Adsorption and stability of malonic acid on rutile TiO2 (110), studied by near edge X-ray absorption fine structure and photoelectron spectroscopy

Karen L. Syres, Andrew G. Thomas, Darren M. Graham, Ben F. Spencer, Wendy R. Flavell, Mark J. Jackman, Vinod R. Dhanak

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    Abstract

    The adsorption of malonic acid on rutile TiO2 (110) has been studied using photoelectron spectroscopy and C K-edge, near edge X-ray fine structure spectroscopy (NEXAFS). Analysis of the O 1s and Ti 2p spectra suggest that the molecule adsorbs dissociatively in a doubly-bidentate adsorption geometry as malonate. The data are unable to distinguish between a chelating bonding mode with the backbone of the molecule lying along the [001] azimuth or a bridging geometry along the direction. Work carried out on a wiggler beamline suggests that the molecule is unstable under irradiation by high-flux synchrotron radiation from this type of insertion device.
    Original languageEnglish
    Pages (from-to)14-20
    Number of pages6
    JournalSurface Science
    Volume626
    DOIs
    Publication statusPublished - Aug 2014

    Keywords

    • Adsorption
    • Single crystal
    • Synchrotron radiation
    • Titanium dioxide

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