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

作者：Syres Karen L; Thomas Andrew G^*; Graham Darren M; Spencer Ben F; Flavell Wendy R; Jackman Mark J; Dhanak Vinod R

来源：Surface Science, 2014, 626: 14-20.

DOI：10.1016/j.susc.2014.03.015

• Titanium dioxide
• Single crystal
• Adsorption
• Synchrotron radiation

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.

• 出版日期2014-8