Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (05): 1097-1106.doi: 10.3866/PKU.WHXB201302262

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Influence of Composition of Ageing System on Performance of Ce0.65Zr0.35O2 Oxygen Storage Materials

HANG Li-Hua1,2, CHEN Shan-Hu3, ZHANG Qiu-Li3, GONG Mao-Chu3, CHEN Yao-Qiang1,3   

  1. 1 Institute of construction and environment of Sichuan University, Chengdu 610064, P.R.China;
    2 Institute of environment and resource of Southwest University of Science and Technology, Mianyang 621010, Sichuan, P. R. China;
    3 College of Chemistry of Sichuan University, Chengdu 610064, P. R. China
  • Received:2012-11-27 Revised:2013-02-26 Published:2013-04-24
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21173153) and Foundation of Science and Technology of Sichuan Province, China (2011GZ0035).


Ce0.65Zr0.35O2(CZ)mixed oxides were prepared by coprecipitation. The influence of ethanol on the performance of CZ and Pd based three-way catalysts was investigated. Samples were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen sorption, oxygen storage capacity (OSC), and hydrogen temperature-programmed reduction (H2-TPR) techniques. The precipitation aging method had an appreciable impact on oxide structure and catalyst performance. Samples aged in ethanol-water system exhibited wide pore-size distributions, large pore volumes and high redox properties, OSC and thermal stabilities. After calcination at 1000 ° C, the specific surface area and OSC of the samples were 29.3 m2·g-1 and 520 μmol·g-1, respectively. The excellent structural and textural properties resulted in a high catalytic activity, wide air-to-fuel operating range, and low light-off and full-conversion temperatures to C3H8, CO, and NO of the corresponding three-way catalyst.

Key words: Ethanol-water system, Ce0.65Zr0.35O2 oxygen storage material, Structure, Performance


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