4.5 Article

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

Journal

CATALYSIS LETTERS
Volume 132, Issue 3-4, Pages 335-341

Publisher

SPRINGER
DOI: 10.1007/s10562-009-0140-7

Keywords

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

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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.

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