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Imaging of Oxygen Diffusion in Individual Platinum/Ce2Zr2Ox Catalyst Particles During Oxygen Storage and Release |
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| Authors: | Dr Hirosuke Matsui Dr Nozomu Ishiguro Kaori Enomoto Dr Oki Sekizawa Prof?Dr Tomoya Uruga Prof?Dr Mizuki Tada |
| Affiliation: | 1. Department of Chemistry, Graduate School of Science & Research Center for Materials Science (RCMS) & Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Nagoya, Aichi, Japan;2. RIKEN SPring-8 Center, Koto, Sayo, Hyogo, Japan;3. Innovation Research Center for Fuel Cells, The University of Electro-Communications, Tokyo, Japan;4. Japan Synchrotron Radiation Research Center, Hyogo, Japan |
| Abstract: | The spatial distribution of Ce3+ and Ce4+ in each particle of Ce2Zr2Ox 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 Ce2Zr2Ox support and the active parts in individual catalyst particles. |
| Keywords: | ceria– zirconia heterogeneous catalysis oxygen storage capacity structure– activity relationships XAFS imaging |
