Xenon-129 NMR Study of TiO2 (Anatase)-Supported V2O5 Catalysts
TiC>2 (anatase), V2O5, and V2(VTi02 (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 TiC>2 (anatase) and 93 ± 5 ppm for V2O5. The ViQsTYiOi 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.
Journal of Physical Chemistry
DOI of Published Version
Kritzenberger, Jurgen; Gaede, Holly C.; Shore, Jay S.; Pines, Alex; and Bell, Alexis T., "Xenon-129 NMR Study of TiO2 (Anatase)-Supported V2O5 Catalysts" (1994). Chemistry and Biochemistry Faculty Publications. 94.