Mesoporous Molybdenum-Tungsten Mixed Metal Oxide: A Solid Acid Catalyst for Green, Highly Efficient sp(3)-sp(2) C-C Coupling Reactions

摘要

A mesoporous molybdenum tungsten mixed metal oxide with high surface area (173 m(2)/g) was synthesized by using metal dissolution coupled with a surfactant assisted reverse micelle formation synthesis method. Comprehensive characterization of the mixed oxide was performed by using PXRD, Raman, BET, SEM, EDX, TEM, and XPS. Thus, the formation of alpha-Mo0.5W0.5O3 with a homogeneous distribution of Mo and W throughout the material was seen. Furthermore, multiple oxidation states of molybdenum (Mo6+ and Mo5+) and a single oxidation state of tungsten (W6+) were observed. The weak/moderate acidic sites present in the mixed metal oxide resulted in excellent catalytic properties toward the sp(3)-sp(2) carbon-carbon coupling reactions. The coupling of benzyl alcohol and toluene was completed within 15 min at 110 degrees C with 99% yield.