dc.creator | Pieck, Carlos Luis | |
dc.creator | Del Val, S. | |
dc.creator | López Granados, M. | |
dc.creator | Bañares, M. A. | |
dc.creator | Fierro, J. L. G. | |
dc.date.accessioned | 2018-04-10T17:21:53Z | |
dc.date.accessioned | 2018-11-06T11:33:36Z | |
dc.date.available | 2018-04-10T17:21:53Z | |
dc.date.available | 2018-11-06T11:33:36Z | |
dc.date.created | 2018-04-10T17:21:53Z | |
dc.date.issued | 2002-04 | |
dc.identifier | Pieck, Carlos Luis; Del Val, S.; López Granados, M.; Bañares, M. A.; Fierro, J. L. G.; Bulk and Surface Structures of V2 O5 /ZrO2 Systems and Their Relevance for o -Xylene Oxidation; American Chemical Society; Langmuir; 18; 7; 4-2002; 2642-2648 | |
dc.identifier | 0743-7463 | |
dc.identifier | http://hdl.handle.net/11336/41530 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1854764 | |
dc.description.abstract | Zirconia-supported vanadium oxide systems, with V2O5 loadings ranging from V/Zr ) 0.033-0.270 atom ratios (0.2-2 monolayers), were prepared by impregnation of a porous ZrO2 substrate with ammonium metavanadate solutions. The surface structures of air-calcined samples were elucidated by Raman and X-ray photoelectron spectroscopic techniques and thermal desorption methods. Some insight into how the bulk structures of these materials developed upon thermal treatment was derived from the X-ray diffraction patterns and temperature-programmed reduction. At low V content, surface-dispersed vanadium oxide species were formed, which produced the transformation of the ZrO2 support from the tetragonal phase into the monoclinic one. At higher vanadium oxide contents, a solid-state reaction between V2O5 and ZrO2 occurred, with subsequent formation of the ZrV2O7 phase, this being the major V-containing phase. The reactivity of these surface structures was examined by looking at their performance for the oxidation of o-xylene to phthalic anhydride. Activity tests indicated that surface vanadium oxide species were more active for the oxidation of o-xylene but had a lower selectivity to phthalic anhydride. | |
dc.language | eng | |
dc.publisher | American Chemical Society | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/la0114631 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/abs/10.1021/la0114631 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.title | Bulk and Surface Structures of V2 O5 /ZrO2 Systems and Their Relevance for o -Xylene Oxidation | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |