1H, 51V and 15N Nuclear Magnetic Resonance Studies of Structure and Properties of Vanadia Supported on TiOx/SiO2 Full article
Journal |
Solid State Nuclear Magnetic Resonance
ISSN: 0926-2040 , E-ISSN: 1527-3326 |
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Output data | Year: 1995, Volume: 4, Number: 6, Pages: 369-379 Pages count : 11 DOI: 10.1016/0926-2040(95)00020-Q | ||||
Tags | 15N nuclear magnetic resonance, 1H nuclear magnetic resonance, 51V nuclear magnetic resonance, Catalysts, Magic-angle spinning nuclear magnetic resonance, Silica, Surface oxides, Titania, Vanadia | ||||
Authors |
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Affiliations |
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Funding (4)
1 | German Research Foundation | SFB 338 |
2 | Russian Foundation for Basic Research | 93-03-4772 |
3 | Russian Foundation for Basic Research | 93-03-4774 |
4 | Verband der Chemischen Industrie |
Abstract:
1H magic-angle spinning nuclear magnetic resonance (MAS NMR) spectra of Full-size image (<1 K) catalysts suggest the interaction of surface TiOx. species with Si-OH groups of the silica. Simultaneously, Ti-OH groups from surface titania species appear. The distribution of TiOx species over SiO2 is non-uniform, since a considerable part of surface OH groups remains unreacted with supported titania. Supported vanadia species interact both with Si-OH and Ti-OH groups. 51V NMR spectra suggest the interaction of vanadia with supported titania species and show the non-uniform distribution of titania over the SiO2 surface. Deposition of titania as well as vanadia produces strong electron-accepting (Lewis) sites which interact with the terminal N atom of adsorbed N2O molecules, resulting in a downfield shift of the resonance in 15N NMR spectra. The acid strength of electron-accepting sites is similar in both cases. Only about 10% of the total amount of supported titania and vanadia create Lewis sites.
Cite:
Mastikhin V.M.
, Terskikh V.V.
, Lapina O.B.
, Filimonova S.V.
, Seidl M.
, Knözinger H.
1H, 51V and 15N Nuclear Magnetic Resonance Studies of Structure and Properties of Vanadia Supported on TiOx/SiO2
Solid State Nuclear Magnetic Resonance. 1995. V.4. N6. P.369-379. DOI: 10.1016/0926-2040(95)00020-Q WOS Scopus РИНЦ
1H, 51V and 15N Nuclear Magnetic Resonance Studies of Structure and Properties of Vanadia Supported on TiOx/SiO2
Solid State Nuclear Magnetic Resonance. 1995. V.4. N6. P.369-379. DOI: 10.1016/0926-2040(95)00020-Q WOS Scopus РИНЦ
Dates:
Submitted: | Jan 20, 1995 |
Accepted: | Feb 22, 1995 |
Published print: | Aug 1, 1995 |
Published online: | Jan 1, 2002 |
Identifiers:
Web of science | WOS:A1995RT32000005 |
Scopus | 2-s2.0-0029347434 |
Elibrary | 31156470 |
Chemical Abstracts | 1995:751980 |
Chemical Abstracts (print) | 123:209727 |
PMID | 8581435 |
OpenAlex | W273775013 |