Visualization of Heterogeneous Oxygen Storage Behavior in Platinum-Supported Cerium-Zirconium Oxide Three-Way Catalyst particles by Hard X-ray Spectro-Ptychography
Visualization of Heterogeneous Oxygen Storage Behavior in Platinum-Supported Cerium-Zirconium Oxide Three-Way Catalyst particles by Hard X-ray Spectro-Ptychography
复制标题
通过硬 X 射线光谱法可视化铂负载铈锆氧化物三元催化剂颗粒中的异相储氧行为
DOI：
10.1002/ange.201710798
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Yukio Takahashi
中科院分区：
文献类型：
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作者：
Makoto Hirose;Nozomu Ishiguro;Kei Shimomura;Nicolas Burdet;Hirosuke Matsui;Mizuki Tada;Yukio Takahashi
通过硬X射线光谱法（叠层X射线吸收精细结构，XAFS）成功绘制了微米级铂负载氧化铈锆Pt/Ce2Zr2Ox（x=7-8）三效催化剂颗粒中的铈密度和化合价。对叠层XAFS图像中Ce密度和价态之间的相关性分析表明，Ce2Zr2Ox颗粒的储氧过程中存在多种氧化行为。 Ptychography-XAFS 将开启多相催化剂的纳米级化学成像和结构分析。
The cerium density and valence in micrometer‐size platinum‐supported cerium–zirconium oxide Pt/Ce2Zr2Ox(x=7–8) three‐way catalyst particles were successfully mapped by hard X‐ray spectro‐ptychography (ptychographic‐X‐ray absorption fine structure, XAFS). The analysis of correlation between the Ce density and valence in ptychographic‐XAFS images suggested the existence of several oxidation behaviors in the oxygen storage process in the Ce2Zr2Oxparticles. Ptychographic‐XAFS will open up the nanoscale chemical imaging and structural analysis of heterogeneous catalysts.