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

ID: 289095.0, Fritz-Haber-Institut / Physical Chemistry
Catalytic activity of RuO2(110) in the oxidation of CO
Authors:Wendt, Stefan; Seitsonen, Ari P.; Over, Herbert
Date of Publication (YYYY-MM-DD):2003-10-15
Title of Journal:Catalysis Today
Journal Abbrev.:Catal. Today
Issue / Number:2-4
Start Page:167
End Page:175
Copyright:© 2003 Elsevier B.V. All rights reserved.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The primary reason why the RuO2(1 1 0) surface is much more active in the oxidation of CO than the corresponding metal Ru(0 0 0 1) surface is correlated with the weaker oxygen bonding on RuO2(1 1 0) compared to chemisorbed oxygen on Ru(0 0 0 1). The RuO2(1 1 0) surface stabilizes at least two potentially active oxygen species, i.e., bridging O and on-top O atoms. Together with various adsorption sites for CO during the reaction, the CO oxidation reaction over RuO2(1 1 0) becomes quite complex. Using the techniques of temperature programmed reaction and desorption in combination with state-of-the-art density functional theory calculation we studied the CO oxidation reaction over RuO2(1 1 0) in the temperature range of 300–400 K. We show that the CO oxidation on RuO2(1 1 0) surface is not dominated by the recombination of CO with on-top O, although the binding energy of the on-top O is 1.4 eV lower than that of the bridging O atom.
Free Keywords:RuO2(1 1 0); Oxidation; CO; Rich Ru(0001) surfaces; Ruthenium dioxide; Room-temperature; Metal-surfaces; Chemistry; Oxide
External Publication Status:published
Document Type:Article
Communicated by:Gerhard Ertl
Affiliations:Fritz-Haber-Institut/Physical Chemistry
External Affiliations:Over H (reprint author), Wendt S, Univ Giessen, Dept Chem Phys, Heinrich Buff Ring, Giessen, D-35392 Germany;
Seitsonen AP, Univ Zurich, Phys Chem Inst, Zurich, CH-8057 Switzerland
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