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Synthesis of a highly stable Pt/CeO2/Al2O3 catalyst for gasoline engine emission control by adjusting Pt distribution

Publication ,  Journal Article
Lan, L; Xiang, J; Huang, L; Huang, X; Zhou, W; Li, H; Zhu, Y; Chen, S
Published in: Canadian Journal of Chemical Engineering
April 1, 2022

For a CeO2/Al2O3-supported Pt catalyst system, the distribution of Pt is of significant importance to its hydrothermal stability and catalytic performance. Generally speaking, impregnation of a Pt precursor on CeO2/Al2O3 composite is a commonly applied approach to synthesize the catalyst. In this work, partially calcined CeO2 on Al2O3 was used as the support to modify Pt distribution. The characterization results reveal that for conventional Pt/CeO2/Al2O3, Pt is distributed on the outer surface of CeO2/Al2O3; although high dispersion of Pt is obtained for the fresh sample, severe aggregation of Pt species inevitably takes place upon hydrothermal aging treatment, leading to drastic catalyst deactivation. On the other hand, when Pt is principally embedded into the CeO2 region, the Pt/CeO2/Al2O3 catalyst has better hydrothermal stability; however, it still shows undesirable catalytic performance owing to the comparatively low dispersion of Pt on the surface. Fortunately, when Pt species are partially embedded into the CeO2 region, and the other portion is located on the outer surface of CeO2, a favourable balance between the dispersion and hydrothermal stability is realized, which consequently brings about superior three-way catalytic performance after hydrothermal aging treatment.

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Published In

Canadian Journal of Chemical Engineering

DOI

EISSN

1939-019X

ISSN

0008-4034

Publication Date

April 1, 2022

Volume

100

Issue

4

Start / End Page

827 / 837

Related Subject Headings

  • Chemical Engineering
  • 0914 Resources Engineering and Extractive Metallurgy
  • 0904 Chemical Engineering
 

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Lan, L., Xiang, J., Huang, L., Huang, X., Zhou, W., Li, H., … Chen, S. (2022). Synthesis of a highly stable Pt/CeO2/Al2O3 catalyst for gasoline engine emission control by adjusting Pt distribution. Canadian Journal of Chemical Engineering, 100(4), 827–837. https://doi.org/10.1002/cjce.24191
Lan, L., J. Xiang, L. Huang, X. Huang, W. Zhou, H. Li, Y. Zhu, and S. Chen. “Synthesis of a highly stable Pt/CeO2/Al2O3 catalyst for gasoline engine emission control by adjusting Pt distribution.” Canadian Journal of Chemical Engineering 100, no. 4 (April 1, 2022): 827–37. https://doi.org/10.1002/cjce.24191.
Lan L, Xiang J, Huang L, Huang X, Zhou W, Li H, et al. Synthesis of a highly stable Pt/CeO2/Al2O3 catalyst for gasoline engine emission control by adjusting Pt distribution. Canadian Journal of Chemical Engineering. 2022 Apr 1;100(4):827–37.
Lan, L., et al. “Synthesis of a highly stable Pt/CeO2/Al2O3 catalyst for gasoline engine emission control by adjusting Pt distribution.” Canadian Journal of Chemical Engineering, vol. 100, no. 4, Apr. 2022, pp. 827–37. Scopus, doi:10.1002/cjce.24191.
Lan L, Xiang J, Huang L, Huang X, Zhou W, Li H, Zhu Y, Chen S. Synthesis of a highly stable Pt/CeO2/Al2O3 catalyst for gasoline engine emission control by adjusting Pt distribution. Canadian Journal of Chemical Engineering. 2022 Apr 1;100(4):827–837.
Journal cover image

Published In

Canadian Journal of Chemical Engineering

DOI

EISSN

1939-019X

ISSN

0008-4034

Publication Date

April 1, 2022

Volume

100

Issue

4

Start / End Page

827 / 837

Related Subject Headings

  • Chemical Engineering
  • 0914 Resources Engineering and Extractive Metallurgy
  • 0904 Chemical Engineering