Imaging of Oxygen Diffusion in Individual Platinum/Ce2 Zr2 Ox Catalyst Particles During Oxygen Storage and Release.
Imaging of Oxygen Diffusion in Individual Platinum/Ce2 Zr2 Ox Catalyst Particles During Oxygen Storage and Release.
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DOI：
10.1002/anie.201606046
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发表时间：
2016-09
影响因子：
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通讯作者：
H. Matsui;N. Ishiguro;Kaori Enomoto;O. Sekizawa;T. Uruga;Mizuki Tada
中科院分区：
文献类型：
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作者：
H. Matsui;N. Ishiguro;Kaori Enomoto;O. Sekizawa;T. Uruga;Mizuki Tada
采用硬X射线纳米棒扫描X射线吸收精细结构(XAFS)技术，成功地研究了Ce(3+)和Ce(4+)在三效转化催化剂体系中的储放氧循环过程中的空间分布。首次用纳米XAFS成像技术直观地观察和识别了铂催化剂与Ce2-ZR2-Ox载体界面上氧的不均匀扩散方式以及催化剂颗粒中的活性部分。
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.