FT-IR and FT-FIR studies of vanadium,molybdenum and tungsten oxides supported on different carriers |
| |
| Authors: | Françoise Maugé Jean-Paul Gallas Jean-Claude Lavalley Guido Busca Gianguido Ramis Vincenzo Lorenzelli |
| |
| Institution: | (1) Laboratoire de Spectrochimie, ISMRa, F-14032 Caen, France;(2) Istituto di Chimica, Fiera del Mare, I-16129 Genova, Italy;(3) UER des Sciences, Université, F-87060 Limoges, France |
| |
| Abstract: | In the far IR region at low molybdenum loadings, Mo-SiO2 catalysts present a pseudomolybdate or a polymolybdate species, while bulk-like MoO3 appears at loadings close to the geometrical monolayer coverage. W-SiO2 and V-SiO2 spectra show bands close to those observed on the corresponding bulk oxides.In the case of TiO2, Al2O3, ZrO2 supported catalysts, a band is observed near 1000 cm–1 which is assigned to the Mo=O stretching vibration of coordinatively unsaturated Mo
n+ ions showing a stronger interaction with the support than one observed on silica. |
| |
| Keywords: | FT-IR FT-FIR Mo V W phases support effect |
| 本文献已被 SpringerLink 等数据库收录！ |
|
