Anionic defects engineering of Co3O4 catalyst for toluene oxidation

作者：Bao, Liurui; Zhu, Shanhui; Chen, Yi; Wang, Yu^*; Meng, Wenhao; Xu, Shuai; Lin, Zehui; Li, Xingyun^*; Sun, Ming; Guo, Limin

来源：Fuel, 2022, 314: 122774.

DOI：10.1016/j.fuel.2021.122774

• Co3O4
• Defects
• N doping
• Catalytic combustion
• VOCs

Development of advanced metal oxide catalysts for volatile organic compounds (VOCs) abatement is of great environmental and economic importance. Herein, a defective Co3O4 catalyst is delineated via N doping. The anionic defects engineering significantly facilitated the oxygen vacancies formation, leading to a distorted lattice structure, increased active surface oxygen and enhanced oxygen mobility of Co3O4 catalyst. These features promise an excellent toluene oxidation performance with 50% toluene conversion temperature (T-50) of 208 degrees C and 90 % toluene conversion temperature (T-90) of 218 degrees C at a space velocity of 60,000 mL g(-1)h(-1), about 33 degrees C and 53 degrees C lower than that of the pristine Co3O4, respectively. Meanwhile, the N doped Co3O4 catalyst maintains a high hydrothermal stability at 210 degrees C. This work exemplifies the significance of anionic defects for the intrinsic catalytic oxidation ability improvement, providing a guidance for the upgradation of the metal oxide for the application of VOCs catalytic degradation and beyond.

• 单位
  y; 青岛大学; 广东工业大学; 中国科学院; 华中科技大学