Abstract
This work reports the applicability of reflux to the synthesis of Mo–V–Te–Nb–O metal oxide catalysts for the first time. The well-formed and defined orthorhombic M1 phase, i.e. Te 2 M 20O 57 ( M = Mo, V, Nb), was found to be better developed when a longer time was used to reflux the mixed metal clusters. The catalysts efficient for propane selective oxidation to acrylic acid, reaching ca. 60% of selectivity to acrylic acid at propane conversion of ca. 50% and at a reaction temperature of 693 K. In addition, a parallel between catalytic activity and catalyst reducibility is also concluded.
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