1
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Shirasawa T, Voegeli W, Arakawa E. Simultaneous fast XAS/SAXS measurements in an energy-dispersive mode. Phys Chem Chem Phys 2024; 26:18493-18499. [PMID: 38916534 DOI: 10.1039/d4cp01399a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
X-ray absorption spectroscopy (XAS) and small-angle X-ray scattering (SAXS) are common materials characterization tools at synchrotron radiation facilities used in many research fields. Since XAS can provide element-specific chemical states and local atomic structures and SAXS can provide nano-scale structural information, their complementary use is advantageous for a comprehensive understanding of multiscale phenomena. This paper presents a new method for simultaneous XAS/SAXS measurements with synchrotron radiation. The method employs a polychromatic X-ray beam as in the energy-dispersive XAS technique and captures both the transmission XAS spectrum and the SAXS intensity distribution with an area X-ray detector, which eliminates the energy scan in the conventional methods and realizes the simultaneous data acquisition in a shorter time. We succeeded in obtaining the atomic and nano-scale structures of Pt and Pt/Pd nanoparticles with a data acquisition time of 0.1 s, suggesting the potential for real-time observation of multiscale phenomena.
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Affiliation(s)
- Tetsuroh Shirasawa
- Research Institute for Material and Chemical Measurement, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan.
| | - Wolfgang Voegeli
- Natural Sciences Division, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
| | - Etsuo Arakawa
- Natural Sciences Division, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
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2
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Harmand M, Cammarata M, Chollet M, Krygier AG, Lemke HT, Zhu D. Single-shot X-ray absorption spectroscopy at X-ray free electron lasers. Sci Rep 2023; 13:18203. [PMID: 37875533 PMCID: PMC10598033 DOI: 10.1038/s41598-023-44196-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 10/04/2023] [Indexed: 10/26/2023] Open
Abstract
X-ray Absorption Spectroscopy (XAS) is a widely used X-ray diagnostic method for studying electronic and structural properties of matter. At first glance, the relatively narrow bandwidth and the highly fluctuating spectral structure of X-ray Free Electron Lasers (XFEL) sources seem to require accumulation over many shots to achieve high data quality. To date the best approach to implementing XAS at XFEL facilities has been using monochromators to scan the photon energy across the desired spectral range. While this is possible for easily reproducible samples such as liquids, it is incompatible with many important systems. Here, we demonstrate collection of single-shot XAS spectra over 10s of eV using an XFEL source, with error bars of only a few percent. We additionally show how to extend this technique over wider spectral ranges towards Extended X-ray Absorption Fine Structure measurements, by concatenating a few tens of single-shot measurements. Our results pave the way for future XAS studies at XFELs, in particular those in the femtosecond regime. This advance is envisioned to be especially important for many transient processes that can only be initiated at lower repetition rates, for difficult to reproduce excitation conditions, or for rare samples, such as those encountered in high-energy density physics.
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Affiliation(s)
- Marion Harmand
- IMPMC, Sorbonne Université, UMR CNRS 7590, MNHN, 75005, Paris, France.
| | - Marco Cammarata
- Institut de Physique de Rennes, UMR UR1-CNRS 6251, Université de Rennes 1, 35042, Rennes, France
- European Synchrotron Radiation Facility, Grenoble, France
| | - Matthieu Chollet
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Andrew G Krygier
- IMPMC, Sorbonne Université, UMR CNRS 7590, MNHN, 75005, Paris, France
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA
| | - Henrik T Lemke
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
- SwissFEL, Paul Scherrer Institut, Villigen, 5232, Switzerland
| | - Diling Zhu
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
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3
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Zabilska A, Clark AH, Ferri D, Nachtegaal M, Kröcher O, Safonova OV. Beware of beam damage under reaction conditions: X-ray induced photochemical reduction of supported VO x catalysts during in situ XAS experiments. Phys Chem Chem Phys 2022; 24:21916-21926. [PMID: 36069029 PMCID: PMC9641748 DOI: 10.1039/d2cp02721f] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/20/2022] [Indexed: 11/04/2023]
Abstract
In situ X-ray absorption spectroscopy (XAS) is a powerful technique for the investigation of heterogeneous catalysts and electrocatalysts. The obtained XAS spectra are usually interpreted from the point of view of the investigated chemical processes, thereby sometimes omitting the fact that intense X-ray irradiation may induce additional transformations in metal speciation and, thus, in the corresponding XAS spectra. In this work, we report on X-ray induced photochemical reduction of vanadium in supported vanadia (VOx) catalysts under reaction conditions, detected at a synchrotron beamline. While this process was not observed in an inert atmosphere and in the presence of water vapor, it occurred at room temperature in the presence of a reducing agent (ethanol or hydrogen) alone or mixed with oxygen. Temperature programmed experiments have shown that X-ray induced reduction of VOx species appeared very clear at 30-100 °C but was not detected at higher temperatures, where the thermocatalytic ethanol oxidative hydrogenation (ODH) takes place. Similar to other studies on X-ray induced effects, we suggest approaches, which can help to mitigate vanadium photoreduction, including defocusing of the X-ray beam and attenuation of the X-ray beam intensity by filters. To recognize beam damage under in situ/operando conditions, we suggest performing X-ray beam switching (on and off) tests at different beam intensities under in situ conditions.
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Affiliation(s)
- Anna Zabilska
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
- École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Adam H Clark
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
| | - Davide Ferri
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
| | | | - Oliver Kröcher
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
- École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
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4
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Leshchev D, Rakitin M, Luvizotto B, Kadyrov R, Ravel B, Attenkofer K, Stavitski E. The Inner Shell Spectroscopy beamline at NSLS-II: a facility for in situ and operando X-ray absorption spectroscopy for materials research. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:1095-1106. [PMID: 35787577 PMCID: PMC9255565 DOI: 10.1107/s160057752200460x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 05/01/2022] [Indexed: 05/14/2023]
Abstract
The Inner Shell Spectroscopy (ISS) beamline on the 8-ID station at the National Synchrotron Light Source II (NSLS-II), Upton, NY, USA, is a high-throughput X-ray absorption spectroscopy beamline designed for in situ, operando, and time-resolved material characterization using high monochromatic flux and scanning speed. This contribution discusses the technical specifications of the beamline in terms of optics, heat load management, monochromator motion control, and data acquisition and processing. Results of the beamline tests demonstrating the quality of the data obtainable on the instrument, possible energy scanning speeds, as well as long-term beamline stability are shown. The ability to directly control the monochromator trajectory to define the acquisition time for each spectral region is highlighted. Examples of studies performed on the beamline are presented. The paper is concluded with a brief outlook for future developments.
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Affiliation(s)
- Denis Leshchev
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Maksim Rakitin
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Bruno Luvizotto
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Ruslan Kadyrov
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Bruce Ravel
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
- Material Measurement Science Division, Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Klaus Attenkofer
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Eli Stavitski
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
- Correspondence e-mail:
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5
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Sévelin-Radiguet N, Torchio R, Berruyer G, Gonzalez H, Pasternak S, Perrin F, Occelli F, Pépin C, Sollier A, Kraus D, Schuster A, Voigt K, Zhang M, Amouretti A, Boury A, Fiquet G, Guyot F, Harmand M, Borri M, Groves J, Helsby W, Branly S, Norby J, Pascarelli S, Mathon O. Towards a dynamic compression facility at the ESRF. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:167-179. [PMID: 34985434 PMCID: PMC8733990 DOI: 10.1107/s1600577521011632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 11/03/2021] [Indexed: 06/14/2023]
Abstract
Results of the 2018 commissioning and experimental campaigns of the new High Power Laser Facility on the Energy-dispersive X-ray Absorption Spectroscopy (ED-XAS) beamline ID24 at the ESRF are presented. The front-end of the future laser, delivering 15 J in 10 ns, was interfaced to the beamline. Laser-driven dynamic compression experiments were performed on iron oxides, iron alloys and bismuth probed by online time-resolved XAS.
