17O NMR Determination of Proton Sites in Solid Heteropoly Acid H3PW12O40. 31P, 29Si and 17O NMR, FT-IR and XRD Study of H3PW12O40 and H4SiW12O40 Supported on Carbon Full article
Journal |
Catalysis Letters
ISSN: 1011-372X , E-ISSN: 1572-879X |
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Output data | Year: 1994, Volume: 27, Number: 1-2, Pages: 187-197 Pages count : 11 DOI: 10.1007/BF00806992 | ||||
Tags | 31P29Si and17O MAS NMR, determination of proton sites, FT-IR, heteropoly acids supported on carbon, tungsten heteropoly acids, XRD | ||||
Authors |
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Affiliations |
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Funding (1)
1 | Netherlands Organisation for Scientific Research |
Abstract:
17O MAS NMR spectra for solid heteropoly acid (HPA) H3PW12O40 are reported. Comparison of solid-state and solution 17O resonances shows that in the solid dehydrated H3PW12O40 terminal W=O oxygen atoms are the predominant protonation sites. H3PW12O40 and H4SiW12O40 supported on chemically activated carbon have been studied by means of NMR, FT-IR and XRD. The carbon-supported HPA's retain their Keggin structure and form finely dispersed HPA species. No HPA crystal phase is developed even at an HPA loading as high as 45 wt%.31P, 29Si and 17O MAS NMR spectra for bulk and carbon-supported HPA's indicate interaction of the HPA Keggin units with the carbon surface, causing large line broadening in the NMR spectra.
Cite:
Kozhevnikov I.V.
, Sinnema A.
, Jansen R.J.
, van Bekkum H.
17O NMR Determination of Proton Sites in Solid Heteropoly Acid H3PW12O40. 31P, 29Si and 17O NMR, FT-IR and XRD Study of H3PW12O40 and H4SiW12O40 Supported on Carbon
Catalysis Letters. 1994. V.27. N1-2. P.187-197. DOI: 10.1007/BF00806992 WOS Scopus РИНЦ
17O NMR Determination of Proton Sites in Solid Heteropoly Acid H3PW12O40. 31P, 29Si and 17O NMR, FT-IR and XRD Study of H3PW12O40 and H4SiW12O40 Supported on Carbon
Catalysis Letters. 1994. V.27. N1-2. P.187-197. DOI: 10.1007/BF00806992 WOS Scopus РИНЦ
Dates:
Submitted: | Jan 31, 1994 |
Published print: | Mar 1, 1994 |
Accepted: | Apr 20, 1994 |
Identifiers:
Web of science | WOS:A1994NX52700021 |
Scopus | 2-s2.0-0000302954 |
Elibrary | 30840605 |
Chemical Abstracts | 1994:492840 |
Chemical Abstracts (print) | 121:92840 |
OpenAlex | W1995825299 |