacobi, Karl; Wang, Yuemin
Language:English
Date of Publication (YYYY-MM-DD):2009-06-01
Title of Journal:Surface Science
Journal Abbrev.:Surf. Sci.
Volume:603
Issue / Number:10-12
Start Page:1600
End Page:1604
Title of Issue:Special Issue dedicated to Prof. Dr. Dr. h.c. mult. Gerhard Ertl, Nobel-Laureate in Chemistry 2007
Full name of Issue-Editor(s):Wandelt, Klaus; Campbell, Charles W.
Copyright:© 2009 Elsevier B.V. All rights reserved
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The interaction of NO with the O-rich RuO2(1 1 0) surface, exposing coordinatively unsaturated O-bridge, O-cus, and Ru-cus atoms, was studied at 300 K by thermal desorption spectroscopy (TDS) and high-resolution electron energy-loss spectroscopy (HREELS). The conclusions are validated by isotope substitution experiments with 18O. During exposure to NO an O···N–O surface group (NO2-cus) is formed with O-cus. Additionally, a smaller number of empty Ru-cus sites are filled by NO-cus. If one warms the sample to 400 K, NO2-cus does not desorb but decomposes into O and NO again, the latter being either released into gas phase or adsorbed as NO-cus. With O-bridge such a surface group is not stable at 300 K. Our experiments further prove that O-cus is more reactive than O-bridge.
Free Keywords:High-resolution electron energy-loss spectroscopy (HREELS); Thermal desorption spectroscopy; Chemisorption; Surface chemical reaction; Ruthenium oxide; Oxygen; Nitrogen oxides
External Publication Status:published
Document Type:Article
Communicated by:Martin Wolf
Affiliations:Fritz-Haber-Institut/Physical Chemistry
External Affiliations:Wang Y, Ruhr-Univ Bochum, Inst Phys Chem I, D-44780 Bochum, Germany
Identifiers:URL:http://www.sciencedirect.com/science?_ob=ArticleUR...
DOI:10.1016/j.susc.2008.09.047
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