Dynamic electronic structure of a Au/TiO2 catalyst under reaction conditions

Elizabeth A. Willneff, Simon Braun, Dirk Rosenthal, Hendrik Bluhm, Michael Hävecker, Evgenyi Kleimenov, Axel Knop-Gericke, Robert Schlögl, Sven L M Schroeder

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The electronic structure of a highly active Au/TiO2 powder catalyst was probed in situ by synchrotron X-ray photoelectron spectroscopy (XPS) in the 10-1 mbar range. The electronic structure of the Au component was found to respond sensitively to changes in temperature and indicated the absence of bulklike metallic Au under the conditions of highest catalytic activity. Concurrent modification of interfacial sites adjacent to Au on the TiO2 support was not evident from the Ti photoemission, but may have been below the detection limit of XPS. Copyright © 2006 American Chemical Society.
    Original languageEnglish
    Pages (from-to)12052-12053
    Number of pages1
    JournalJournal of the American Chemical Society
    Volume128
    Issue number37
    DOIs
    Publication statusPublished - 20 Sept 2006

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