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Oxidation and Reduction of TiOx Thin Films on Pd(111) and Pd(100)
Norwegian Univ Sci & Technol, Dept Chem Engn, Trondheim.ORCID iD: 0000-0002-4078-8408
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
Norwegian Univ Sci & Technol, Dept Chem Engn, Trondheim.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
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2018 (English)In: Journal of Physical Chemistry B, ISSN 1520-6106, E-ISSN 1520-5207, Vol. 122, no 2, p. 688-694Article in journal (Refereed) Published
Abstract [en]

Thin films of TiOx on Pd(100) and Pd(111) have been investigated with respect to their properties after oxidation and reduction cycles. High-resolution photoemission spectroscopy (HRPES) and low energy electron diffraction (LEED) have been applied to characterize the thin film oxidation states and structure before and after oxidation and reduction under ultrahigh vacuum conditions. Fully oxidized TiO2 films were formed on both surfaces. These structures display Moiré patterns in LEED, in one dimension for Pd(100) and in two dimensions for Pd(111), and they have previously not been reported for TiO2/Pd. The oxidation process causes strong reduction in the interaction between the oxide thin film and the Pd substrate, most significantly for Pd(111). Reversible oxidation/reduction cycling of TiOx thin films on Pd(111) and Pd(100) was possible.

Place, publisher, year, edition, pages
2018. Vol. 122, no 2, p. 688-694
National Category
Inorganic Chemistry Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-343859DOI: 10.1021/acs.jpcb.7b06282ISI: 000423140600036PubMedID: 28825490OAI: oai:DiVA.org:uu-343859DiVA, id: diva2:1187177
Funder
Swedish Energy AgencySwedish Research CouncilCarl Tryggers foundation The Crafoord FoundationGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of TechnologyAvailable from: 2018-03-02 Created: 2018-03-02 Last updated: 2018-03-02Bibliographically approved

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Ragazzon, DavideSandell, Anders

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