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 journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 133-139 |
Journal / Publication | Chemical Engineering Journal |
Volume | 109 |
Issue number | 1 |
Publication status | Published - 1 May 2005 |
Externally published | Yes |
Link(s)
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 journal › peer-review