Evidence of β-MoO3 formation during thermal treatment of silica-supported 12-molybdophosphoric acid catalysts
Abstract
Unsupported and silica-supported H3PMo12O40 catalysts show a wide temperature range for decomposition on thermal treatment allowing the formation of monoclinic β-MoO3(characterized by Raman spectroscopy and X-ray powder diffraction); this new supported phase leads specifically to dimethoxymethane in the methanol oxidation reaction.