| Literature DB >> 29230942 |
Makoto Hirose1,2, Nozomu Ishiguro2, Kei Shimomura1,2, Nicolas Burdet2,3, Hirosuke Matsui4, Mizuki Tada2,4, Yukio Takahashi1,2.
Abstract
The cerium density and valence in micrometer-size platinum-supported cerium-zirconium oxide Pt/Ce2 Zr2 Ox (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 Ce2 Zr2 Ox particles. Ptychographic-XAFS will open up the nanoscale chemical imaging and structural analysis of heterogeneous catalysts.Entities:
Keywords: X-ray spectro-ptychography; ceria-zirconia; oxygen storage; three-way catalysts
Year: 2018 PMID： 29230942 DOI： 10.1002/anie.201710798
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN： 1433-7851 Impact factor: 15.336