The catalytic activity of iron-molybdenum catalyst in ammoxidation of methanol to HCN in boiling bed microreactor has been investigated with XRD

IR

Mossbauer Spectrum

ESR and XPS. The studies of XRD and IR indicated that iron and molybdenum ions were present as Fe2(MoO4)3

MoOs and α-Fe2O3 in the catalyst

and that the change of the relative content of Fe2(MoO4)3 and catalyticac activity showed corresponding correlation in a peak shape with Fe/Mo ratio. Mossbauer Spectrum

ESR and XPS analysis showed that iron and molybdenum would be present as Fe3+ and Mo6+ in Fe2(MoO4)3

Fe2O3·xMoO3 and α-Fe2O3·Fe2 (MoO4)3 was in coordination of an octahedron

while Fe2O3·xMoO3(x<3) showed im perfect coordination.The former could be a basic active component

the latter was very likely the surface active center. All the three components synergistically performed the function of selective oxidation.