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Affiliation(s)
- Nicolas Sévelin-Radiguet
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Raffaella Torchio
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Gilles Berruyer
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Hervé Gonzalez
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Sébastien Pasternak
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Florian Perrin
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Florent Occelli
- CEA, DAM, DIF, 91297 Arpajon Cedex, France
- Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, 91680 Bruyères-le-Châtel, France
| | - Charles Pépin
- CEA, DAM, DIF, 91297 Arpajon Cedex, France
- Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, 91680 Bruyères-le-Châtel, France
| | - Arnaud Sollier
- CEA, DAM, DIF, 91297 Arpajon Cedex, France
- Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, 91680 Bruyères-le-Châtel, France
| | - Dominik Kraus
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Institut für Physik, Universität Rostock, Albert-Einstein-Strasse 23–24, 18059 Rostock, Germany
| | - Anja Schuster
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01069 Dresden, Germany
| | - Katja Voigt
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01069 Dresden, Germany
| | - Min Zhang
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Institutes of Physical Science and Information Technology, Anhui University, 230601 Hefei, People’s Republic of China
| | - Alexis Amouretti
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590 – Sorbonne Université/CNRS/MNHN/IRD, 75252 Paris, France
| | - Antoine Boury
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590 – Sorbonne Université/CNRS/MNHN/IRD, 75252 Paris, France
| | - Guillaume Fiquet
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590 – Sorbonne Université/CNRS/MNHN/IRD, 75252 Paris, France
| | - François Guyot
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590 – Sorbonne Université/CNRS/MNHN/IRD, 75252 Paris, France
| | - Marion Harmand
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590 – Sorbonne Université/CNRS/MNHN/IRD, 75252 Paris, France
| | | | - Janet Groves
- STFC, Daresbury Laboratory, Warrington, United Kingdom
| | | | - Stéphane Branly
- Amplitude Technologies, 2–4 Rue du Bois Chaland, CE 2926, 91029 Évry, France
| | - James Norby
- Amplitude Technologies, 2–4 Rue du Bois Chaland, CE 2926, 91029 Évry, France
| | - Sakura Pascarelli
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Olivier Mathon
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
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6
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Huang J, Günther B, Achterhold K, Dierolf M, Pfeiffer F. Simultaneous two-color X-ray absorption spectroscopy using Laue crystals at an inverse-compton scattering X-ray facility. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:1874-1880. [PMID: 34738942 PMCID: PMC8570203 DOI: 10.1107/s1600577521009437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
X-ray absorption spectroscopy (XAS) is an element-selective technique that provides electronic and structural information of materials and reveals the essential mechanisms of the reactions involved. However, the technique is typically conducted at synchrotrons and usually only probes one element at a time. In this paper, a simultaneous two-color XAS setup at a laboratory-scale synchrotron facility is proposed based on inverse Compton scattering (ICS) at the Munich Compact Light Source (MuCLS), which is based on inverse Compton scattering (ICS). The setup utilizes two silicon crystals in a Laue geometry. A proof-of-principle experiment is presented where both silver (Ag) and palladium (Pd) K-edge X-ray absorption near-edge structure spectra were simultaneously measured. The simplicity of the setup facilitates its migration to other ICS facilities or maybe to other X-ray sources (e.g. a bending-magnet beamline). Such a setup has the potential to study reaction mechanisms and synergistic effects of chemical systems containing multiple elements of interest, such as a bimetallic catalyst system.
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Affiliation(s)
- Juanjuan Huang
- Chair of Biomedical Physics, Department of Physics, School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, 85748 Garching, Germany
| | - Benedikt Günther
- Chair of Biomedical Physics, Department of Physics, School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, 85748 Garching, Germany
| | - Klaus Achterhold
- Chair of Biomedical Physics, Department of Physics, School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, 85748 Garching, Germany
| | - Martin Dierolf
- Chair of Biomedical Physics, Department of Physics, School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, 85748 Garching, Germany
| | - Franz Pfeiffer
- Chair of Biomedical Physics, Department of Physics, School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, 85748 Garching, Germany
- Department of Diagnostic and Interventional Radiology, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, 81675 München, Germany
- Institute for Advanced Study, Technical University of Munich, 85748 Garching, Germany
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7
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Fehse M, Iadecola A, Simonelli L, Longo A, Stievano L. The rise of X-ray spectroscopies for unveiling the functional mechanisms in batteries. Phys Chem Chem Phys 2021; 23:23445-23465. [PMID: 34664565 DOI: 10.1039/d1cp03263a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Synchrotron-based techniques have been key tools in the discovery, understanding, and development of battery materials. In this review, some of the most suitable X-ray spectroscopy related techniques employed for addressing diverse scientific cases connected to battery science are highlighted. Furthermore, current shortcomings, intrinsic limitations, and ongoing challenges of individual techniques are pointed out, providing an outlook of future trends that are relevant to the battery research community. In particular, the ongoing development of next generation synchrotrons, machine learning algorithms for data analysis and combined theoretical/experimental approaches will enhance the already powerful assets of these advanced spectroscopic methods.
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Affiliation(s)
| | - Antonella Iadecola
- Rééseau sur le Stockage Electrochimique de l'Energie (RS2E), CNRS, Amiens, France
| | | | - Alessandro Longo
- European Synchrotron Radiation Facility, Grenoble, France.,Istituto per lo Studio dei Materiali Nanostrutturati, ISMN-CNR UOS di Palermo, Palermo, Italy
| | - Lorenzo Stievano
- Rééseau sur le Stockage Electrochimique de l'Energie (RS2E), CNRS, Amiens, France.,ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
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8
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N'Diaye A, Bordage A, Nataf L, Baudelet F, Moreno T, Bleuzen A. A cookbook for the investigation of coordination polymers by transition metal K-edge XMCD. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:1127-1136. [PMID: 34212876 DOI: 10.1107/s1600577521004884] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 05/08/2021] [Indexed: 06/13/2023]
Abstract
In order to disentangle the physical effects at the origin of transition metal K-edge X-ray magnetic circular dichroism (XMCD) in coordination polymers and quantify small structural distortions from the intensity of these signals, a systematic investigation of Prussian blue analogs as model compounds is being conducted. Here the effects of the temperature and of the external magnetic field are tackled; none of these external parameters modify the shape of the XMCD signal but they both critically modify its intensity. The optimized experimental conditions, as well as a reliable and robust normalization procedure, could thus be determined for the study of the intrinsic parameters. Through an extended discussion on measurements on other XMCD-dedicated beamlines and for other coordination compounds, we finally provide new transition metal K-edge XMCD users with useful information to initiate and successfully carry out their projects.
