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

Xiao Jiang; Xuanyu Zhang; Stephen C Purdy; Yang He; Zhennan Huang; Rui You; Zeyue Wei; Harry M Meyer 3rd; Jiuzhong Yang; Yang Pan; Peiwen Wu; Wenshuai Zhu; Miaofang Chi; Katharine Page; Weixin Huang; Zili Wu

doi:10.1021/jacsau.1c00542

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

JACS Au. 2022 Apr 1;2(5):1096-1104. doi: 10.1021/jacsau.1c00542. eCollection 2022 May 23.

Authors

Xiao Jiang¹, Xuanyu Zhang^{1

2}, Stephen C Purdy³, Yang He¹, Zhennan Huang⁴, Rui You², Zeyue Wei², Harry M Meyer 3rd¹, Jiuzhong Yang⁵, Yang Pan⁵, Peiwen Wu⁶, Wenshuai Zhu⁶, Miaofang Chi⁴, Katharine Page^{3

7}, Weixin Huang², Zili Wu^{1

4}

Affiliations

¹ Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
² Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China.
³ Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
⁴ Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
⁵ National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, P.R. China.
⁶ School of Chemistry and Chemical Engineering, Jiang Su University, Zhenjiang 212013, P. R. China.
⁷ Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.

Abstract

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 BO _x 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 VO _x 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 (C₂-C₃) at 540-580 °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.