Journal Article

Effect of acid/alkali treatment on the structure and catalytic performance of 3DOM CeCo0.7Mn0.3O3 catalyst

Li, Shi, Wang, Jiawei, Liu, Qingqing, Ma, Xiubiao, Wang, Yongqiang, Liu, Fang, Zhang, Tianjiao, Guo, Jia

2023

Overview

In this work, Ce was used as the A-site element and three-dimensional ordered macroporous (3DOM) materials as the template to obtain 3DOM CeCo 0.7 Mn 0.3 O 3 catalyst via excessive impregnation method. The catalyst was subjected to acid/alkali treatment with dilute nitric acid and sodium hydroxide solutions. The results revealed that the catalysts subjected to acid/alkali treatment exhibited better structural and catalytic activity characteristics than the bulk catalyst. Specifically, the specific surface area of the catalyst treated with acid increased from 34.86 to 60.67 m 2 ·g -1 , and the relative contents of O ads and Mn 4+ species increased. Moreover, the T 90% further decreased to 174 °C. As for the catalyst treated with alkali, it exhibited a rougher surface and a wider pore size distribution, producing more lattice defects which were favorable for reaction progress. The T 90% was 183 °C, indicating that acid/alkali treatment both had a positive effect on the catalytic oxidation of toluene.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V
• Subject: Acids / alkali treatment / Aquatic Pollution / Atmospheric Protection/Air Quality Control/Air Pollution / Catalysts / Catalytic activity / Catalytic oxidation / Caustic soda / Crystal defects / Earth and Environmental Science / Ecotoxicology / Environment / Environmental Chemistry / Environmental Health / Nitric acid / Oxidation / Pore size / Pore size distribution / porosity / Porous materials / porous media / Precious metals / Research Article / Size distribution / Sodium hydroxide / species / surface area / Toluene / VOCs / Volatile organic compounds / Waste Water Technology / Water Management / Water Pollution Control