Xe-129 Nmr-Study of Tio2 (Anatase)-Supported V2o5 Catalysts

TitleXe-129 Nmr-Study of Tio2 (Anatase)-Supported V2o5 Catalysts
Publication TypeJournal Article
Year of Publication1994
AuthorsKritzenberger J., Gaede H.C, Shore J.S, Pines A, Bell A.T
JournalJournal of Physical Chemistry
Date PublishedOct 6
ISBN Number0022-3654
Accession NumberWOS:A1994PK74000037
Keywordsnay zeolite

TiO2 (anatase), V2O5, and V2O5/TiO2 (anatase) catalysts with 1.3%, 3.0%, and 9.8% weight loadings of V2O5 have been studied using temperature-dependent xenon-129 NMR spectroscopy. The intrinsic chemical shift values due to the interaction of xenon with the surface are 109 +/- 3 ppm for TiO2 (anatase) and 93 +/- 5 ppm for V2O5. The V2O5/TiO2 catalysts provide strong adsorption sites for xenon which cause an initial decrease of the chemical shift values at low xenon loadings. Additionally, the spectra of pure V2O5 reveal two distinct environments for the xenon atoms, consistent with the hysteresis of the isotherm and the existence of pores. Two-dimensional exchange spectroscopy was used to measure the rates and activation energy of xenon moving between these two environments.

URL<Go to ISI>://WOS:A1994PK74000037
Short TitleXe-129 Nmr-Study of Tio2 (Anatase)-Supported V2o5 Catalysts
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