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2017 Fiscal Year Final Research Report

Chemical State Visualization of FeOx Catalyst Particles by In Situ Full-Field Imaging XAFS

Research Project

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Project/Area Number 16K17863
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Physical chemistry
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Ishiguro Nozomu  国立研究開発法人理化学研究所, 放射光科学総合研究センター, 特別研究員 (20752455)

Research Collaborator TADA Mizuki  名古屋大学, 物質科学国際研究センター, 教授
MATSUI Hirosuke  名古屋大学, 物質科学国際研究センター, 助教
URUGA Tomoya  高輝度光科学研究センター, 副部門長
TAKAHASHI Yukio  大阪大学, 大学院工学研究科, 准教授
SEKIZAWA Oki  高輝度光科学研究センター, 研究員
NITTA Kiyofumi  高輝度光科学研究センター, 研究員
SUZUKI Yoya  名古屋大学, 大学院理学研究科, 大学院生
HIROSE Makoto  大阪大学, 大学院工学系究科, 大学院生
Project Period (FY) 2016-04-01 – 2018-03-31
Keywords固体触媒 / 結像顕微XAFS / タイコグラフィーXAFS / 化学状態可視化
Outline of Final Research Achievements

Visualization of chemical states of heterogeneous solid catalysts was investigated by imaging XAFS techniques to reveal relationships between their non-uniform structure and activity. Two topics as in blow were reported here.
(1) Fe chemical state of dendrite FeOx and FeCrOx were visualized by full-field imaging XAFS with 50 nm spatial-resolution, and phase-transition tendency in FeOx and FeCrOx particles during redox reaction were discussed.
(2)Ce chemical state of Ce2Zr2Ox (x=7-8) particles were successfully visualized by ptychographic-XAFS with less than 50 nm spatial resolution. Several types of local correlations found between the Ce density and Ce valence images indicated the existence of several oxidation behaviors in the oxygen storage process in the Ce2Zr2Ox particles.

Free Research Field

化学

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Published: 2019-03-29  

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