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Immobilizing Highly Catalytically Molybdenum Oxide Nanoparticles on Graphene-Analogous BN: Stable Heterogeneous Catalysts with Enhanced Aerobic Oxidative Desulfurization Performance
- Yao, Xiaoyu, Wang, Chao, Liu, Hui, Li, Hongping, Wu, Peiwen, Fan, Lei, Li, Huaming, Zhu, Wenshuai
- Industrial & engineering chemistry process design and development 2018 v.58 no.2 pp. 863-871
- active sites, air, boron nitride, catalysts, desulfurization, molybdenum, nanoparticles, oxygen, process design, sulfur
- Supported molybdenum oxide nanoparticles (MoOₓNPs) have attracted intensive interest due to their unique catalytic properties. Herein, MoOₓNPs anchored on graphene-analogous boron nitride (g-BN) was prepared by a simple one-step method. The interaction between supports and NPs can be enhanced, and the size of MoOₓNPs can be controlled during the immobilization process. Molecular oxygen (O₂) in the air can be activated effectively with the as-prepared heterogeneous catalyst. It is noteworthy that experimental results indicate that the controlled MoOₓNP size and strong metal oxide support interaction are the two key factors which could help to exhibit high aerobic oxidative desulfurization activity. Moreover, sulfur removal of DBT can still reach 98.0% after recycling 11 times, which indicates that the supported catalyst has a good stability and recycling performance. Finally, the Mo(IV) and Mo(V) parts serve as the active sites to promote the production of superoxide–molybdenum species and the reaction pathway is further proposed.