Characterization of V2O5-AlPO4 catalysts by 51V and 1H magic-angle spinning solid-state nuclear magnetic resonance spectroscopy
| Autor: | L. Jhansi Lakshmi, P. Kanta Rao, Olga B. Lapina, S.T. Srinivas, A.V. Nosov, V.M. Mastikhin |
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| Rok vydání: | 1995 |
| Předmět: |
Nuclear and High Energy Physics
Magnetic Resonance Spectroscopy Vanadium Compounds Radiation Chemistry Analytical chemistry Vanadium General Chemistry Fluorine-19 NMR Nuclear magnetic resonance crystallography Carbon-13 NMR Phosphates law.invention NMR spectra database Solid-state nuclear magnetic resonance law Magic angle spinning Aluminum Compounds Electron paramagnetic resonance Instrumentation Two-dimensional nuclear magnetic resonance spectroscopy Hydrogen |
| Zdroj: | Solid State Nuclear Magnetic Resonance. 4:59-64 |
| ISSN: | 0926-2040 |
| DOI: | 10.1016/0926-2040(94)00031-7 |
| Popis: | Amorphous aluminum orthophosphate is used as a carrier for preparing a series of V2O5-AlPO4 catalysts with varying vanadia content. The catalysts were characterized by solid-state 51V and 1H magic-angle spinning nuclear magnetic resonance (MAS NMR), electron spin resonance (ESR) and X-ray diffraction (XRD). The XRD patterns of the catalysts remained amorphous at all loadings studied. 51V Solid-state NMR spectra revealed the presence of V2O5 microcrystallites at higher vanadia loadings. The 1H MAS NMR spectra of the catalysts showed a maximum consumption of support hydroxyl groups at 6 wt.-% V2O5 indicating the completion of a monolayer at this composition. |
| Databáze: | OpenAIRE |
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