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Affiliation(s)
- Adama N'Diaye
- ICMMO, Université Paris Saclay, CNRS, 15 rue Georges Clémenceau, 91405 Orsay, France
| | - Amélie Bordage
- ICMMO, Université Paris Saclay, CNRS, 15 rue Georges Clémenceau, 91405 Orsay, France
| | - Lucie Nataf
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - François Baudelet
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - Thierry Moreno
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - Anne Bleuzen
- ICMMO, Université Paris Saclay, CNRS, 15 rue Georges Clémenceau, 91405 Orsay, France
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9
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Cerantola V, Rosa AD, Konôpková Z, Torchio R, Brambrink E, Rack A, Zastrau U, Pascarelli S. New frontiers in extreme conditions science at synchrotrons and free electron lasers. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:274003. [PMID: 33930892 DOI: 10.1088/1361-648x/abfd50] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/30/2021] [Indexed: 06/12/2023]
Abstract
Synchrotrons and free electron lasers are unique facilities to probe the atomic structure and electronic properties of matter at extreme thermodynamical conditions. In this context, 'matter at extreme pressures and temperatures' was one of the science drivers for the construction of low emittance 4th generation synchrotron sources such as the Extremely Brilliant Source of the European Synchrotron Radiation Facility and hard x-ray free electron lasers, such as the European x-ray free electron laser. These new user facilities combine static high pressure and dynamic shock compression experiments to outstanding high brilliance and submicron beams. This combination not only increases the data-quality but also enlarges tremendously the accessible pressure, temperature and density space. At the same time, the large spectrum of available complementary x-ray diagnostics for static and shock compression studies opens unprecedented insights into the state of matter at extremes. The article aims at highlighting a new horizon of scientific opportunities based on the synergy between extremely brilliant synchrotrons and hard x-ray free electron lasers.
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Affiliation(s)
- Valerio Cerantola
- European X-ray Free-Electron Laser, Holzkoppel 4, 22869 Schenefeld, Germany
| | | | - Zuzana Konôpková
- European X-ray Free-Electron Laser, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Raffaella Torchio
- ESRF-The European Synchrotron, 71 Avenue des Martyrs, Grenoble 38000, France
| | - Erik Brambrink
- European X-ray Free-Electron Laser, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Alexander Rack
- ESRF-The European Synchrotron, 71 Avenue des Martyrs, Grenoble 38000, France
| | - Ulf Zastrau
- European X-ray Free-Electron Laser, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Sakura Pascarelli
- European X-ray Free-Electron Laser, Holzkoppel 4, 22869 Schenefeld, Germany
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10
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Pao CW, Chen JL, Lee JF, Tsai MC, Huang CY, Chiu CC, Chang CY, Chiang LC, Huang YS. The new X-ray absorption fine-structure beamline with sub-second time resolution at the Taiwan Photon Source. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:930-938. [PMID: 33950001 PMCID: PMC8127382 DOI: 10.1107/s1600577521001740] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 02/12/2021] [Indexed: 05/31/2023]
Abstract
The new TPS 44A beamline at the Taiwan Photon Source, located at the National Synchrotron Radiation Research Center, is presented. This beamline is equipped with a new quick-scanning monochromator (Q-Mono), which can provide both conventional step-by-step scans (s-scans) and on-the-fly scans (q-scans) for X-ray absorption fine-structure (XAFS) spectroscopy experiments, including X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine-structure (EXAFS) spectral measurements. Ti and Te K-edge XAFS spectra were used to demonstrate the capability of collecting spectra at the limits of the working energy range. The Ni and Cu K-edge XAFS spectra for a Cu-doped Pt/Ni nanocomposite were acquired to test the performance of the newly commissioned beamline. Pt L3- and Ru K-edge quick-scanning XAFS (QXAFS) spectra for standard Pt and Ru foils, respectively, revealed the stability of the q-scan technique. The results also demonstrated the beamline's ability to collect XAFS spectra on a sub-second timescale. Furthermore, a Zn(s)|Zn2+(aq)|Cu(s) system was tested to indicate that the states of the Zn electrode could be observed in real time for charging and discharging conditions using an in situ/operando setup combined with QXAFS measurements.
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Affiliation(s)
- Chih-Wen Pao
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Jeng-Lung Chen
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Jyh-Fu Lee
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Meng-Che Tsai
- NanoElectroChemistry Lab, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Chi-Yi Huang
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Chao-Chih Chiu
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Chao-Yu Chang
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Liang-Chih Chiang
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Yu-Shan Huang
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
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11
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A Review of the Melting Curves of Transition Metals at High Pressures Using Static Compression Techniques. CRYSTALS 2021. [DOI: 10.3390/cryst11040416] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The accurate determination of melting curves for transition metals is an intense topic within high pressure research, both because of the technical challenges included as well as the controversial data obtained from various experiments. This review presents the main static techniques that are used for melting studies, with a strong focus on the diamond anvil cell; it also explores the state of the art of melting detection methods and analyzes the major reasons for discrepancies in the determination of the melting curves of transition metals. The physics of the melting transition is also discussed.
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12
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Sample Environment for Operando Hard X-ray Tomography—An Enabling Technology for Multimodal Characterization in Heterogeneous Catalysis. Catalysts 2021. [DOI: 10.3390/catal11040459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Structure–activity relations in heterogeneous catalysis can be revealed through in situ and operando measurements of catalysts in their active state. While hard X-ray tomography is an ideal method for non-invasive, multimodal 3D structural characterization on the micron to nm scale, performing tomography under controlled gas and temperature conditions is challenging. Here, we present a flexible sample environment for operando hard X-ray tomography at synchrotron radiation sources. The setup features are discussed, with demonstrations of operando powder X-ray diffraction tomography (XRD-CT) and energy-dispersive tomographic X-ray absorption spectroscopy (ED-XAS-CT). Catalysts for CO2 methanation and partial oxidation of methane are shown as case studies. The setup can be adapted for different hard X-ray microscopy, spectroscopy, or scattering synchrotron radiation beamlines, is compatible with absorption, diffraction, fluorescence, and phase-contrast imaging, and can operate with scanning focused beam or full-field acquisition mode. We present an accessible methodology for operando hard X-ray tomography studies, which offer a unique source of 3D spatially resolved characterization data unavailable to contemporary methods.
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Timoshenko J, Roldan Cuenya B. In Situ/ Operando Electrocatalyst Characterization by X-ray Absorption Spectroscopy. Chem Rev 2021; 121:882-961. [PMID: 32986414 PMCID: PMC7844833 DOI: 10.1021/acs.chemrev.0c00396] [Citation(s) in RCA: 189] [Impact Index Per Article: 63.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Indexed: 12/18/2022]
Abstract
During the last decades, X-ray absorption spectroscopy (XAS) has become an indispensable method for probing the structure and composition of heterogeneous catalysts, revealing the nature of the active sites and establishing links between structural motifs in a catalyst, local electronic structure, and catalytic properties. Here we discuss the fundamental principles of the XAS method and describe the progress in the instrumentation and data analysis approaches undertaken for deciphering X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra. Recent usages of XAS in the field of heterogeneous catalysis, with emphasis on examples concerning electrocatalysis, will be presented. The latter is a rapidly developing field with immense industrial applications but also unique challenges in terms of the experimental characterization restrictions and advanced modeling approaches required. This review will highlight the new insight that can be gained with XAS on complex real-world electrocatalysts including their working mechanisms and the dynamic processes taking place in the course of a chemical reaction. More specifically, we will discuss applications of in situ and operando XAS to probe the catalyst's interactions with the environment (support, electrolyte, ligands, adsorbates, reaction products, and intermediates) and its structural, chemical, and electronic transformations as it adapts to the reaction conditions.
