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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

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 (US)
Pages (from-to)2413-2420
Number of pages8
JournalInorganic chemistry
Volume55
Issue number5
DOIs
StatePublished - Mar 7 2016

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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