Promotion effect of SO42−/Fe2O3 modified MnOx catalysts for simultaneous control of NO and CVOCs

To improve the simultaneous removal of NOx and CVOCs catalytic activity for MnOx catalysts, SO42−/Fe2O3 modified catalysts were prepared by the coprecipitation method. Compared with pure MnOx, the activity of the SO42–0.10Fe–MnOx catalysts was significantly improved, with >90% NO conversion and C...

Full description

Saved in:
Bibliographic Details
Published inSurfaces and interfaces Vol. 33; p. 102253
Main Authors Gong, Pijun, Cao, Ruiqing, Yu, Yihong, Zhang, Jinxiao
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2022
Subjects
Cooperative control
CVOCs
NOx
Promotion effect
SO42−/Fe2O3–MnOx catalysts
CVOCs
NOx
Cooperative control
SO42−/Fe2O3–MnOx catalysts
Promotion effect
Online AccessGet full text

Cover

More Information
Summary:To improve the simultaneous removal of NOx and CVOCs catalytic activity for MnOx catalysts, SO42−/Fe2O3 modified catalysts were prepared by the coprecipitation method. Compared with pure MnOx, the activity of the SO42–0.10Fe–MnOx catalysts was significantly improved, with >90% NO conversion and CB oxidation. The synergistic effect between SO42−/Fe2O3 and Mn can lead to higher BET, Mn4+/Mn3+ and oxygen vacancy contents, which can provide large number of acid sites. In addition, the characterization results showed that SO42−/Fe2O3 modification led to the generation of more Fe2+/Fe3+ species and chemisorbed oxygen species, and the reduction performance of the catalyst can be influenced by the redox cycle: Fe2+ + Mn4+ ↔ Fe3+ + Mn3+. Therefore, the enhancement of redox performance and abundant surface acidic sites are the main reasons for the improvement of synergistic catalytic activity over SO42–0.10Fe–MnOx catalysts.
ISSN:2468-0230
2468-0230
DOI:10.1016/j.surfin.2022.102253