Hyperspectral full-field quick-EXAFS imaging at the ROCK beamline for monitoring micrometre-sized heterogeneity of functional materials under process conditions
Full-field transmission X-ray microscopy has been recently implemented at the hard X-ray ROCK-SOLEIL quick-EXAFS beamline, adding micrometre spatial resolution to the second time resolution characterizing the beamline. Benefiting from a beam size versatility due to the beamline focusing optics, full-field hyperspectral XANES imaging has been successfully used at the Fe K-edge for monitoring the pressure-induced spin transition of a 150 µm × 150 µm Fe(o-phen)<sub>2</sub>(NCS)<sub>2</sub> single crystal and the charge of millimetre-sized LiFePO<sub>4</sub> battery electrodes. Hyperspectral imaging over 2000 eV has been reported for the simultaneous monitoring of Fe and Cu speciation changes during activation of a FeCu bimetallic catalyst along a millimetre-sized catalyst bed. Strategies of data acquisition and post-data analysis using Jupyter notebooks and multivariate data analysis are presented, and the gain obtained using full-field hyperspectral quick-EXAFS imaging for studies of functional materials under process conditions in comparison with macroscopic information obtained by non-spatially resolved quick-EXAFS techniques is discussed.
Authors
- Andrew King (ORCID: https://orcid.org/0000-0001-8542-1354)
- Stéphanie Belin (ORCID: https://orcid.org/0000-0002-4041-7201)
- Anthony Beauvois (ORCID: https://orcid.org/0000-0003-0804-8642)
- A. Polian (ORCID: https://orcid.org/0000-0003-2261-9114)
- Valérie Briois (ORCID: https://orcid.org/0000-0002-8172-2755)
- Camille La Fontaine (ORCID: https://orcid.org/0000-0002-6586-6222)
- Ovidiu Ersen (ORCID: https://orcid.org/0000-0002-1553-0915)
- Laurent Barthe
- Olga Roudenko
- Aliou Sadia Traoré
- Jean Paul Itié
- Éric Marceau (ORCID: https://orcid.org/0000-0001-9602-555X)
Institutions
- Centre National de la Recherche Scientifique (FR)
- Synchrotron soleil (FR)
- Institut de Physique et Chimie des Matériaux de Strasbourg (FR)
- Unité de catalyse et de chimie du solide de Lille (FR)
- Institut de minéralogie, de physique des matériaux et de cosmochimie (FR)
- Université de Strasbourg (FR)
Publication Details
- Journal
- Journal of Synchrotron Radiation
- Published
- 2024-08-23
- DOI
- https://doi.org/10.1107/s1600577524006581
- Citations
- 4
- Primary Topic
- X-ray Spectroscopy and Fluorescence Analysis
- Type
- article
- Field-Weighted Citation Impact
- 2.43
Funders
- Agence Nationale de la Recherche