Abstract
A redox induced structural transformation for 2 monolayers of vanadia on R-TiO2(110) (rutile) was studied by in situ X-ray standing waves and ex situ X-ray photoelectron spectroscopy. The VOX film was grown by atomic layer deposition. Oxidation and reduction were carried out by annealing in O2 and H2, respectively. We found that an epitaxial rutile VO2 film was formed in the reduced phase with V 4+ cations in lateral alignment with Ti lattice positions. Oxidation was found to produce V 5+ cations uncorrelated to the substrate lattice in the oxidized phase. The redox induced structural and oxidation state transformation proved reversible and involved the entire film; not just the surface layer. The current study suggests that the structural order needs to be considered in order to study the activity of supported vanadium oxide catalysts.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
