Characterisation of strongly bonded V(V) species in VO /TiO2 catalyst by static and MAS solid-state NMR spectroscopy

Autor:	Alexander A. Shubin, V.M Bondareva, O. B. Lapina
Rok vydání:	1999
Předmět:	Extraction (chemistry) Oxide Analytical chemistry General Physics and Astronomy Vanadium chemistry.chemical_element Nuclear magnetic resonance spectroscopy Spectral line Catalysis chemistry.chemical_compound chemistry Quadrupole Tensor Physical and Theoretical Chemistry
Zdroj:	Chemical Physics Letters. 302:341-346
ISSN:	0009-2614
DOI:	10.1016/s0009-2614(99)00103-7
Popis:	51 V static and MAS NMR spectroscopy of central transition is shown to be an effective method for the characterisation of strongly bonded V(V) species in VO x /TiO 2 catalysts. Simultaneous determination of quadrupole and CSA tensors parameters (i.e., C Q , η Q , δ σ , η σ ) from both static and MAS NMR spectra of central transition permits the extraction of all NMR parameters with a reasonable accuracy. For the first time, a large 51 V quadrupolar constant (14–16 MHz) has been obtained for strongly bonded V(V) species in a supported vanadia catalyst, whereas CSA tensor principal components were found to be very close to those for bulk vanadium (V) oxide.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9480cf14ebf6bf1aee6bc15388ad2a6d https://doi.org/10.1016/s0009-2614(99)00103-7 Zobrazit plný text záznamu Full Text from ScienceDirect