Effect of preparation methods on the structure and redox behavior of platinum-ceria-zirconia catalysts

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xiaodong Wu
  • Jun Fan
  • Rui Ran
  • Duan Weng

Detail(s)

Original languageEnglish
Pages (from-to)133-139
Journal / PublicationChemical Engineering Journal
Volume109
Issue number1
Publication statusPublished - 1 May 2005
Externally publishedYes

Abstract

Platinum was introduced into ceria-zirconia solid solutions to form nominal Ce0.66Zr0.32Pt0.02O2 solid solutions by sol-gel. It was found that, through sol-gel method, the Pt ions could be inserted into the ceria lattice according to the results of XRD, XPS and TPR analyses. This brought about a different synergistic effect between the Pt and Ce components in Ce0.66Zr0.32Pt 0.02O2 compared with the Pt/Ce0.67Zr 0.33O2 system prepared by traditional impregnation, such as increased the oxygen mobility in ceria-zirconia solid solutions and improved the stability of metallic state for platinum at high temperature. The lower surface Pt content leads to a worse three-way catalytic activity over the Pt-doped sample at low temperature. However, it features a better thermal stability after aging at 950°C for 20 h, implying a self-generation mechanism of noble metals. This, in return, provides this material with a potential to be used in eliminating pollutants from auto exhaust. © 2005 Elsevier B.V. All rights reserved.

Research Area(s)

  • Ceria-zirconia solid solutions, Platinum, Synthesis, Three-way catalysts

Citation Format(s)

Effect of preparation methods on the structure and redox behavior of platinum-ceria-zirconia catalysts. / Wu, Xiaodong; Fan, Jun; Ran, Rui; Weng, Duan.

In: Chemical Engineering Journal, Vol. 109, No. 1, 01.05.2005, p. 133-139.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review