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Fabrication and characterization of ZrxCe1−xO2 catalytic powder by a hydrothermal process

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2017, 27(6), pp.309-312
  • DOI : 10.6111/JKCGCT.2017.27.6.309
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : August 30, 2017
  • Accepted : November 13, 2017
  • Published : December 31, 2017

Yeon-Bin Choi 1 Jeong-hun Son 1 Jeong Ho Sohn 2 Dong-Sik Bae 1

1창원대학교
2가야대학교

Accredited

ABSTRACT

The ceria powder is excellent in oxygen storage capacity (OSC) through the oxidation and reduction reaction of Ce ions and is used as a typical material for a three-way catalyst of an automobile which purifies the exhaust gas. However, since ceria generally has poor thermal stability at high temperatures, it is doped with metal ions to improve thermal stability. Therefore, in this study, Zr ions were doped into ceria powder, and their characteristics were further improved due to the increase of specific surface area with decreasing particle size due to doping. In this study, the synthesis of zirconium doped ceria nanopowder was synthesized by hydrothermal process. In order to synthesis Zr ion doped ceria nanopowder, the precursor reaction at was 200 o C for 6 hours. The average particle size of synthesized Zr doped CeO2 nanopowder was below 20 nm. The specific surface area of synthesized Zr ion doped ceria nanopowder increased from 52.03 m 2 /g to 132.27 m 2 /g with Zr increased 30 %.

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This paper was written with support from the National Research Foundation of Korea.