title: Imaging of Oxygen Diffusion in Individual Platinum/Ce2 Zr2 Ox Catalyst Particles During Oxygen Storage and Release.
abstract: The spatial distribution of Ce(3+) and Ce(4+) in each particle of Ce2 Zr2 Ox 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 Ce2 Zr2 Ox support and the active parts in individual catalyst particles.
authors: Department of Chemistry, Graduate School of Science & Research Center for Materials Science (RCMS) & Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, Aichi, 464-8602, Japan.
authors: Hirosuke
authors: H
authors: Matsui
authors: RIKEN SPring-8 Center, Koto, Sayo, Hyogo, 679-5198, Japan.
authors: Nozomu
authors: N
authors: Ishiguro
authors: Department of Chemistry, Graduate School of Science & Research Center for Materials Science (RCMS) & Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, Aichi, 464-8602, Japan.
authors: Kaori
authors: K
authors: Enomoto
authors: Innovation Research Center for Fuel Cells, The University of Electro-Communications, Tokyo, Japan.
authors: Oki
authors: O
authors: Sekizawa
authors: Innovation Research Center for Fuel Cells, The University of Electro-Communications, Tokyo, Japan.|Japan Synchrotron Radiation Research Center, Hyogo, Japan.
authors: Tomoya
authors: T
authors: Uruga
authors: Department of Chemistry, Graduate School of Science & Research Center for Materials Science (RCMS) & Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, Aichi, 464-8602, Japan. mtada@chem.nagoya-u.ac.jp.|RIKEN SPring-8 Center, Koto, Sayo, Hyogo, 679-5198, Japan. mtada@chem.nagoya-u.ac.jp.
authors: Mizuki
authors: M
authors: Tada
keywords: XAFS imaging; ceria-zirconia; heterogeneous catalysis; oxygen storage capacity; structure-activity relationships