6533b857fe1ef96bd12b4deb
RESEARCH PRODUCT
Reactivity between molybdenum and TiO2(110) surfaces: evidence of a sub-monolayer mode and a multilayer mode
Sylvie BourgeoisPeter KrügerZhongshan LiPreben J. MøllerA. BrevetBruno Domenichinisubject
ChemistryBand gapAnalytical chemistryGeneral Physics and Astronomychemistry.chemical_elementSurfaces and InterfacesGeneral ChemistryCondensed Matter PhysicsSurfaces Coatings and FilmsMetalTransition metalElectron diffractionMolybdenumvisual_artMonolayervisual_art.visual_art_mediumDeposition (law)Titaniumdescription
Small amounts of molybdenum (from 0.03 to 1.3 eqML) were deposited on non-stoichiometric TiO 2 (1 1 0) surface. The deposits were investigated by means of LEED and X-ray/UV photoemission using synchrotron radiation. For the smallest coverage (<0.2 eqML), deposition leads to oxidation of molybdenum into species close to Mo 4+ .In such a case, states appearing in TiO 2 band gap are mainly due to reduced titanium. For higher coverages, metallic behaviour of molybdenum is observed. This phenomenon was explained, thanks to first principle calculations, as a decrease of the Mo-O interactions for the benefit of the Mo-Mo interactions as the surface molybdenum atom density increases.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-05-01 | Applied Surface Science |