Surface-Analytical Studies of Supported Vanadium Oxide Monolayer Catalysts
Supported vanadium oxide catalysts consisting of surface vanadia species on oxide supports were investigated by X-ray photoelectron spectroscopy XPS and ion scattering spectroscopy ISS to elucidate the effect of calcintion temepratures as well as exposures to X-rays and He ions on the surface prope...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2004 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/61927 |
| Acceso en línea: | http://hdl.handle.net/11336/61927 |
| Access Level: | acceso abierto |
| Palabra clave: | Vanadium Monolayer Surface Science Ion Scattering Spectroscopy https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| Sumario: | Supported vanadium oxide catalysts consisting of surface vanadia species on oxide supports were investigated by X-ray photoelectron spectroscopy XPS and ion scattering spectroscopy ISS to elucidate the effect of calcintion temepratures as well as exposures to X-rays and He ions on the surface properties. It was found that in supported V2O5/ZrO2, V2O5/CeO2 and V2O5/Nb2O5 catalysts possessing a vanadia monolayer coverage or above, the supports are densely covered by two-dimensional surface vanadia species, and the underlaying oxide support cations are not exposed. For a supported V2O5/Al2O3 catalyst containing however, a slight exposure of the oxide support cation Al was noted, which may originate from the much higher surface area of the support and resulting in a higher curvature of the surfaces covered by supported vanadia species. |
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