Bonding of Methyl Phosphonate to TiO2(110) - Archive ouverte HAL
Article Dans Une Revue Journal of Physical Chemistry C Année : 2010

Bonding of Methyl Phosphonate to TiO2(110)

C. L. Pang
  • Fonction : Auteur
M. Watkins
  • Fonction : Auteur
Gregory Cabailh
S. Ferrero
L. T. Ngo
  • Fonction : Auteur
Q. Chen
D. S. Humphrey
  • Fonction : Auteur
A. L. Shluger
  • Fonction : Auteur

Résumé

We have used scanning tunneling microscopy (STM), noncontact atomic force microscopy (NC-AFM), low energy electron diffraction (LEED), and ab initio calculations to study adsorbates resulting from exposure of rutile TiO2(110)1 × 1 to methyl phosphonic acid (CH3P═O(OH)2). At low exposures, adsorbates appear on the 5-fold coordinated Ti (Ti5c) rows. As the coverage of adsorbates approaches 0.5 ML, STM images show an ordered 2 × 1 overlayer consistent with LEED. We propose that the phosphonic acid is deprotonated with the resulting phosphonate bridging across two adjacent Ti5c atoms in the [001] direction. This bridging conformation would lead to the observed 2 × 1 overlayer and is analogous to that found for a range of carboxylates adsorbed on TiO2(110).
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Dates et versions

hal-01323574 , version 1 (11-05-2020)

Identifiants

Citer

C. L. Pang, M. Watkins, Gregory Cabailh, S. Ferrero, L. T. Ngo, et al.. Bonding of Methyl Phosphonate to TiO2(110). Journal of Physical Chemistry C, 2010, 114 (40), pp.16983-16988. ⟨10.1021/jp1018923⟩. ⟨hal-01323574⟩
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