Imaging of Oxygen Diffusion in Individual Platinum/Ce2Zr2OxCatalyst Particles During Oxygen Storage and Release

Hirosuke Matsui, Nozomu Ishiguro, Kaori Enomoto, Oki Sekizawa, Tomoya Uruga, Mizuki Tada

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The spatial distribution of Ce3+and Ce4+in each particle of Ce2Zr2Oxin a three-way conversion catalyst system was successfully imaged during an oxygen storage/release cycle by scanning X-ray absorption fine structure (XAFS) using hard X-ray nanobeams. For the first time, nano-XAFS imaging visualized and identified the modes of non-uniform oxygen diffusion from the interface of Pt catalyst and Ce2Zr2Oxsupport and the active parts in individual catalyst particles.

Original languageEnglish
Pages (from-to)12022-12025
Number of pages4
JournalAngewandte Chemie - International Edition
Volume55
Issue number39
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes

Keywords

  • XAFS imaging
  • ceria–zirconia
  • heterogeneous catalysis
  • oxygen storage capacity
  • structure–activity relationships

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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