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Journal of Inorganic Materials

Journal of Inorganic Materials >

2010 , Vol. 25 >Issue 1: 13 - 17

DOI: https://doi.org/10.3724/SP.J.1077.2010.00013

Research Paper

Preparation and Property of Ce-Zr-Al Oxygen Storage Materials Modified by Y3+ and Bi3+ Addition

  • ZHU Qing-Chao ,
  • LI Xiu-Min ,
  • LI Hong-Mei ,
  • ZHENG Ling-Min ,
  • CHEN Yao-Qiang ,
  • GONG Mao-Chu
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  • (Key Laboratory of Green Chemistry & Technology (Ministry of Education), College of Chemistry Sichuan University, Chengdu 610064, China)

Received date: 2009-05-07

  Revised date: 2009-07-20

  Online published: 2010-01-24

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Abstract

A series of CeO2-ZrO2-Al2O3 oxygen storage materials were prepared by co-precipitation method and characterized by means of X-ray diffraction (XRD), low temperature nitrogen adsorption-desorption, oxygen storage capacity (OSC) and H2-temperature programmed reduction (H2-TPR). The results of XRD show that the phase structure of CZA are not changed by the addition of Y3+ and Bi3+, and all samples remain the single cubic fluorite structure after calcination at 600℃ and 1000℃. According to the results of low temperature nitrogen adsorption, the textural properties and thermal stability of Ce0.6Zr0.3Y0.1O1.95-Al2O3（CZYA）make a great progress after the introduction of Y3+, and after calcination at 1000℃ for 5h, specific surface area and pore volume of CZYA achieve 80.75m2/g and 0.22mL/g, respectively. The results of OSC and H2-TPR show that co-doping Y3+ and Bi3+ into CZA exhibit positive effect on OSC of the materials. The OSC of Ce0.6Zr0.2Y0.1Bi0.1O1.9-Al2O3（CZYBA）calcinated at 600℃ and 1000℃ reach 461μmol/g and 242μmol/g, respectively. Meanwhile the redox property of CZYBA is enhanced, the reduction peak temperature can be reduced from 546℃ to 429℃ after calcination at 1000℃ for 5h.

Key words： CeO2-ZrO2-Al2O3; Bi2O3; oxygen storage capacity; redox property

Cite this article

ZHU Qing-Chao , LI Xiu-Min , LI Hong-Mei , ZHENG Ling-Min , CHEN Yao-Qiang , GONG Mao-Chu . Preparation and Property of Ce-Zr-Al Oxygen Storage Materials Modified by Y3+ and Bi3+ Addition[J]. Journal of Inorganic Materials, 2010 , 25(1) : 13 -17 . DOI: 10.3724/SP.J.1077.2010.00013

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