High Thermal Stability of La2O3- and CeO2-Stabilized Tetragonal ZrO2

Shichao Wang, Hong Xie, Yuyuan Lin, Kenneth R. Poeppelmeier, Tao Li, Randall E. Winans, Yanran Cui, Fabio H. Ribeiro, Christian P. Canlas, Jeffrey W. Elam, Hongbo Zhang, Christopher L. Marshall

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Abstract

Catalyst support materials of tetragonal ZrO2, stabilized by either La2O3 (La2O3-ZrO2) or CeO2 (CeO2-ZrO2), were synthesized under hydrothermal conditions at 200°C with NH4OH or tetramethylammonium hydroxide as the mineralizer. From in situ synchrotron powder X-ray diffraction and small-angle X-ray scattering measurements, the calcined La2O3-ZrO2 and CeO2-ZrO2 supports were nonporous nanocrystallites that exhibited rectangular shapes with a thermal stability of up to 1000°C in air. These supports had an average size of 10 nm and a surface area of 59-97 m2/g. The catalysts Pt/La2O3-ZrO2 and Pt/CeO2-ZrO2 were prepared by using atomic layer deposition with varying Pt loadings from 6.3 to 12.4 wt %. Monodispersed Pt nanoparticles of 3 nm were obtained for these catalysts. The incorporation of La2O3 and CeO2 into the t-ZrO2 structure did not affect the nature of the active sites for the Pt/ZrO2 catalysts for the water-gas shift reaction.

Original languageEnglish
Pages (from-to)2413-2420
Number of pages8
JournalInorganic Chemistry
Volume55
Issue number5
DOIs
Publication statusPublished - Mar 7 2016

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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    Wang, S., Xie, H., Lin, Y., Poeppelmeier, K. R., Li, T., Winans, R. E., Cui, Y., Ribeiro, F. H., Canlas, C. P., Elam, J. W., Zhang, H., & Marshall, C. L. (2016). High Thermal Stability of La2O3- and CeO2-Stabilized Tetragonal ZrO2. Inorganic Chemistry, 55(5), 2413-2420. https://doi.org/10.1021/acs.inorgchem.5b02810