Mo-V-Nb-O-based catalysts for low-temperature selective oxidation of C-OH lignin model compounds

Mo-V-Nb tri-component oxide catalysts were prepared and firstly used for the selective oxidation of C-OH lignin compounds. The catalytic performance of the composite oxides was obviously enhanced due to the synergistic effects of Mo and V elements. MoVO phase with a variable Mo/V ratio provided suitable active sites for the oxidative dehydrogenation (ODH) of C-OH lignin model compound. The optimized Mo-V-Nb molar composition was confirmed as MoVNbO/TiO, which exhibited the prominent catalytic activity with the turnover frequency of 1.04×10 mmol·g(cat)s. Even at room temperature, the catalysts showed highly-efficient ODH reaction activities. The active phase for selective oxidation reaction and the inhibiting effect of α-MoO phase were also discussed in the study.