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Affiliation(s)
- Janis Timoshenko
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
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14
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Qi P, Samadi N, Chapman D. X-ray Spectral Imaging Program: XSIP. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:1734-1740. [PMID: 33147202 PMCID: PMC7642969 DOI: 10.1107/s1600577520010838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
Spectral K-edge subtraction imaging and wide-field energy-dispersive X-ray absorption spectroscopy imaging are novel, related, synchrotron imaging techniques for element absorption contrast imaging and element speciation imaging, respectively. These two techniques serve different goals but share the same X-ray optics principles with a bent Laue type monochromator and the same data processing algorithms. As there is a growing interest to implement these novel techniques in synchrotron facilities, Python-based software has been developed to automate the data processing procedures for both techniques. In this paper, the concept of the essential data processing algorithms are explained, the workflow of the software is described, and the main features and some related utilities are introduced.
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Affiliation(s)
- Peng Qi
- Division of Biomedical Engineering, University of Saskatchewan, Saskatoon, Canada
| | - Nazanin Samadi
- Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Dean Chapman
- Anatomy, Physiology and Pharmacology, University of Saskatchewan, Saskatoon, Canada
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15
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Spectral Decomposition of X-ray Absorption Spectroscopy Datasets: Methods and Applications. CRYSTALS 2020. [DOI: 10.3390/cryst10080664] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
X-ray absorption spectroscopy (XAS) today represents a widespread and powerful technique, able to monitor complex systems under in situ and operando conditions, while external variables, such us sampling time, sample temperature or even beam position over the analysed sample, are varied. X-ray absorption spectroscopy is an element-selective but bulk-averaging technique. Each measured XAS spectrum can be seen as an average signal arising from all the absorber-containing species/configurations present in the sample under study. The acquired XAS data are thus represented by a spectroscopic mixture composed of superimposed spectral profiles associated to well-defined components, characterised by concentration values evolving in the course of the experiment. The decomposition of an experimental XAS dataset in a set of pure spectral and concentration values is a typical example of an inverse problem and it goes, usually, under the name of multivariate curve resolution (MCR). In the present work, we present an overview on the major techniques developed to realize the MCR decomposition together with a selection of related results, with an emphasis on applications in catalysis. Therein, we will highlight the great potential of these methods which are imposing as an essential tool for quantitative analysis of large XAS datasets as well as the directions for further development in synergy with the continuous instrumental progresses at synchrotron sources.
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16
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Das P, Klug JA, Sinclair N, Wang X, Toyoda Y, Li Y, Williams B, Schuman A, Zhang J, Turneaure SJ. Single-pulse (100 ps) extended x-ray absorption fine structure capability at the Dynamic Compression Sector. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:085115. [PMID: 32872941 DOI: 10.1063/5.0003427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 08/02/2020] [Indexed: 06/11/2023]
Abstract
Determining real-time changes in the local atomistic order is important for a mechanistic understanding of shock wave induced structural and chemical changes. However, the single event and short duration (nanosecond times) nature of shock experiments pose challenges in obtaining Extended X-ray Absorption Fine Structure (EXAFS) measurements-typically used for monitoring local order changes. Here, we report on a new single pulse (∼100 ps duration) transmission geometry EXAFS capability for use in laser shock-compression experiments at the Dynamic Compression Sector (DCS), Advanced Photon Source. We used a flat plate of highly oriented pyrolytic graphite (HOPG) as the spectrometer element to energy disperse x rays transmitted through the sample. It provided high efficiency with ∼15% of the x rays incident on the HOPG reaching an x-ray area detector with high quantum efficiency. This combination resulted in a good signal-to-noise ratio (∼103), an energy resolution of ∼10 eV at 10 keV, EXAFS spectra covering 100 s of eV, and a good pulse to pulse reproducibility of our single pulse measurements. Ambient EXAFS spectra for Cu and Au are compared to the reference spectra, validating our measurement system. Comparison of single pulse EXAFS results for ambient and laser shocked Ge(100) shows large changes in the local structure of the short lived state of shocked Ge. The current DCS EXAFS capability can be used to perform single pulse measurements in laser shocked materials from ∼9 keV to 13 keV. These EXAFS developments will be available to all users of the DCS.
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Affiliation(s)
- Pinaki Das
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Jeffrey A Klug
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Nicholas Sinclair
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Xiaoming Wang
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Yoshimasa Toyoda
- Institute for Shock Physics, Washington State University, Pullman, Washington 99164, USA
| | - Yuelin Li
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Brendan Williams
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Adam Schuman
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Jun Zhang
- Dynamic Compression Sector, Institute for Shock Physics, Washington State University, Argonne, Illinois 60439, USA
| | - Stefan J Turneaure
- Institute for Shock Physics, Washington State University, Pullman, Washington 99164, USA
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17
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Reich S, Göttlicher J, Ziefuss A, Streubel R, Letzel A, Menzel A, Mathon O, Pascarelli S, Baumbach T, Zuber M, Gökce B, Barcikowski S, Plech A. In situ speciation and spatial mapping of Zn products during pulsed laser ablation in liquids (PLAL) by combined synchrotron methods. NANOSCALE 2020; 12:14011-14020. [PMID: 32579650 DOI: 10.1039/d0nr01500h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Pulsed laser ablation in liquids is a hierarchical multi-step process to produce pure inorganic nanoparticle colloids. Controlling this process is hampered by the partial understanding of individual steps and structure formation. In situ X-ray methods are employed to resolve macroscopic dynamics of nanosecond PLAL as well to analyse the distribution and speciation of ablated species with a microsecond time resolution. High time resolution can be achieved by synchrotron-based methods that are capable of 'single-shot' acquisition. X-ray multicontrast imaging by a Shack-Hartmann setup (XHI) and small angle X-ray scattering (SAXS) resolve evolving nanoparticles inside the transient cavitation bubble, while X-ray absorption spectroscopy in dispersive mode opens access to the total material yield and the chemical state of the ejecta. It is confirmed that during ablation nanoparticles are produced directly as well as reactive material is detected, which is identified in the early stage as Zn atoms. Nanoparticles within the cavitation bubble show a metal signature, which prevails for milliseconds, before gradual oxidation sets in. Ablation is described by a phase explosion of the target coexisting with full evaporation. Oxidation occurs only as a later step to already formed nanoparticles.
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Affiliation(s)
- Stefan Reich
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany.
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18
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Lahiri D, Dwivedi A, Vasanthi R, Jha SN, Garg N. First high-pressure XAFS results at the bending-magnet-based energy-dispersive XAFS beamline BL-8 at the Indus-2 synchrotron facility. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:988-998. [PMID: 33566008 DOI: 10.1107/s1600577520006098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/04/2020] [Indexed: 06/12/2023]
Abstract
The static focusing optics of the existing energy-dispersive XAFS beamline BL-8 have been advantageously exploited to initiate diamond anvil cell based high-pressure XANES experiments at the Indus-2 synchrotron facility, India. In the framework of the limited photon statistics with the 2.5 GeV bending-magnet source, limited focusing optics and 4 mm-thick diamond windows of the sample cell, a (non-trivial) beamline alignment method for maximizing photon statistics at the sample position has been designed. Key strategies include the selection of a high X-ray energy edge, the truncation of the smallest achievable focal spot size to target size with a slit and optimization of the horizontal slit position for transmission of the desired energy band. A motor-scanning program for precise sample centering has been developed. These details are presented with rationalization for every step. With these strategies, Nb K-edge XANES spectra for Nb2O5 under high pressure (0-16.9 GPa) have been generated, reproducing the reported spectra for Nb2O5 under ambient conditions and high pressure. These first HPXANES results are reported in this paper. The scope of extending good data quality to the EXAFS range in the future is addressed. This work should inspire and guide future high-pressure XAFS experiments with comparable infrastructure.
