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Effect of surface tension on the properties of a doped CeO2-ZrO2 composite and its application in a Pd-only three-way catalyst

Publication ,  Journal Article
Cui, Y; Lan, L; Shi, Z; Yuan, S; Gong, M; Chen, Y; Dan, Y
Published in: RSC Advances
January 1, 2016

La and Pr modified ceria-zirconia solid solution materials CeO2-ZrO2-La2O3-Pr6O11 (CZLP) were synthesized through a co-precipitation method, in which the influence of surface tension during the drying process on the textural/structural properties, reduction behavior and oxygen storage capacity of the materials was investigated. The difference in catalytic performance of the supported Pd-only thee-way catalysts was further studied. The results revealed that CZLP3 obtained through a supercritical ethanol drying method which eliminated the surface tension in the drying process exhibited a texture with a larger pore size and wider pore size distribution. Such texture is crucial to improve the thermal stability and anti-aging ability of materials. After calcining at 1000 °C, the specific surface area, cumulative pore volume and average pore radius of CZLP3-a were 52 m2 g-1, 0.52 cm3 g-1 and 20.3 nm, respectively. The XRD and Raman results revealed that a more homogeneous solid solution of Ce, Zr, La and Pr was formed, and the aging-treatment-induced segregation of phases was inhibited for CZLP3. Besides, the slightest grain growth after the aging treatment shown in TEM images indicated the superior anti-aging ability of CZLP3. The Raman and XPS analysis demonstrated the highest concentration of oxygen vacancies and surface Ce3+ species for CZLP3 both before and after the aging treatment, which contributed to the enhancement of its reduction properties and oxygen storage capacity. Consequently, Pd/CZLP3 exhibited outstanding three-way catalytic activity compared with the others both before and after the thermal aging treatment, indicating its tremendous potential possibilities.

Duke Scholars

Published In

RSC Advances

DOI

EISSN

2046-2069

Publication Date

January 1, 2016

Volume

6

Issue

71

Start / End Page

66524 / 66536

Related Subject Headings

  • 03 Chemical Sciences
 

Citation

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Cui, Y., Lan, L., Shi, Z., Yuan, S., Gong, M., Chen, Y., & Dan, Y. (2016). Effect of surface tension on the properties of a doped CeO2-ZrO2 composite and its application in a Pd-only three-way catalyst. RSC Advances, 6(71), 66524–66536. https://doi.org/10.1039/c6ra09694h
Cui, Y., L. Lan, Z. Shi, S. Yuan, M. Gong, Y. Chen, and Y. Dan. “Effect of surface tension on the properties of a doped CeO2-ZrO2 composite and its application in a Pd-only three-way catalyst.” RSC Advances 6, no. 71 (January 1, 2016): 66524–36. https://doi.org/10.1039/c6ra09694h.
Cui Y, Lan L, Shi Z, Yuan S, Gong M, Chen Y, et al. Effect of surface tension on the properties of a doped CeO2-ZrO2 composite and its application in a Pd-only three-way catalyst. RSC Advances. 2016 Jan 1;6(71):66524–36.
Cui, Y., et al. “Effect of surface tension on the properties of a doped CeO2-ZrO2 composite and its application in a Pd-only three-way catalyst.” RSC Advances, vol. 6, no. 71, Jan. 2016, pp. 66524–36. Scopus, doi:10.1039/c6ra09694h.
Cui Y, Lan L, Shi Z, Yuan S, Gong M, Chen Y, Dan Y. Effect of surface tension on the properties of a doped CeO2-ZrO2 composite and its application in a Pd-only three-way catalyst. RSC Advances. 2016 Jan 1;6(71):66524–66536.
Journal cover image

Published In

RSC Advances

DOI

EISSN

2046-2069

Publication Date

January 1, 2016

Volume

6

Issue

71

Start / End Page

66524 / 66536

Related Subject Headings

  • 03 Chemical Sciences