Oxygen vacancy induced MnO2 catalysts for efficient toluene catalytic oxidation
发布时间：2024-11-30
点击次数：
- 影响因子：
- 6.119
- DOI码：
- 10.1039/D1CY01274F
- 所属单位：
- 中国科学院大学
- 发表刊物：
- Catalysis Science & Technology
- 项目来源：
- 重庆市科技局，重庆工商大学
- 关键字：
- Nano-MnO2 catalyst；Toluene；Catalytic oxidation
- 摘要：
- Oxygen vacancies play a vital role in catalytic oxidation, and engineering oxygen vacancies onto Mn oxide catalysts is still a great challenge. Herein, oxygen vacancies have been simply tuned on α-MnO2 by a facile redox method and used for catalytic toluene oxidation. The MnO2-1.8 catalyst exhibited superior catalytic activity (T90 = 238 °C, 1000 ppm and T90 = 170 °C, 10,000 ppm) for toluene deep oxidation, robust stability, and water resistance. It has the highest oxygen vacancy concentration due to highly proportioned exposed high-index {310} facets and interfaces between facets. The correlation between oxygen vacancies and the textural structure and activity was scientifically investigated by various characterization technologies and density functional theory (DFT) calculations. The oxygen vacancy weakens the Mn–O bond strength, increases the amount of surface adsorbed active oxygen species, and improves the mobility of lattice oxygen species, resulting in the significant promotion of the catalytic activity. This paper presents a novel and facile redox synthesis method for enriching the oxygen vacancy engineering strategy and provides a deep understanding for developing high-activity Mn-based catalysts for the VOC degradation.
- 第一作者：
- Hongmei Xie,Jia Zeng
- 合写作者：
- Zhao Liu,Xuecheng Liu
- 论文类型：
- 源刊论文
- 通讯作者：
- Guilin Zhou,Yi Jiang
- 学科门类：
- 工学
- 文献类型：
- Journal Article
- 卷号：
- 11
- 页面范围：
- 6708–6723
- 是否译文：
- 否
- 发表时间：
- 2021-08-02
- 收录刊物：
- SCI