1. College of Materials Science and Engineering, Shandong University of Science and Technology, 579 Qianwangang Road, Qingdao 266590, China 2. College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao 266000, China 3. Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, 100 Daxue East Road, Nanning 530004, China
Mo–V–Nb tri-component oxide catalysts were prepared and firstly used for the selective oxidation of Cα−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 Cα−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 1.04×10−3 mmol· g(cat)−1·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 α-MoO3 phase were also discussed in the study.
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