Abstract
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.
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