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Affiliation(s)
- Debdutta Lahiri
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ashutosh Dwivedi
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - R Vasanthi
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S N Jha
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Nandini Garg
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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19
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Tavani F, Martini A, Capocasa G, Di Stefano S, Lanzalunga O, D'Angelo P. Direct Mechanistic Evidence for a Nonheme Complex Reaction through a Multivariate XAS Analysis. Inorg Chem 2020; 59:9979-9989. [PMID: 32598841 PMCID: PMC8008396 DOI: 10.1021/acs.inorgchem.0c01132] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
![]()
In
this work, we propose a method to directly determine the mechanism
of the reaction between the nonheme complex FeII(tris(2-pyridylmethyl)amine)
([FeII(TPA)(CH3CN)2]2+) and peracetic acid (AcOOH) in CH3CN, working at room
temperature. A multivariate analysis is applied to the time-resolved
coupled energy-dispersive X-ray absorption spectroscopy (EDXAS) reaction
data, from which a set of spectral and concentration profiles for
the reaction key species is derived. These “pure” extracted
EDXAS spectra are then quantitatively characterized by full multiple
scattering (MS) calculations. As a result, structural information
for the elusive reaction intermediates [FeIII(TPA)(κ2-OOAc)]2+ and [FeIV(TPA)(O)(X)]+/2+ is obtained, and it is suggested that X = AcO– in opposition to X = CH3CN. The employed strategy is
promising both for the spectroscopic characterization of reaction
intermediates that are labile or silent to the conventional spectroscopic
techniques, as well as for the mechanistic understanding of complex
redox reactions involving organic substrates. A combined multivariate and theoretical XAS analysis was
proven to be a powerful method to obtain direct evidence for the mechanism
of the reaction between the nonheme complex FeII(tris(2-pyridymethyl)amine)
([FeII(TPA)(CH3CN)2]2+) and peroxyacetic acid. This approach allowed to determine the time
evolution of the concentration profiles for all reaction intermediates
and to quantitatively characterize their structures, suggesting the
sixth coordinating ligand of the nonheme oxo complex [FeIV(TPA)(O)(X)]+/2+ is X = AcO− in
opposition to X = CH3CN.
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Affiliation(s)
- Francesco Tavani
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Andrea Martini
- Dipartimento di Chimica, Università degli Studi di Torino, Via P. Giuria 7, 10125 Torino, Italy.,The Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, 344090 Rostov-on-Don, Russia
| | - Giorgio Capocasa
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Stefano Di Stefano
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Paola D'Angelo
- Dipartimento di Chimica, Università di Roma "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
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20
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A Practical Review of the Laser-Heated Diamond Anvil Cell for University Laboratories and Synchrotron Applications. CRYSTALS 2020. [DOI: 10.3390/cryst10060459] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In the past couple of decades, the laser-heated diamond anvil cell (combined with in situ techniques) has become an extensively used tool for studying pressure-temperature-induced evolution of various physical (and chemical) properties of materials. In this review, the general challenges associated with the use of the laser-heated diamond anvil cells are discussed together with the recent progress in the use of this tool combined with synchrotron X-ray diffraction and absorption spectroscopy.
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21
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The current status of time-resolved XAS beamline at SLRI and application on in situ experiments. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108750] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Wide field imaging energy dispersive X-ray absorption spectroscopy. Sci Rep 2019; 9:17734. [PMID: 31776410 PMCID: PMC6881466 DOI: 10.1038/s41598-019-54287-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/01/2019] [Indexed: 11/08/2022] Open
Abstract
A new energy dispersive X-ray absorption spectroscopy (EDXAS) method is presented for simultaneous wide-field imaging and transmission X-ray absorption spectroscopy (XAS) to enable rapid imaging and speciation of elements. Based on spectral K-Edge Subtraction imaging (sKES), a bent Laue imaging system diffracting in the vertical plane was developed on a bend magnet beamline for selenium speciation. The high flux and small vertical focus, forming a wide horizontal line beam for projection imaging and computed tomography applications, is achieved by precise matching of lattice plane orientation and crystal surface (asymmetry angle). The condition generating a small vertical focus for imaging also provides good energy dispersion. Details for achieving sufficient energy and spatial resolution are demonstrated for both full field imaging and computed tomography in quantifying selenium chemical species. While this system has lower sensitivity as it uses transmission and may lack the flux and spatial resolution of a dedicated focused beamline system, it has significant potential in rapid screening of heterogeneous biomedical or environmental systems to correlate metal speciation with function.
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23
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Meira DM, Monte M, Fernández-García M, Meunier F, Mathon O, Pascarelli S, Agostini G. A flexible cell for in situ combined XAS-DRIFTS-MS experiments. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:801-810. [PMID: 31074445 DOI: 10.1107/s1600577519003035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/27/2019] [Indexed: 06/09/2023]
Abstract
A new cell for in situ combined X-ray absorption, diffuse reflectance IR Fourier transform and mass spectroscopies (XAS-DRIFTS-MS) is presented. The cell stands out among others for its achievements and flexibility. It is possible to perform XAS measurements in transmission or fluorescence modes, and the cell is compatible with external devices like UV-light and Raman probes. It includes different sample holders compatible with the different XAS detection modes, different sample forms (free powder or self-supporting pellet) and different sample loading/total absorption. Additionally, it has a small dead volume and can operate over a wide range of temperature (up to 600°C) and pressure (up to 5 bar). Three research examples will be shown to illustrate the versatility of the cell. This cell covers a wider range of applications than any other cell currently known for this type of study.
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Affiliation(s)
- Debora M Meira
- European Synchrotron Radiation Facility (ESRF), Avenue des Martyrs 71, 38000 Grenoble, France
| | - Manuel Monte
- European Synchrotron Radiation Facility (ESRF), Avenue des Martyrs 71, 38000 Grenoble, France
| | - Marcos Fernández-García
- Instituto de Catálisis y Petroleoquimica (ICP-CSIC), C/Marie Curie 2, Cantoblanco, 28049 Madrid, Spain
| | - Frederic Meunier
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon, Université de Lyon 1, CNRS, Avenue Albert Einstein 2, 69626 Villeurbanne, France
| | - Olivier Mathon
- European Synchrotron Radiation Facility (ESRF), Avenue des Martyrs 71, 38000 Grenoble, France
| | - Sakura Pascarelli
- European Synchrotron Radiation Facility (ESRF), Avenue des Martyrs 71, 38000 Grenoble, France
| | - Giovanni Agostini
- European Synchrotron Radiation Facility (ESRF), Avenue des Martyrs 71, 38000 Grenoble, France
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24
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Gorbunov DI, Strohm C, Henriques MS, van der Linden P, Pedersen B, Mushnikov NV, Rosenfeld EV, Petříček V, Mathon O, Wosnitza J, Andreev AV. Microscopic Nature of the First-Order Field-Induced Phase Transition in the Strongly Anisotropic Ferrimagnet HoFe_{5}Al_{7}. PHYSICAL REVIEW LETTERS 2019; 122:127205. [PMID: 30978077 DOI: 10.1103/physrevlett.122.127205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/08/2018] [Indexed: 06/09/2023]
Abstract
We report on x-ray magnetic circular dichroism experiments in pulsed fields up to 30 T to follow the rotations of individual magnetic moments through the field-induced phase transition in the ferrimagnet HoFe_{5}Al_{7}. Near the ground state, we observe simultaneous stepwise rotations of the Ho and Fe moments and explain them using a two-sublattice model for an anisotropic ferrimagnet with weak intersublattice exchange interactions. Near the compensation point, we find two phase transitions. The additional magnetization jump reflects the fact that the Ho moment is no longer rigid as the applied field acts against the intersublattice exchange field.
