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Imaging of Oxygen Diffusion in Individual Platinum/Ce 2 Zr 2 O x Catalyst Particles During Oxygen Storage and Release
Author(s) -
Matsui Hirosuke,
Ishiguro Nozomu,
Enomoto Kaori,
Sekizawa Oki,
Uruga Tomoya,
Tada Mizuki
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201606046
Subject(s) - platinum , oxygen storage , oxygen , catalysis , diffusion , materials science , analytical chemistry (journal) , chemistry , physics , environmental chemistry , thermodynamics , organic chemistry
The spatial distribution of Ce 3+ and Ce 4+ in each particle of Ce 2 Zr 2 O x in 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 Ce 2 Zr 2 O x support and the active parts in individual catalyst particles.