Abstract: The fresh catalyst V2O5–WO3/TiO2 and catalyst used in SCR for 9000 h have been studied by the solid state 51V NMR spectroscopy in static and MAS conditions. According to 51V NMR in both samples the majority of vanadium sites are in a distorted octahedral environment similar to that in V2O5. There is a strong interaction between vanadium oxide and the support, but the concentration of vanadium atoms strongly bound to the surface is very small and can be detected only in MAS NMR experiments or after removing the excess of V2O5. There is no influence of WO3 additives on the structure of the particles of V2O5, whereas the influence on the structure of strongly bounded V cannot be excluded. Combination of static (wide line) and MAS NMR techniques permit the characterization of not only the structure of the vanadium species but also small changes in their local environment. Hence these experiments show that there are some distortions of the local environment of vanadium sites of the vanadium oxide particles compared with the polycrystalline V2O5; treatment by SCR increases these distortions.

Cite: Shubin A.A. , Lapina O.B. , Courcot D.
Characterization by Solid State 51V NMR Spectroscopy
Catalysis Today. 2000. V.56. N4. P.379-387. DOI: 10.1016/S0920-5861(99)00298-9 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Published online:	Feb 21, 2000
Published print:	Mar 13, 2000

Identifiers:

Web of science:	WOS:000085930700008
Scopus:	2-s2.0-0002221351
Elibrary:	31236041
Chemical Abstracts:	2000:126042
Chemical Abstracts (print):	132:211889
OpenAlex:	W2047351863

Citing:

DB	Citing
Web of science	23
Scopus	27
OpenAlex	27

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