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Affiliation(s)
- D I Gorbunov
- Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - C Strohm
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - M S Henriques
- Institut Laue Langevin, 71 Avenue des Martyrs, F-38042 Grenoble, France
- Institute of Physics, Academy of Sciences, Na Slovance 2, 182 21 Prague, Czech Republic
| | - P van der Linden
- European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble, France
| | - B Pedersen
- Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstrasse 1, 85748 Garching, Germany
| | - N V Mushnikov
- Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Kovalevskaya 18, 620990 Ekaterinburg, Russia
| | - E V Rosenfeld
- Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Kovalevskaya 18, 620990 Ekaterinburg, Russia
| | - V Petříček
- Institute of Physics, Academy of Sciences, Na Slovance 2, 182 21 Prague, Czech Republic
| | - O Mathon
- European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble, France
| | - J Wosnitza
- Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Institut für Festkörperphysik, TU Dresden, D-01062 Dresden, Germany
| | - A V Andreev
- Institute of Physics, Academy of Sciences, Na Slovance 2, 182 21 Prague, Czech Republic
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25
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Strohm C, van der Linden P, Mathon O, Pascarelli S. Simultaneous Observation of the Er- and Fe-Sublattice Magnetization of Ferrimagnetic Er_{3}Fe_{5}O_{12} in High Magnetic Fields Using X-Ray Magnetic Circular Dichroism at the Er L_{2,3} Edges. PHYSICAL REVIEW LETTERS 2019; 122:127204. [PMID: 30978088 DOI: 10.1103/physrevlett.122.127204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/03/2018] [Indexed: 06/09/2023]
Abstract
X-ray magnetic circular dichroism (XMCD) studies at the Er L_{2,3} edges of Er_{3}Fe_{5}O_{12} exhibit a change of the spectral shape as a function of temperature and magnetic field. Using singular value decomposition, this variation is understood as a linear combination of two components. The dominating component is associated with the Er magnetization, while the second contribution is identified as an induced signal from the Fe sites. XMCD at either of the L edges in Er_{3}Fe_{5}O_{12} provides information on the net magnetization of both sublattices. Their evolution in fields up to 30 T reveals details of the ferrimagnetic interactions on two very different scales.
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Affiliation(s)
- C Strohm
- Deutsches Elektronen Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany
| | - P van der Linden
- European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble, France
| | - O Mathon
- European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble, France
| | - S Pascarelli
- European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble, France
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26
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Boulard E, Harmand M, Guyot F, Lelong G, Morard G, Cabaret D, Boccato S, Rosa AD, Briggs R, Pascarelli S, Fiquet G. Ferrous Iron Under Oxygen-Rich Conditions in the Deep Mantle. GEOPHYSICAL RESEARCH LETTERS 2019; 46:1348-1356. [PMID: 31007309 PMCID: PMC6472328 DOI: 10.1029/2019gl081922] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 01/20/2019] [Indexed: 05/31/2023]
Abstract
Recent experiments have demonstrated the existence of previously unknown iron oxides at high pressure and temperature including newly discovered pyrite-type FeO2 and FeO2Hx phases stable at deep terrestrial lower mantle pressures and temperatures. In the present study, we probed the iron oxidation state in high-pressure transformation products of Fe3+OOH goethite by in situ X-ray absorption spectroscopy in laser-heated diamond-anvil cell. At pressures and temperatures of ~91 GPa and 1,500-2,350 K, respectively, that is, in the previously reported stability field of FeO2Hx, a measured shift of -3.3 ± 0.1 eV of the Fe K-edge demonstrates that iron has turned from Fe3+ to Fe2+. We interpret this reductive valence change of iron by a concomitant oxidation of oxygen atoms from O2- to O-, in agreement with previous suggestions based on the structures of pyrite-type FeO2 and FeO2Hx phases. Such peculiar chemistry could drastically change our view of crystal chemistry in deep planetary interiors.
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Affiliation(s)
- E. Boulard
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IRDInstitut de Minéralogie, Physique des Matériaux et Cosmochimie ‐ IMPMC4 Place Jussieu75005ParisFrance
| | - M. Harmand
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IRDInstitut de Minéralogie, Physique des Matériaux et Cosmochimie ‐ IMPMC4 Place Jussieu75005ParisFrance
| | - F. Guyot
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IRDInstitut de Minéralogie, Physique des Matériaux et Cosmochimie ‐ IMPMC4 Place Jussieu75005ParisFrance
| | - G. Lelong
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IRDInstitut de Minéralogie, Physique des Matériaux et Cosmochimie ‐ IMPMC4 Place Jussieu75005ParisFrance
| | - G. Morard
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IRDInstitut de Minéralogie, Physique des Matériaux et Cosmochimie ‐ IMPMC4 Place Jussieu75005ParisFrance
| | - D. Cabaret
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IRDInstitut de Minéralogie, Physique des Matériaux et Cosmochimie ‐ IMPMC4 Place Jussieu75005ParisFrance
| | - S. Boccato
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IRDInstitut de Minéralogie, Physique des Matériaux et Cosmochimie ‐ IMPMC4 Place Jussieu75005ParisFrance
- European Synchrotron Radiation FacilityGrenobleFrance
| | - A. D. Rosa
- European Synchrotron Radiation FacilityGrenobleFrance
| | - R. Briggs
- European Synchrotron Radiation FacilityGrenobleFrance
- Now at Lawrence Livermore National LaboratoryLivermoreCaliforniaUSA
| | - S. Pascarelli
- European Synchrotron Radiation FacilityGrenobleFrance
| | - G. Fiquet
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IRDInstitut de Minéralogie, Physique des Matériaux et Cosmochimie ‐ IMPMC4 Place Jussieu75005ParisFrance
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Agostini G, Meira D, Monte M, Vitoux H, Iglesias-Juez A, Fernández-García M, Mathon O, Meunier F, Berruyer G, Perrin F, Pasternak S, Mairs T, Pascarelli S, Gorges B. XAS/DRIFTS/MS spectroscopy for time-resolved operando investigations at high temperature. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:1745-1752. [PMID: 30407185 PMCID: PMC6544193 DOI: 10.1107/s160057751801305x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 09/14/2018] [Indexed: 05/28/2023]
Abstract
The combination of complementary techniques in the characterization of catalysts under working conditions is a very powerful tool for an accurate and in-depth comprehension of the system investigated. In particular, X-ray absorption spectroscopy (XAS) coupled with diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and mass spectroscopy (MS) is a powerful combination since XAS characterizes the main elements of the catalytic system (selecting the absorption edge) and DRIFTS monitors surface adsorbates while MS enables product identification and quantification. In the present manuscript, a new reactor cell and an experimental setup optimized to perform time-resolved experiments on heterogeneous catalysts under working conditions are reported. A key feature of this setup is the possibility to work at high temperature and pressure, with a small cell dead volume. To demonstrate these capabilities, performance tests with and without X-rays are performed. The effective temperature at the sample surface, the speed to purge the gas volume inside the cell and catalytic activity have been evaluated to demonstrate the reliability and usefulness of the cell. The setup capability of combining XAS, DRIFTS and MS spectroscopies is demonstrated in a time-resolved experiment, following the reduction of NO by Rh nanoparticles supported on alumina.
