CO Oxidation Over Monolayer Manganese Oxide Films on Pt(111)
2013 (English)In: Catalysis Letters, ISSN 1011-372X, E-ISSN 1572-879X, Vol. 143, no 11, 1108-1115 p.Article in journal (Refereed) Published
Ultrathin manganese oxide films grown on Pt(111) were examined in the low temperature CO oxidation reaction at near atmospheric pressures. Structural characterization was performed by X-ray photoelectron spectroscopy, Auger electron spectroscopy, high-resolution electron energy loss spectroscopy, and temperature programmed desorption. The results show that the reactivity of MnOx ultrathin films is governed by a weakly bonded oxygen species, which may even be formed at low oxygen pressures (similar to 10(-6) mbar). For stable catalytic performance at realistic conditions the films required highly oxidizing conditions (CO:O-2 < 1:10), otherwise the films dewetted, ultimately resulting in the catalyst deactivation. Comparison with other thin films on Pt(111) shows, that the desorption temperature of weakly bonded oxygen species can be used as a benchmark for its activity in this reaction.
Place, publisher, year, edition, pages
2013. Vol. 143, no 11, 1108-1115 p.
Ultrathin oxide films, Manganese oxide, CO oxidation
IdentifiersURN: urn:nbn:se:kth:diva-136573DOI: 10.1007/s10562-013-1117-0ISI: 000326893300003ScopusID: 2-s2.0-84890020130OAI: oai:DiVA.org:kth-136573DiVA: diva2:676464
FunderSwedish Research Council, 62360
QC 201312162013-12-062013-12-062016-08-31Bibliographically approved