Promoting effect of ZrO2 carrier on activity and thermal stability of CeO2-based oxides catalysts for toluene combustion

Authors: Han-Feng Lu, Ying Zhou, Wen-Feng Han, Hai-feng Huang, Yin-Fei Chen

Abstract:
ZrO₂ was used as a support for the preparation of Cu–Mn–Ce mixed oxides catalysts (CMC) by impregnation method and calcination at different temperatures. A model reaction, toluene combustion was conducted to evaluate the performance of CMC/ZrO₂ catalysts. High thermal stability and activity was obtained on these catalysts. The effects of CMC loading and calcination temperature on the structure and redox properties of catalysts were also investigated by XRD, H2-TPR, TEM and XPS. Results show that calcination leads to the interaction of ZrO₂ and CMC via the formation of a new phase of Zr_0.88Ce_0.12O₂ in the interface, which is more likely to be formed in the catalysts with low CMC loading levels. Zr_0.88Ce_0.12O₂ seems to function as the actual carrier of active phase of CMC, which cannot only stabilize the surface active structure of CMC but also enhance the mobility of active oxygen and improve the catalytic performance of total oxidation as well.

Keywords:
CeO₂-based oxides
Carrier effect
Thermal stability
Catalytic combustion
Toluene

Published in: Applied catalysis A: General  (Volumes 464–465, Pages 1-384, 15 August 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

Promoting effect of ZrO2 carrier on activity and thermal stability of CeO2-based oxides catalysts for toluene combustion

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