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Affiliation(s)
- G. Agostini
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - D. Meira
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - M. Monte
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - H. Vitoux
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - A. Iglesias-Juez
- Instituto de Catalisis y Petroleoquimica (ICP-CSIC), Marie Curie 2, Cantoblanco, 28049 Madrid, Spain
| | - M. Fernández-García
- Instituto de Catalisis y Petroleoquimica (ICP-CSIC), Marie Curie 2, Cantoblanco, 28049 Madrid, Spain
| | - O. Mathon
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - F. Meunier
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, 2 Avenue Albert Einstein, 69626 Villeurbanne, France
| | - G. Berruyer
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - F. Perrin
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - S. Pasternak
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - T. Mairs
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - S. Pascarelli
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - B. Gorges
- ERSF – European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
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29
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Determining Cu–Speciation in the Cu–CHA Zeolite Catalyst: The Potential of Multivariate Curve Resolution Analysis of In Situ XAS Data. Top Catal 2018. [DOI: 10.1007/s11244-018-1036-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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30
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Guda AA, Bugaev AL, Kopelent R, Braglia L, Soldatov AV, Nachtegaal M, Safonova OV, Smolentsev G. Fluorescence-detected XAS with sub-second time resolution reveals new details about the redox activity of Pt/CeO 2 catalyst. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:989-997. [PMID: 29979160 PMCID: PMC6038606 DOI: 10.1107/s1600577518005325] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 04/04/2018] [Indexed: 06/02/2023]
Abstract
A setup for fluorescence-detected X-ray absorption spectroscopy (XAS) with sub-second time resolution has been developed. This technique allows chemical speciation of low-concentrated materials embedded in highly absorbing matrices, which cannot be studied using transmission XAS. Using this setup, the reactivity of 1.5 wt% Pt/CeO2 catalyst was studied with 100 ms resolution during periodic cycling in CO- and oxygen-containing atmospheres in a plug-flow reactor. Measurements were performed at the Pt L3- and Ce L3-edges. The reactivity of platinum and cerium demonstrated a strong correlation. The oxidation of the catalyst starts on the ceria support helping the oxidation of platinum nanoparticles. The new time-resolved XAS setup can be applied to various systems, capable of reproducible cycling between different states triggered by gas atmosphere, light, temperature, etc. It opens up new perspectives for mechanistic studies on automotive catalysts, selective oxidation catalysts and photocatalysts.
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Affiliation(s)
- Alexander A. Guda
- The Smart Materials Research Center, Southern Federal University, Sladkova 174/28, Rostov-on-Don 344090, Russian Federation
| | - Aram L. Bugaev
- The Smart Materials Research Center, Southern Federal University, Sladkova 174/28, Rostov-on-Don 344090, Russian Federation
- Department of Chemistry, NIS and CrisDi Interdepartmental Centres, asn INST Reference Center, University of Turin, Via P. Giuria 7, Turin 10125, Italy
| | | | - Luca Braglia
- The Smart Materials Research Center, Southern Federal University, Sladkova 174/28, Rostov-on-Don 344090, Russian Federation
- Department of Chemistry, NIS and CrisDi Interdepartmental Centres, asn INST Reference Center, University of Turin, Via P. Giuria 7, Turin 10125, Italy
| | - Alexander V. Soldatov
- The Smart Materials Research Center, Southern Federal University, Sladkova 174/28, Rostov-on-Don 344090, Russian Federation
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31
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Abe H, Aquilanti G, Boada R, Bunker B, Glatzel P, Nachtegaal M, Pascarelli S. Improving the quality of XAFS data. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:972-980. [PMID: 29979158 PMCID: PMC6038603 DOI: 10.1107/s1600577518006021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/18/2018] [Indexed: 05/26/2023]
Abstract
Following the Q2XAFS Workshop and Satellite to IUCr Congress 2017 on `Data Acquisition, Treatment, Storage - quality assurance in XAFS spectroscopy', a summary is given of the discussion on different aspects of a XAFS experiment that affect data quality. Some pertinent problems ranging from sources and minimization of noise to harmonic contamination and uncompensated monochromator glitches were addressed. Also, an overview is given of the major limitations and pitfalls of a selection of related methods, such as photon-out spectroscopies and energy-dispersive XAFS, and of increasingly common applications, namely studies at high pressure, and time-resolved investigations of catalysts in operando. Advice on how to avoid or deal with these problems and a few good practice recommendations are reported, including how to correctly report results.
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Affiliation(s)
- Hitoshi Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba, Japan
| | | | | | | | - Pieter Glatzel
- European Synchrotron Radiation Facility, Grenoble, France
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32
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Nilsson J, Carlsson PA, Martin NM, Velin P, Meira DM, Grönbeck H, Skoglundh M. Oxygen step-response experiments for methane oxidation over Pd/Al2O3: An in situ XAFS study. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2018.02.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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33
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Structural Kinetics of Cathode Events on Polymer Electrolyte Fuel Cell Catalysts Studied by Operando Time-Resolved XAFS. Catal Letters 2018. [DOI: 10.1007/s10562-018-2383-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kantor I, Marini C, Mathon O, Pascarelli S. A laser heating facility for energy-dispersive X-ray absorption spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:013111. [PMID: 29390671 DOI: 10.1063/1.5010345] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A double-sided laser heating setup for diamond anvil cells installed on the ID24 beamline of the ESRF is presented here. The setup geometry is specially adopted for the needs of energy-dispersive X-ray absorption spectroscopic (XAS) studies of materials under extreme pressure and temperature conditions. We illustrate the performance of the facility with a study on metallic nickel at 60 GPa. The XAS data provide the temperature of the melting onset and quantitative information on the structural parameters of the first coordination shell in the hot solid up to melting.
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Affiliation(s)
- I Kantor
- ESRF-The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
| | - C Marini
- ESRF-The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
| | - O Mathon
- ESRF-The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
| | - S Pascarelli
- ESRF-The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
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35
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Sanchez DF, Simionovici AS, Lemelle L, Cuartero V, Mathon O, Pascarelli S, Bonnin A, Shapiro R, Konhauser K, Grolimund D, Bleuet P. 2D/3D Microanalysis by Energy Dispersive X-ray Absorption Spectroscopy Tomography. Sci Rep 2017; 7:16453. [PMID: 29184091 PMCID: PMC5705590 DOI: 10.1038/s41598-017-16345-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 11/10/2017] [Indexed: 11/18/2022] Open
Abstract
X-ray spectroscopic techniques have proven to be particularly useful in elucidating the molecular and electronic structural information of chemically heterogeneous and complex micro- and nano-structured materials. However, spatially resolved chemical characterization at the micrometre scale remains a challenge. Here, we report the novel hyperspectral technique of micro Energy Dispersive X-ray Absorption Spectroscopy (μED-XAS) tomography which can resolve in both 2D and 3D the spatial distribution of chemical species through the reconstruction of XANES spectra. To document the capability of the technique in resolving chemical species, we first analyse a sample containing 2-30 μm grains of various ferrous- and ferric-iron containing minerals, including hypersthene, magnetite and hematite, distributed in a light matrix of a resin. We accurately obtain the XANES spectra at the Fe K-edge of these four standards, with spatial resolution of 3 μm. Subsequently, a sample of ~1.9 billion-year-old microfossil from the Gunflint Formation in Canada is investigated, and for the first time ever, we are able to locally identify the oxidation state of iron compounds encrusting the 5 to 10 μm microfossils. Our results highlight the potential for attaining new insights into Precambrian ecosystems and the composition of Earth's earliest life forms.
