Water Adsorption at the Tetrahedral Titania Surface Layer of SrTiO3(110)-(4 × 1)
- Author(s)
- Zhiming Wang, Xianfeng Hao, Stefan Gerhold, Zbynek Novotny, Cesare Franchini, Eamon McDermott, Karina Schulte, Michael Schmid, Ulrike Diebold
- Abstract
The interaction of water with oxide surfaces is of great interest for both fundamental science and applications. We present a combined theoretical (density functional theory (DFT)) and experimental (scanning tunneling microscopy (STM) and photoemission spectroscopy (PES)) study of water interaction with the two-dimensional titania overlayer that terminates the SrTiO3(110)-(4 ? 1) surface and consists of TiO4 tetrahedra. STM and core-level and valence band PES show that H2O neither adsorbs nor dissociates on the stoichiometric surface at room temperature, whereas it does dissociate at oxygen vacancies. This is in agreement with DFT calculations, which show that the energy barriers for water dissociation on the stoichiometric and reduced surfaces are 1.7 and 0.9 eV, respectively. We propose that water weakly adsorbs on two-dimensional, tetrahedrally coordinated overlayers.
- Organisation(s)
- Computational Materials Physics
- External organisation(s)
- Technische Universität Wien, Lund University
- Journal
- The Journal of Physical Chemistry Part C (Nanomaterials and Interfaces)
- Volume
- 117
- Pages
- 26060-26069
- No. of pages
- 10
- ISSN
- 1932-7447
- DOI
- https://doi.org/10.1021/jp407889h
- Publication date
- 11-2013
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103009 Solid state physics, 103015 Condensed matter, 103025 Quantum mechanics, 103036 Theoretical physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/water-adsorption-at-the-tetrahedral-titania-surface-layer-of-srtio31104--1(cfe4944f-0768-4f41-9ae0-96fcdaa9398c).html