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

Makoto Hirose, Nozomu Ishiguro, Kei Shimomura, Nicolas Burdet, Hirosuke Matsui, Mizuki Tada, Yukio Takahashi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The cerium density and valence in micrometer-size platinum-supported cerium–zirconium oxide Pt/Ce2Zr2Ox (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 Ce2Zr2Ox particles. Ptychographic-XAFS will open up the nanoscale chemical imaging and structural analysis of heterogeneous catalysts.

Original languageEnglish
Pages (from-to)1474-1479
Number of pages6
JournalAngewandte Chemie - International Edition
Volume57
Issue number6
DOIs
Publication statusPublished - 2018 Feb 5
Externally publishedYes

Keywords

  • X-ray spectro-ptychography
  • ceria–zirconia
  • oxygen storage
  • three-way catalysts

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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