Abstract
Laser Raman spectroscopy (LRS) was used to characterize the hydrated and dehydrated states of surface-supported Mo6+ on Davison 952 silica gel. Silica-supported Mo samples were prepared from MO2(η3-C3H5)4 and (η5-C5H5)2Mo2(CO)4. Metal loadings of 5.1–7.8 wt% Mo were studied. Crystallites of MoO3 were not observed at these high loadings. An upper limit for dispersing dehydrated, isolated Mo6+ was found at about 1 Mo atom/nm2, which corresponds to the isolated silanol density of silica.
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Roark, R.D., Kohler, S.D., Ekerdt, J.G. et al. Monolayer dispersion of molybdenum on silica. Catal Lett 16, 77–83 (1992). https://doi.org/10.1007/BF00764357
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DOI: https://doi.org/10.1007/BF00764357