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Scherzer, Michael ; Girgsdies, Frank ; Stotz, Eugen ; Willinger, Marc-Georg ; Frei, Elias ; Schlögl, Robert ; Pietsch, Ullrich ; Lunkenbein, Thomas:
Electrochemical Surface Oxidation of Copper Studied by in Situ Grazing Incidence X-ray Diffraction.
In: The Journal of Physical Chemistry C.
Bd. 123
(2019)
Heft 21
.
- S. 13253-13262.
ISSN 1932-7455
DOI: https://doi.org/10.1021/acs.jpcc.9b00282
Abstract
Grazing incidence X-ray diffractometry (GIXRD) can deliver integral information on the structure and chemistry of surface near regions, which can be beneficial for functional materials related to interfacial reactions. Here, we present an in situ laboratory GIXRD setup for electrochemical experiments. The method is capable of directly correlating changes of the crystalline surface structure to the electrochemical conditions. It combines cyclovoltametric (CV) and chronoamperometric (CA) curves of crystalline samples, which can be recorded over the entire pH range, with simultaneous GIXRD measurements. The stepwise oxidation of polycrystalline copper in alkaline medium acts as an example to prove the functionality of the setup. In situ GIXRD measurements during CA experiments reveal a stepwise oxidation mechanism of metallic Cu to Cu2+ involving crystalline cuprite (Cu2O) intermediates. The results highlight the importance of conducting in situ experiments under controlled environments comparable simple oxidation reaction in order to track transient states even for a comparable simple oxidation reaction.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | WOS:000470045500009 |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 12 Jun 2025 12:55 |
| Letzte Änderung: | 12 Jun 2025 12:55 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93710 |