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



ID: 289224.0, Fritz-Haber-Institut / Physical Chemistry
The oxidation of CO on RuO2(110) at room temperature
Authors:Fan, Chao Yang; Wang, Jinhai; Jacobi, Karl; Ertl, Gerhard
Language:English
Date of Publication (YYYY-MM-DD):2001-06-08
Title of Journal:Journal of Chemical Physics
Journal Abbrev.:J. Chem. Phys.
Volume:114
Issue / Number:22
Start Page:10058
End Page:10062
Copyright:© 2001 American Institute of Physics
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:RuO2(110) surfaces were prepared by exposing Ru(0001) to 10(7) L of O-2 at 700 K. Postexposure of O-2 at 300 K resulted in an additional oxygen species (O-cus) adsorbed on coordinatively unsaturated Ru atoms (Ru-cus). The surface was then exposed to CO at 300 K and studied by thermal desorption spectroscopy (TDS) and high-resolution electron energy loss spectroscopy (HREELS). It is demonstrated that CO is oxidized at 300 K through reaction with both the O-cus as well as with surface O-atoms held in bridge positions (O-bridge). Although-at room temperature-CO adsorbs intermediately on the Ru-cus atoms, it is stable only at the Ru atoms underneath the O-bridge after the latter has been reacted off. At room temperature only surface oxygen takes part in the CO oxidation and the oxygen-depleted surface can be restored by O-2 exposure, so that under steady-state flow conditions an oxygen-deficient surface will exist whose stoichiometry will be determined by the ratio of partial pressures.
Free Keywords:Rich Ru(0001) surfaces; carbon-monoxide; oxygen; carbon compounds; adsorbed layers; oxidation; surface chemistry; thermally stimulated desorption; electron energy loss spectra; ruthenium compounds
External Publication Status:published
Document Type:Article
Communicated by:Gerhard Ertl
Affiliations:Fritz-Haber-Institut/Physical Chemistry
Identifiers:URL:http://ojps.aip.org/getabs/servlet/GetabsServlet?p...
DOI:10.1063/1.1350817
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