Investigation of redox-cycled Ce-Zr mixed oxides for automotive catalysts by electron microscopy

R T Baker, S Bernal, C Lopez-Cartes, J A Perez-Omil, Y Montardi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

High-resolution transmission electron microscopy (HRTEM) has been used to study the structural changes occurring in Ce-Zr mixed oxides on redox cycling. The initial fcc fluorite-type phase is seen to be modified by this redox cycling to give rise to a new phase similar to the original but with apparent 2x2x2 superstructure. Structural models incorporating concerted displacement of anions, cation ordering or both of these phenomena occurring together were constructed. The images simulated using each of these models showed good agreement with the experimental results suggesting that all are possible structures for the new phase.

Original languageEnglish
Title of host publicationElectron microscopy and analysis 1999: proceedings of the Institute of Physics Electron Microscopy and Analysis Group conference, University of Sheffield, 24-27 August 1999
EditorsC.J. Kiely
PublisherInstitute of Physics
Pages521-524
Number of pages4
ISBN (Print)0-7503-0577-0
Publication statusPublished - 1999
EventBiennial Meeting of the Electron Microscopy and Analysis Group of the Institute of Physics (EMAG 99) - Sheffield, United Kingdom
Duration: 24 Aug 199927 Aug 1999

Publication series

Name Institute of Physics Conference Series
Volume161
ISSN (Print)0951-3248

Conference

ConferenceBiennial Meeting of the Electron Microscopy and Analysis Group of the Institute of Physics (EMAG 99)
Country/TerritoryUnited Kingdom
CitySheffield
Period24/08/9927/08/99

Keywords

  • BEHAVIOR

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