UV-Raman spectroscopy is demonstrated to be a valuable tool to study molybdenumoxide model catalysts at ambient pressure while visible light Raman yields no information. UV-Raman offers the possibility to characterize MoO x /Al 2 O 3 /Si and MoO x /SiO 2 / Si model systems with sub-monolayer loading of MoO x even though the surface area of a Si-wafer is much lower than that of a bulk support. Anchoring of MoO x onto Al 2 O 3 /Si and SiO 2 /Si results in similar molybdenum oxide compounds as for bulk catalysts.
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