Add time:07/17/2019 Source:sciencedirect.com
Silica-supported 12-molybdosilicic acid catalysts prepared by impregnation are studied by IR and Raman spectrometries as a function of the Mo content (Mo wt% varying from 24.6 to 1.2). A dispersion effect is evidenced, especially by Raman spectrometry. The 12-molybdosilicate anion in interaction with the silica support is preserved down to 2% Mo. The results are discussed in relation with 29Si magic-angle-spinning NMR and reactivity studies in the methanol oxidation.
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