J. Miciukiewicz et al., RAMAN-SPECTROSCOPY CHARACTERIZATION OF MOLYBDENA SUPPORTED ON TITANIA-ZIRCONIA MIXED-OXIDE, Applied catalysis. A, General, 122(2), 1995, pp. 151-159
TiO2-ZrO2 support containing 1:1 mole ratio was prepared by the coprec
ipitation method. TiO2 and ZrO2 were also prepared separately. After c
alcination at 823 K, the mixed oxide was found to be amorphous. These
solids were impregnated with molybdenum and examined by laser Raman sp
ectroscopy. Physical mixtures of MoO3 with the same supports were also
studied. It is shown that monolayer structures of the molybdenum oxid
e overlayers are formed in the presence and absence of water vapour.