Structure and reaction studies on vanadium molybdenum mixed oxides

The correlation of the structure and the catalytic activity of vanadium molybdenum oxide catalysts were examined by X-ray diffraction and temperature programmed reduction measurements. The experiments revealed the presence of two metastable vanadium molybdenum mixed oxides, h-(V,Mo)O3 and (V,Mo)2O5, and an optimal vanadium molybdenum ratio of 3:7 for the yield of acrylic acid for acrolein.