Visualization of Heterogeneous Oxygen Storage Behavior in Platinum-Supported Cerium-Zirconium Oxide Three-Way Catalyst Particles by Hard X-ray Spectro-Ptychography.

Author(s) Hirose, M.; Ishiguro, N.; Shimomura, K.; Burdet, N.; Matsui, H.; Tada, M.; Takahashi, Y.
Journal Angew Chem Int Ed Engl
Date Published 2018 Feb 05

The cerium density and valence in micrometer-size platinum-supported cerium-zirconium oxide Pt/Ce2 Zr2 Ox (x=7-8) three-way catalyst particles were successfully mapped by hard X-ray spectro-ptychography (ptychographic-X-ray absorption fine structure, XAFS). The analysis of correlation between the Ce density and valence in ptychographic-XAFS images suggested the existence of several oxidation behaviors in the oxygen storage process in the Ce2 Zr2 Ox particles. Ptychographic-XAFS will open up the nanoscale chemical imaging and structural analysis of heterogeneous catalysts.

DOI 10.1002/anie.201710798
ISSN 1521-3773
Citation Angew Chem Int Ed Engl. 2018;57(6):14741479.

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