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Catalysis Letters

, 132:335 | Cite as

3D Ridge-Valley Structure of a Pt-Ceria Catalyst: HRTEM and EELS Spectrum Imaging

  • Uschi M. Graham
  • Rajesh A. Khatri
  • Alan Dozier
  • Gary Jacobs
  • Burtron H. Davis
Article

Abstract

Nano-ridge and valley structures formed as a result of self-aligned individual ceria nano-crystals, and HRSTEM/EELS revealed the 3-dimensional morphology profiles of the ridge and valley structures of the ceria support. After preparation of a Pt/ceria catalyst, HRSTEM indicated the preferential alignment of Pt nanoparticles inside the nano-valleys of the ceria support. EELS analyses confirmed changes in the oxidation state of ceria in the vicinity of Pt nanoparticles that are present at different depth in the valleys.

Keywords

Catalyst supports Ceria Platinum EELS HRTEM Oxidation state Water–gas-shift 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Uschi M. Graham
    • 1
  • Rajesh A. Khatri
    • 1
  • Alan Dozier
    • 2
  • Gary Jacobs
    • 1
  • Burtron H. Davis
    • 1
  1. 1.Center for Applied Energy ResearchUniversity of KentuckyLexingtonUSA
  2. 2.Electron Microscopy CenterUniversity of KentuckyLexingtonUSA

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