Ob. Lapina et al., SURFACE COMPLEXES FORMED IN V2O5-TIO2-SIO2 CATALYSTS ACCORDING TO V-51 AND H-1 HIGH-RESOLUTION SOLID-STATE NMR DATA, Journal of molecular catalysis, 87(1), 1994, pp. 57-66
The V-51 and H-1 solid-state NMR data show the formation in V2O5-TiO2-
SiO2 catalysts of a number of surface tetrahedral and octahedral V com
plexes, with their types depending upon the sequence of titanium depos
ition. Among them triple complexes containing V, Ti and Si together ha
ve been found.