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

• Key Words:OXIDE CATALYSTS; FORMIC-ACID; DEHYDROGENATION; ETHANE; MOLYBDENUM; CLEAVAGE; ETHYLENE; PROPANE; PHASE; BI
• Abstract:Mo-V-Nb tri-component oxide catalysts were prepared and firstly used for the selective oxidation of C-alpha-OH lignin compounds. The catalytic performance of the composite oxides was obviously enhanced due to the synergistic effects of Mo and V elements. Mo5-xVxO14 phase with a variable Mo/V ratio provided suitable active sites for the oxidative dehydrogenation (ODH) of C-alpha-OH lignin model compound. The optimized Mo-V-Nb molar composition was confirmed as Mo0.61V0.31Nb0.08Ox/TiO2, which exhibited the prominent catalytic activity with the turnover frequency of 1.04x10(-3) mmol center dot g(cat)(-1 center dot)s(-1). Even at room temperature, the catalysts showed highly-efficient ODH reaction activities. The active phase for selective oxidation reaction and the inhibiting effect of alpha-MoO3 phase were also discussed in the study.
• Volume:14
• Issue:1
• Translation or Not:no