4.2 Article

Multiple Promotional Effects of Vanadium Oxide on Boron Nitride for Oxidative Dehydrogenation of Propane

期刊

JACS AU
卷 2, 期 5, 页码 1096-1104

出版社

AMER CHEMICAL SOC
DOI: 10.1021/jacsau.1c00542

关键词

oxidative dehydrogenation; hexagonal boron nitride; vanadium oxide; oxyfunctionalization; nitric oxide

资金

  1. Center for Understanding and Control of Acid Gas-Induced Evolution of Materials for Energy - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DESC0012577]
  2. National Natural Science Foundation of China [91745202]
  3. Chinese Academy of Sciences and University of Science and Technology of China [KY2060000176]
  4. Department of Energy
  5. MRCAT member institutions [DE-AC0206CH11357]

向作者/读者索取更多资源

We report a catalyst with vanadium oxide dispersed onto hexagonal boron nitride (h-BN), which catalyzes the oxidative dehydrogenation of propane (ODHP) via the Eley-Rideal mechanism and the Mars-van Krevelen mechanism. The results show that loading 0.5wt% V significantly improves the yield of light alkene. Adding an appropriate concentration of nitric oxide further enhances the catalytic performance. This provides a potential strategy for developing efficient h-BN-based catalysts for ODHP by coupling gas-phase and surface reactions.
Featuring high olefin selectivity, hexagonal boron nitride (h-BN) has emerged recently as an attractive catalyst for oxidative dehydrogenation of propane (ODHP). Herein, we report that dispersion of vanadium oxide onto BN facilitates the oxyfunctionalization of BN to generate more BOx active sites to catalyze ODHP via the Eley-Rideal mechanism and concurrently produce nitric oxide to initiate additional gas-phase radical chemistry and to introduce redox VOx sites to catalyze ODHP via the Mars-van Krevelen mechanism, all of which promote the catalytic performance of BN for ODHP. As a result, loading 0.5 wt % V onto BN has doubled the yield of light alkene (C-2-C-3) at 540-580 0 C, and adding an appropriate concentration of NO in the reactants further enhances the catalytic performance. These results provide a potential strategy for developing efficient h-BN-based catalysts through coupling gas-phase and surface reactions for the ODHP process.

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