Tuning the water resistance of Co3O4 catalysts via Ce incorporation for enhanced catalytic oxidation of toluene

Shiyao Wang, Pengfei Zhang, Xi Zhang, Detao Xia, Peng Zhao, Jie Meng, Nengjie Feng, Hui Wan, Guofeng Guan

Research output: Contribution to journalArticlepeer-review

Abstract

It is important to design and develop catalysts with good water resistance to cope with the toxicity of water vapor on catalyst activity. In this study, we proposed a simple method to improve the water resistance of catalysts for toluene catalytic combustion by preparing a series of Co-Ce composite oxide catalysts via a citrate sol–gel method. Experimental results showed that Co6Ce1Ox exhibited the best catalytic activity (T50 = 236 ℃ T90 = 251 ℃) and water resistance among all the catalysts. The crystal structure and surface chemistry of the catalysts were analyzed using a series of correlation characterizations, and the adsorption energies of toluene and water on the catalysts were calculated using density functional theory (DFT). The results showed that the doping of Ce in Co3O4 had not only effectively changed the oxygen distribution state of Co3O4 and increased its oxygen vacancy content, thus greatly enhancing the oxidizing ability of the catalyst, but also suppressed the adsorption of H2O on the surface of the catalyst, and significantly enhanced the water resistance of the catalyst. The present work provided a new idea and method for developing efficient and excellent water resistant catalysts for the catalytic oxidation of toluene.

Original languageEnglish
Article number162721
JournalApplied Surface Science
Volume692
DOIs
StatePublished - 30 May 2025

Keywords

  • Ce doping
  • CoO
  • Toluene catalytic oxidation
  • Water resistance

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