Issue 19, 2016

Boosting soot combustion efficiencies over CuO–CeO2 catalysts with a 3DOM structure

Abstract

Three-dimensionally ordered macroporous CuO–CeO2 catalysts were successfully synthesized by the colloidal crystal template route and systematically characterized by means of XRD, FESEM, HRTEM, BET, XPS, FTIR, H2-TPR and O2-TPD. The 3DOM CeO2 with a CuO loading amount of 9.7 wt% exhibited the optimal catalytic activity, giving a Tm of 427 °C and an exceptionally high CO2 selectivity of nearly 100%. This superior activity was attributed to the enlarged contact area between the catalyst and soot particles, the improved mass transfer caused by the well-defined 3DOM structure and the enhanced redox capability at low temperatures mainly associated with the highly dispersed copper species. Meanwhile, the effect of feed compositions on soot combustion efficiencies revealed that NO and H2O had a crucial promoting effect on the catalytic oxidation of soot particles because NO2 formed via in situ NO oxidation during the reaction and H2O significantly reduced the activation energy of carbon. Furthermore, this catalyst also demonstrated strong durability against structural collapse owing to the well-defined and robust 3DOM structure, indicating its potential applications under practical working conditions.

Graphical abstract: Boosting soot combustion efficiencies over CuO–CeO2 catalysts with a 3DOM structure

Supplementary files

Article information

Article type
Paper
Submitted
26 Jun 2016
Accepted
09 Aug 2016
First published
10 Aug 2016

Catal. Sci. Technol., 2016,6, 7342-7350

Boosting soot combustion efficiencies over CuO–CeO2 catalysts with a 3DOM structure

J. Wang, L. Cheng, W. An, J. Xu and Y. Men, Catal. Sci. Technol., 2016, 6, 7342 DOI: 10.1039/C6CY01366J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements