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



  history
ID: 292026.0, Fritz-Haber-Institut / Physical Chemistry
The role of weakly bound on-top oxygen in the catalytic CO oxidation reaction over RuO2(110)
Authors:Wendt, Stefan; Knapp, Marcus; Over, Herbert
Language:English
Date of Publication (YYYY-MM-DD):2004-02-11
Title of Journal:Journal of the American Chemical Society
Journal Abbrev.:J. Am. Chem. Soc.
Volume:126
Issue / Number:5
Start Page:1537
End Page:1541
Copyright:© 2004 American Chemical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:RuO2-based catalysts are much more active in the oxidation of CO than related metallic Ru catalysts. This high catalytic activity (or low activation barrier) is attributed to the weak oxygen surface bonding of bridging O atoms on RuO2(110) in comparison with the strongly chemisorbed oxygen on Ru(0001). Since the RuO2(110) surface is able to stabilize an even more weakly bound on-top oxygen species, one would anticipate that the catalytic activity will increase further under oxidizing conditions. We will show that this view is far too simple to explain our temperature-programmed reaction experiments, employing isotope labeling of the potentially active surface oxygen species on RuO2(110). Rather, both surface O species on RuO2(110) reveal similar activities in oxidizing CO.
Free Keywords:Rich Ru(0001) Surfaces; Room-Temperature; Ruthenium; Identification
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, Knapp M, Univ Giessen, Dept Phys Chem, Heinrich Buff Ring 58, D-35392 Giessen, Germany
Identifiers:URL:http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/20... [Abstract]
DOI:10.1021/ja0364423
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