Surface microstructures and oxygen evolution properties of cobalt oxide deposited on Ir (111) and Pt (111) single crystal substrates
Abstract: We investigated the oxygen evolution reaction (OER) activity changes of cobalt oxide (CoO x) thin films on Ir (111) and Pt (111) substrates by repeated OER measurements in 0.1 M KOH. Atomic force microscopy and X‐ray photoelectron spectroscopy analysis of the as‐prepared CoO x/Ir (111) and CoO x/Pt (111) showed similar surface morphologies of the CoO x thin films and almost the same OER overpotentials, which were estimated to be around 430 mV. However, after three OER measurements, the overpotential of CoO x/Ir (111) decreased by 70 mV, whereas that of CoO x/Pt (111) increased slightly. Structural analysis showed that CoO x/Ir (111) revealed the island‐like nanostructures of CoO x dispersed on Ir (111) surface, accompanied by the generation of CoOOH. In contrast, for CoO x/Pt (111), the Pt (111) substrate remains covered by the CoO x thin film. The results suggest that the interaface at CoO x (CoOOH) nano‐islands and Ir (111) substrate are responsible for reducing the OER overpotential.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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Surface microstructures and oxygen evolution properties of cobalt oxide deposited on Ir (111) and Pt (111) single crystal substrates ; day:11 ; month:09 ; year:2022 ; extent:9
Electrochemical science advances ; (11.09.2022) (gesamt 9)
- Urheber
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Todoroki, Naoto
Tsurumaki, Hiroto
Shinomiya, Arata
Wadayama, Toshimasa
- DOI
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10.1002/elsa.202200007
- URN
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urn:nbn:de:101:1-2022091215103721323340
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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15.08.2025, 07:38 MESZ
Datenpartner
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Beteiligte
- Todoroki, Naoto
- Tsurumaki, Hiroto
- Shinomiya, Arata
- Wadayama, Toshimasa
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