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The influence of H2O2 on the properties of CeO2-ZrO2 mixed oxides

Publication ,  Journal Article
Deng, J; Zhou, Y; Cui, Y; Lan, L; Wang, J; Yuan, S; Chen, Y
Published in: Journal of Materials Science
May 1, 2017

A series of ceria-zirconia (CZ) mixed oxides were prepared by coprecipitation, in which different amounts of H2O2 were added to investigate the influence of H2O2 on the properties of CZ. Modifications in structure, oxygen storage capacity, reducibility and thermal stability were studied systematically. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results revealed that the thermal stability of the material was dramatically improved by the addition of H2O2, which was mainly due to the increase of the solubility of ZrO2 in ceria from 4.7 to 69.3%. The study of UV Raman spectroscopy confirmed that the concentration of defect sites of CZ materials increased with increasing H2O2/Ce molar ratio. The material prepared with H2O2/Ce molar ratio of 2 (CZ-2) exhibited the highest structural stability, the solubility of which was 68.8 and 69.3% before and after thermal treatment, and it maintained a homogeneous single cubic phase even after aging treatment at 1000 °C for 3 h. Also the highest thermal stability of the oxygen storage capacity (OSC) was found in CZ-2, which showed the reduction rates of 80.4 and 76.4% before and after thermal treatment. Moreover, a reaction mechanism of H2O2 and metal ions in the mixed precursor solution was assumed, in which the cerium-peroxide bridge-zirconium complex structure was proposed.

Duke Scholars

Published In

Journal of Materials Science

DOI

EISSN

1573-4803

ISSN

0022-2461

Publication Date

May 1, 2017

Volume

52

Issue

9

Start / End Page

5242 / 5255

Related Subject Headings

  • Materials
  • 09 Engineering
  • 03 Chemical Sciences
 

Citation

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Deng, J., Zhou, Y., Cui, Y., Lan, L., Wang, J., Yuan, S., & Chen, Y. (2017). The influence of H2O2 on the properties of CeO2-ZrO2 mixed oxides. Journal of Materials Science, 52(9), 5242–5255. https://doi.org/10.1007/s10853-017-0765-7
Deng, J., Y. Zhou, Y. Cui, L. Lan, J. Wang, S. Yuan, and Y. Chen. “The influence of H2O2 on the properties of CeO2-ZrO2 mixed oxides.” Journal of Materials Science 52, no. 9 (May 1, 2017): 5242–55. https://doi.org/10.1007/s10853-017-0765-7.
Deng J, Zhou Y, Cui Y, Lan L, Wang J, Yuan S, et al. The influence of H2O2 on the properties of CeO2-ZrO2 mixed oxides. Journal of Materials Science. 2017 May 1;52(9):5242–55.
Deng, J., et al. “The influence of H2O2 on the properties of CeO2-ZrO2 mixed oxides.” Journal of Materials Science, vol. 52, no. 9, May 2017, pp. 5242–55. Scopus, doi:10.1007/s10853-017-0765-7.
Deng J, Zhou Y, Cui Y, Lan L, Wang J, Yuan S, Chen Y. The influence of H2O2 on the properties of CeO2-ZrO2 mixed oxides. Journal of Materials Science. 2017 May 1;52(9):5242–5255.
Journal cover image

Published In

Journal of Materials Science

DOI

EISSN

1573-4803

ISSN

0022-2461

Publication Date

May 1, 2017

Volume

52

Issue

9

Start / End Page

5242 / 5255

Related Subject Headings

  • Materials
  • 09 Engineering
  • 03 Chemical Sciences