Characterization of active sites on W2-xMOx(PO4)2 (0 ≤ x ≤ 1.25) in butan-2-ol conversion

The molybdenum-tungsten phosphate (W 2-x Mo x O 3 (PO 4 ) 2 ) was synthetised and characterised using several techniques. Its catalytic performances was studied in butan-2-ol conversion. The UV-visible investigations showed that the catalyst contains Mo(V) ions. This results was confirmed by the EPR spectra. Additional U.V. visible in-situ experimentss, in dynamic conditions revealed that butan-2-ol reduces Mo(VI) into Mo(V) ions. The active sites in the catalytic reaction appearto be built up arround the Mo(VI) ions.