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Affiliation(s)
| | - Alexandre S Simionovici
- ISTerre, UGA, CNRS, Observatoire des Sciences de l'Univers, CS 40700, 38058, Grenoble, France
| | - Laurence Lemelle
- LGL-TPE, Univ Lyon, Ens de Lyon, Univ Claude Bernard, CNRS UMR5276, F-69342, Lyon, France
| | - Vera Cuartero
- ESRF-The European Synchrotron, 71, Avenue des Martyrs, Grenoble, France
| | - Olivier Mathon
- ESRF-The European Synchrotron, 71, Avenue des Martyrs, Grenoble, France
| | - Sakura Pascarelli
- ESRF-The European Synchrotron, 71, Avenue des Martyrs, Grenoble, France
| | - Anne Bonnin
- Paul Scherrer Institut, CH-5232, Villigen PSI, Switzerland
| | - Russell Shapiro
- Geological and Environmental Sciences Department, CSU Chico, Chico, CA, USA
| | - Kurt Konhauser
- Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada
| | | | - Pierre Bleuet
- University Grenoble Alpes, F-38000, Grenoble, France
- CEA, LETI, MINATEC Campus, F-38054, Grenoble, France
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36
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Joseph B, Torchio R, Benndorf C, Irifune T, Shinmei T, Pöttgen R, Zerr A. Experimental evidence of an electronic transition in CeP under pressure using Ce L 3 XAS. Phys Chem Chem Phys 2017; 19:17526-17530. [PMID: 28657083 DOI: 10.1039/c7cp03022c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cerium phosphide undergoes a unit-cell volume discontinuity without any structural phase transitions upon application of a high pressure of ∼10 GPa. This phenomenon is attributed to a change in the electronic charge distribution of the cerium in CeP, but to date no direct experimental verification for this hypothesis has been presented. Here, we report a Ce L3-edge X-ray absorption spectroscopy study under pressure, which provides direct compelling evidence of an electronic transition associated with the above-mentioned isostructural volume discontinuity. The present results should be relevant to the understanding of the phenomenon of pressure induced isostructural transitions involving unit-cell volume collapse.
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Affiliation(s)
- B Joseph
- Elettra-Sincrotrone Trieste, Strada Statale 14, Km 163,5, Basovizza, Trieste, Italy.
| | - R Torchio
- European Synchrotron Radiation Facility, BP220, 38043 Grenoble Cedex, France
| | - C Benndorf
- Institut für Anorganische und Analytische Chemie Universitat Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - T Irifune
- Geodynamics Research Center, Ehime University, Bunkyo-cho, 7908577, Matsuyama, Japan
| | - T Shinmei
- Geodynamics Research Center, Ehime University, Bunkyo-cho, 7908577, Matsuyama, Japan
| | - R Pöttgen
- Institut für Anorganische und Analytische Chemie Universitat Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - A Zerr
- Laboratoire des Sciences des Procédés et des Materiaux LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité 93430, Villetaneuse, France
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37
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Martin NM, Nilsson J, Skoglundh M, Adams EC, Wang X, Smedler G, Raj A, Thompsett D, Agostini G, Carlson S, Norén K, Carlsson PA. Study of methane oxidation over alumina supported Pd–Pt catalysts using operando DRIFTS/MS and in situ XAS techniques. ACTA ACUST UNITED AC 2017. [DOI: 10.1080/2055074x.2017.1281717] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Natalia M. Martin
- Competence Centre for Catalysis, Chalmers University of Technology, Gothenburgh, Sweden
| | - Johan Nilsson
- Competence Centre for Catalysis, Chalmers University of Technology, Gothenburgh, Sweden
| | - Magnus Skoglundh
- Competence Centre for Catalysis, Chalmers University of Technology, Gothenburgh, Sweden
| | - Emma C. Adams
- Competence Centre for Catalysis, Chalmers University of Technology, Gothenburgh, Sweden
| | - Xueting Wang
- Competence Centre for Catalysis, Chalmers University of Technology, Gothenburgh, Sweden
| | | | | | | | | | | | | | - Per-Anders Carlsson
- Competence Centre for Catalysis, Chalmers University of Technology, Gothenburgh, Sweden
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38
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Benzi F, Sheppard TL, Doronkin DE, Meira DM, Gänzler AM, Baier S, Grunwaldt JD. Transient structural and catalytic behaviour of Pt-particles probed by operando spectroscopy during a realistic driving cycle. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00926g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Pt catalysts investigated with operando XAS under rapid transient temperature automotive driving cycle conditions.
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Affiliation(s)
- Federico Benzi
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Thomas L. Sheppard
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Catalysis Research and Technology
| | - Dmitry E. Doronkin
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Catalysis Research and Technology
| | | | - Andreas M. Gänzler
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Sina Baier
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Jan-Dierk Grunwaldt
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Catalysis Research and Technology
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39
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The dynamics of pseudocapacitive phenomena studied by Energy Dispersive X-Ray Absorption Spectroscopy on hydrous iridium oxide electrodes in alkaline media. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.06.149] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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40
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Probing local and electronic structure in Warm Dense Matter: single pulse synchrotron x-ray absorption spectroscopy on shocked Fe. Sci Rep 2016; 6:26402. [PMID: 27246145 PMCID: PMC4887872 DOI: 10.1038/srep26402] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 04/28/2016] [Indexed: 12/02/2022] Open
Abstract
Understanding Warm Dense Matter (WDM), the state of planetary interiors, is a new frontier in scientific research. There exists very little experimental data probing WDM states at the atomic level to test current models and those performed up to now are limited in quality. Here, we report a proof-of-principle experiment that makes microscopic investigations of materials under dynamic compression easily accessible to users and with data quality close to that achievable at ambient. Using a single 100 ps synchrotron x-ray pulse, we have measured, by K-edge absorption spectroscopy, ns-lived equilibrium states of WDM Fe. Structural and electronic changes in Fe are clearly observed for the first time at such extreme conditions. The amplitude of the EXAFS oscillations persists up to 500 GPa and 17000 K, suggesting an enduring local order. Moreover, a discrepancy exists with respect to theoretical calculations in the value of the energy shift of the absorption onset and so this comparison should help to refine the approximations used in models.
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41
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Asanova TI, Kantor I, Asanov IP, Korenev SV, Yusenko KV. Thermal decomposition of ammonium hexachloroosmate. Phys Chem Chem Phys 2016; 18:33134-33141. [DOI: 10.1039/c6cp07133c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A one-step mechanism of the thermal decomposition of (NH4)2[OsCl6] suggested previously proves to be unworkable under a time-resolved ED XAFS and PXRD study.
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Affiliation(s)
- T. I. Asanova
- Nikolaev Institute of Inorganic Chemistry SB RAS
- Novosibirsk
- Russia
| | - I. Kantor
- European Synchrotron Radiation Facility
- F-38043 Grenoble
- France
- Technical University of Denmark
- Department of Physics
| | - I. P. Asanov
- Nikolaev Institute of Inorganic Chemistry SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - S. V. Korenev
- Nikolaev Institute of Inorganic Chemistry SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - K. V. Yusenko
- College of Engineering
- Swansea University
- Bay Campus
- Swansea SA1 8EN
- UK
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