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

SURFACE SCIENCE

卷:626

Article

Syres, Karen L.^1,2  Thomas, Andrew G.^1,2  Graham, Darren M.^1,2,3  Spencer, Ben F.^1,2,3  Flavell, Wendy R.^1,2  Jackman, Mark J.^1,2  Dhanak, Vinod R.⁴ 

[1] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Photon Sci Inst, Manchester M13 9PL, Lancs, England

[3] Sci Tech Daresbury, Daresbury Lab, Cockcroft Inst, Warrington WA4 4AD, Cheshire, England

[4] Sci Tech Daresbury, STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England

关键词: Titanium dioxide;    Single crystal;    Adsorption;    Synchrotron radiation;   

DOI  :  10.1016/j.susc.2014.03.015

来源: Elsevier

【 摘 要 】

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. (C) 2014 Elsevier B.V. All rights reserved.

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