Sodium-Modified V2O5-TiO2 Catalysts: 23Na and 51V Solid-State NMR Study
PCCP: Physical Chemistry Chemical Physics
, E-ISSN: 1463-9084
Terskikh Victor V.
Lapina Olga B.
Bondareva Valentina M.
Boreskov Institute of Catalysis SB RAS
Sodium-doped binary vanadia–titania catalysts were studied using modern high-resolution solid-state NMR techniques, including fast magic angle spinning (MAS) and two-dimensional triple-quantum MAS NMR. The latter technique was engaged in the interpretation of second-order quadrupolar broadened one-dimensional 23Na MAS NMR spectra. NMR and X-ray powder diffraction data brought together allow identification of sodium- and vanadium-containing species formed in the course of the preparation of the catalysts. The effect of the sodium concentration on the nature of the resulting species is discussed.