Low-temperature catalytic combustion of trichloroethylene over MnOx-CeO2 mixed oxide catalysts

The cerium-based catalysts were investigated for the catalytic combustion of trichloroethylene (TCE) and exhibit a surprising catalytic activity. MnOx was doped into CeO2 by a citric acid (CA) sol-gel method, and the effect of Mn content on the physicochemical properties and catalytic activities of MnOx-CeO2 mixed oxides was investigated systemically. The introduction of MnOx into CeO2 can evidently improve the catalytic activity and reaction stability of the CeO2 catalyst, and the catalytic activity can be maintained for more than 100 h at 250 degrees C under air atmosphere. Moreover, a possible reaction mechanism and a catalytic cycle for the catalytic combustion of TCE over the MnOx-CeO2 mixed oxide catalysts are proposed.(c) 2022 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

Automated summary

The catalytic combustion of trichloroethylene (TCE) was studied using cerium-based catalysts, which exhibited surprising catalytic activity. MnOx was doped into CeO2 using a citric acid sol-gel method, and the effect of Mn content on the physicochemical properties and catalytic activities of MnOx-CeO2 mixed oxides was systematically investigated. The introduction of MnOx into CeO2 significantly improved the catalytic activity and reaction stability of the CeO2 catalyst, and the catalytic activity could be maintained for over 100 hours under an air atmosphere. Moreover, a possible reaction mechanism and catalytic cycle for the catalytic combustion of TCE over MnOx-CeO2 mixed oxide catalysts are proposed.