Related Experiment Videos
The new X-ray absorption fine-structure beamline with sub-second time resolution at the Taiwan Photon Source
Chih Wen Pao1, Jeng Lung Chen1, Jyh Fu Lee1
1National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan.
Journal of Synchrotron Radiation
|May 5, 2021
Summary
The new Taiwan Photon Source beamline enables rapid X-ray absorption fine-structure (XAFS) spectroscopy using a quick-scanning monochromator (Q-Mono). This allows for real-time analysis of material changes during experiments.
Area of Science:
- Materials Science
- Spectroscopy
- Synchrotron Radiation
Background:
- The Taiwan Photon Source (TPS) facility houses advanced synchrotron radiation beamlines for materials research.
- X-ray absorption fine-structure (XAFS) spectroscopy, including X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine-structure (EXAFS), is a powerful technique for elemental and chemical state analysis.
- Conventional XAFS measurements can be time-consuming, limiting in situ/operando studies.
Purpose of the Study:
- To introduce and characterize the new TPS 44A beamline at the National Synchrotron Radiation Research Center.
- To demonstrate the capabilities of the novel quick-scanning monochromator (Q-Mono) for rapid XAFS data acquisition.
- To showcase the beamline's utility for real-time material analysis in dynamic processes.
Main Methods:
- Installation and commissioning of the TPS 44A beamline featuring a Q-Mono.
- Acquisition of XAFS spectra (XANES and EXAFS) across various elemental K-edges (Ti, Te, Ni, Cu, Pt, Ru).
- Utilized both conventional step-by-step scans (s-scans) and on-the-fly scans (q-scans) for spectral collection.
- Employed an in situ/operando setup to study a Zn electrode during charging/discharging cycles.
Main Results:
- The Q-Mono successfully performed both s-scans and q-scans, enabling XAFS measurements at the energy range limits.
- High-quality XAFS spectra were obtained for various elements and a Cu-doped Pt/Ni nanocomposite.
- Quick-scanning XAFS (QXAFS) demonstrated stability and achieved sub-second timescale data collection.
- Real-time observation of Zn electrode states during electrochemical cycling was achieved using the in situ/operando setup.
Conclusions:
- The TPS 44A beamline with its Q-Mono is a valuable tool for advanced XAFS spectroscopy.
- The beamline facilitates rapid data acquisition, enabling time-resolved studies of materials.
- The demonstrated in situ/operando capabilities open new avenues for investigating dynamic electrochemical processes.