Jump to main content
Jump to site search


CoMnxOy nanosheets with molecular-scale homogeneity: an excellent catalyst for toluene combustion

Author affiliations

Abstract

The process driven by “redox–precipitation” reactions between Mn7+, Co2+ and Mn2+ can yield CoMnxOy nanosheet catalysts with (quasi)molecular scaled dispersed compounds which can achieve excellent catalytic activity in toluene combustion with T50 (temperature of 50% toluene conversion) values of 172 °C and 218 °C (GHSV = 67 500 h−1 and 540 000 h−1, respectively). The as-prepared CoMnxOy nanosheets demonstrated high specific surface area, and their overall morphology changed when Mn2+ was substituted with Mn7+ during the preparation process. The enhanced catalytic performance in toluene combustion can be ascribed to very high amounts of oxygen electrophilic species (O/O2), as evidenced by XPS, H2-TPR and O2-TPD. In addition to the MnCo2O4.5 phase, Co3O4 formation can further improve the catalytic properties. According to TEM observations, the Co3O4 species were well dispersed on MnCo2O4.5 and strongly interacted with MnCo2O4.5 by forming an active Co3O4–MnCo2O4.5 interface. Toluene adsorption and O2 dissociation could occur at the active interface by creating abundant oxygen vacancies, further providing adequate O22− species to take part in toluene oxidation. The influences of water vapor and other VOCs in simulated exhaust were also evaluated. The excellent performance of the catalysts in catalytic toluene combustion demonstrates that they have great potential for practical applications.

Graphical abstract: CoMnxOy nanosheets with molecular-scale homogeneity: an excellent catalyst for toluene combustion

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Sep 2017, accepted on 27 Nov 2017 and first published on 27 Nov 2017


Article type: Paper
DOI: 10.1039/C7CY01867C
Citation: Catal. Sci. Technol., 2018, Advance Article
  •   Request permissions

    CoMnxOy nanosheets with molecular-scale homogeneity: an excellent catalyst for toluene combustion

    Y. Wang, L. Guo, M. Chen and C. Shi, Catal. Sci. Technol., 2018, Advance Article , DOI: 10.1039/C7CY01867C

Search articles by author

Spotlight

Advertisements