Oxidation of Toluene over Mesoporous MnO2/CeO2 Nanosphere Catalysts: Effects of the MnO2 Precursor and the Type of Support

Yan Cui; Leilei Xu; Yixin Zhang; Cai-E Wu; Weixin Zou; Lan Zhang; Ning Wang; Lin Dong; Mindong Chen

doi:10.1021/acs.inorgchem.3c01201

Oxidation of Toluene over Mesoporous MnO₂/CeO₂ Nanosphere Catalysts: Effects of the MnO₂ Precursor and the Type of Support

Inorg Chem. 2023 Jun 26;62(25):9983-10002. doi: 10.1021/acs.inorgchem.3c01201. Epub 2023 Jun 12.

Authors

Yan Cui¹, Leilei Xu¹, Yixin Zhang¹, Cai-E Wu², Weixin Zou³, Lan Zhang⁴, Ning Wang⁴, Lin Dong³, Mindong Chen¹

Affiliations

¹ Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, 210044 Nanjing, P. R. China.
² College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, P. R. China.
³ State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, P. R. China.
⁴ Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, P. R. China.

PMID: 37306510
DOI: 10.1021/acs.inorgchem.3c01201

Abstract

Toluene is the most common volatile organic compound (VOC), and the MnO₂-based catalyst is one of the excellent nonprecious metal catalysts for toluene oxidation. In this study, the effects of MnO₂ precursors and the support types on the oxidation performance of toluene were systematically explored. The results showed that the 15MnO₂/MS-CeO₂-N catalyst with Mn(NO₃)₂·4H₂O as the precursor and the mesoporous CeO₂ nanosphere (MS-CeO₂) as the support exhibited the most excellent performance. To reveal the reason behind this phenomenon, the calcination process of the catalyst precursor and the reaction process of toluene oxidation were investigated by in situ DRIFTS. It was found that the MnO₂ precursor and the type of catalyst support could have a large effect on the reaction pathway and the produced intermediates. Therefore, the roles of the MnO₂ precursor and the type of support should be key considerations when developing the high-performance MnO₂-based toluene oxidation catalyst.