Abstract
Iron molybdates (mixed oxides of iron and molybdenum) are used to effect the partial oxidation of methanol to formaldehyde. In the present work, Raman spectroscopy was used to characterize supported mixed iron/molybdenum oxide catalysts. These supported catalysts were prepared by impregnation of silica and alumina with solutions of ferric nitrate and ammonium molybdate. The Raman spectroscopic studies were employed to obtain information about the influence of variations in the preparation protocol on the properties of the final catalysts. The spectra were indicative of surface enrichment of one species [(MoO 3 or Fe 2(MoO 4) 3)] and also provided evidence for catalyst-support interactions.
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