Preparation of ceria-zirconia solid solution with enhanced oxygen storage capacity and redox performance

2010, Volume 4, Issue 2

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Frontiers of Environmental Science & Engineering >> 2010, Volume 4, Issue 2 doi: 10.1007/s11783-010-0019-2

Preparation of ceria-zirconia solid solution with enhanced oxygen storage capacity and redox performance

1.Laboratory of Catalysis Chemistry and Nanoscience, College of Environment and Energy Engineering, Beijing University of Technology, Beijing 100124, China; 2.State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China; 3.State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China;

Available online: 2010-06-05

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Abstract

A new method called ultrasonic-assisted membrane reaction (UAMR) was reported for the fabrication of ceria-zirconia solid solution. A series of ceria-zirconia solid solutions with different Ce/Zr molar ratios were prepared by the UAMR method and characterized by X-ray diffraction (XRD), N adsorption, hydrogen temperature-programmed reduction (H-TPR), scanning electron microscope (SEM), and transmission electron microscopy (TEM) techniques. The UAMR method proved to be superior, especially when the Ce/Zr molar ratio was lower than 1, in fabricating ceria-zirconia solid solutions with large BET surface area, high oxygen storage capacity (OSC), and low reduction temperature.

Keywords

membrane reaction ; ceria-zirconia ; Ce/Zr molar ratio ; solid solution ; hydrogen temperature-programmed reduction (H2-TPR)

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