Citation: XIAO Yi-Hong, YANG Huang-Gen, CAI Guo-Hui, ZHENG Yong, ZHENG Ying, WEI Ke-Mei. Influence of Reductive Treatment on the Performance of CeO₂-ZrO₂-Al₂O₃ Composite Oxide[J]. Acta Physico-Chimica Sinica, ;2012, 28(01): 245-250. doi: 10.3866/PKU.WHXB201228245 shu

Influence of Reductive Treatment on the Performance of CeO₂-ZrO₂-Al₂O₃ Composite Oxide

1.
National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, P. R. China

Received Date: 2 September 2011
Available Online: 7 November 2011
Fund Project: 福建省工业科技重大项目(2010H6014)资助 (2010H6014)

A CeO₂-ZrO₂-Al₂O₃ composite oxide (CZA) and a CeO₂-ZrO₂ composite oxide (CZ) were prepared by the co-precipitation method. The samples were thermally aged in a flowing air atmosphere and in 10% H₂/Ar flow. The structure and performance of the composite oxides were studied by X-ray diffraction (XRD), oxygen storage capacity (OSC) measurements, and H₂ temperature-programmed reduction (H₂- TPR). The results show that a CeAlO₃ phase was formed after CZA was reductively aged at 950 °C and an increase in temperature benefited the formation of CeAlO₃. The OSC of CZA increased with an increase in the reductive treatment temperature and it was 1270.3 μmol·g^-1 when the temperature reached 900 °C. However, the OSC decreased with an increase in the temperature. After CZA was reduced at 1100 °C the OSC was only 23.2 μmol·g^-1. We found that the OSC and the reducibility of the material were remarkably influenced by the formation of a CeAlO₃ phase after CZA was reductively aged.
- CeO₂-ZrO₂-Al₂O₃ composite oxide,
- Reductive treatment,
- CeAlO₃,
- Oxygen storage capacity,
- Reducibility
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沈阳化工大学材料科学与工程学院沈阳 110142

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Influence of Reductive Treatment on the Performance of CeO₂-ZrO₂-Al₂O₃ Composite Oxide