Boron and Nitride Dual vacancies on Metal‐Free Oxygen Doping Boron Nitride as Initiating Sites for Deep Aerobic Oxidative Desulfurization

Abstract

Boron nitride (BN) is a two‐dimensional ceramic material that has been widely applied in various catalysis reactions. However, endowing the BN material with adequate reactive centers remains to be a considerable challenge. Herein, we propose a tunable boron and nitride dual vacancies strategy to generate highly active oxygen‐doping BN (BNO) material via heat treatment in vacuum. Experimental results indicate that the vacuum treatment fabricates boron and nitride dual vacancies on the BNO. The as‐prepared vacuum treated BNO (V‐BNO) was applied as the initiator to accelerate the aerobic oxidative desulfurization (ODS) of fuel. The boosted aerobic ODS system achieves 100 % sulfur removal in 6 h, and it can be recycled 6 times without any significant performance loss. Meanwhile, the density functional theory (DFT) reveals the reaction pathway on the V‐BNO, ensuring the contribution of boron and nitride dual vacancies to the initiation of the reaction. This work highlights the vital role of dual vacancies as initiating sites for the enhanced aerobic ODS.

Molybdenum Dioxide Nanoparticles Anchored on Nitrogen‐Doped Carbon Nanotubes as Oxidative Desulfurization Catalysts: Role of Electron Transfer in Activity and Reusability

“…It was worth noting that the distribution of rich oxygen vacancies was proposed to be promising active sites in the catalytic ODS reactions. [ 40–42 ]…”

“…It was worth noting that the distribution of rich oxygen vacancies was proposed to be promising active sites in the catalytic ODS reactions. [40][41][42] Hydrogen temperature-programmed reduction (H 2 -TPR) analysis was applied to investigate the reducibility of V O -MoO 2 @NC. As depicted in Figure 4c, both V O -MoO 2 @C and V O -MoO 2 @NC exhibited two main reduction peaks.…”

A current overview of the oxidative desulfurization of fuels utilizing heat and solar light: from materials design to catalysis for clean energy

“…19b). 219 The defective BNO (V-BNO) successfully acted as a catalytic promoter to facilitate the activation of O 2 in ODS and contributed to the 100% DBT removal. This phenomenon stemmed from the effect of bivacancy sites which enlarge the aperture size of BNO, resolving the blockage of vacant sites by oxygen species.…”

Aerobic Oxidative Desulfurization by Nanoporous Tungsten Oxide with Oxygen Defects

“…Hence, WO 3 suffers from some problems such as a low mass transfer rate and a pore structure that is easily blocked in the ODS process. Meanwhile, strong steric hindrance around the sulfur atom could also significantly hinder the oxidation of alkyl-substituted dibenzothiophene in the ODS process. − Although the immobilization of tungsten oxide nanoparticles onto a support with a high specific surface could enhance the reaction interface, , the reaction system still faced some problems such as aggregation and leaching of active species.…”