| Zugriffsnummer | 45875 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Direct observation of the xenon physisorption process in mesopores by combining in situ anomalous small-angle X‑ray scattering and X‑ray absorption spectroscopy |
| Autor(in); Institution |
Gericke, Eike; Helmholtz-Zentrum Berlin, Berlin, GERMANY
Wallacher, Dirk; Helmholtz-Zentrum Berlin, Berlin, GERMANY
Wendt, Robert; Helmholtz-Zentrum Berlin, Berlin, GERMANY
Greco, Giorgia; Helmholtz-Zentrum Berlin, Berlin, GERMANY
Krumrey, Michael; 7.2, Röntgenmesstechnik mit Synchrotronstrahlung, PTB-Berlin
Raoux, Simone; Helmholtz-Zentrum Berlin, Berlin, GERMANY
Hoell, Armin; Helmholtz-Zentrum Berlin, Berlin, GERMANY
Mascotto, Simone; Institut für Anorganische und Angewandte Chemie, Universität Hamburg, GERMANY
|
| Quelle/Jahr | The Journal of Physical Chemistry Letters: 12 (2021), 4018 - 4023 |
| Availability | [online only] |
| ISSN | 1948-7185 |
| DOI | |
| Verlag | Washington, DC: ACS Publications |
| Zusammenfassung | The morphology and structural changes of confined matter are still far from being understood. This report deals with the development of a novel in situ method based on the combination of anomalous small-angle X-ray scattering (ASAXS) and X-ray absorption near edge structure (XANES) spectroscopy to directly probe the evolution of the xenon adsorbate phase in mesoporous silicon during gas adsorption at 165 K. The interface area and size evolution of the confined xenon phase were determined via ASAXS demonstrating that filling and emptying the pores follow two distinct mechanisms. The mass density of the confined xenon was found to decrease prior to pore emptying. XANES analyses showed that Xe exists in two different states when confined in mesopores. This combination of methods provides a smart new tool for the study of nanoconfined matter for catalysis, gas, and energy storage applications. |
| Themenbereich der Metrologie | Photometrie und Radiometrie |
Zitierung
Gericke, E., Wallacher, D., Wendt, R., Greco, G., Krumrey, M., Raoux, S., Hoell, A., & Mascotto, S. (2021). Direct observation of the xenon physisorption process in mesopores by combining in situ anomalous small-angle X‑ray scattering and X‑ray absorption spectroscopy. The Journal of Physical Chemistry Letters, 12, 4018–4023. https://doi.org/10.1021/acs.jpclett.1c00557