Impact Factor:

6.119

DOI number:

10.1039/D1CY01274F

Affiliation of Author(s):

中国科学院大学

Journal:

Catalysis Science & Technology

Funded by:

重庆市科技局，重庆工商大学

Key Words:

Nano-MnO2 catalyst；Toluene；Catalytic oxidation

Abstract:

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.

First Author:

Hongmei Xie,Jia Zeng

Co-author:

Zhao Liu,Xuecheng Liu

Indexed by:

源刊论文

Correspondence Author:

Guilin Zhou,Yi Jiang

Discipline:

Engineering

Document Type:

Journal Article

Volume:

11

Page Number:

6708–6723

Translation or Not:

no

Date of Publication:

2021-08-02

Included Journals:

SCI

Links to published journals:

https://doi.org/10.1039/D1CY01274F