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Gold autodeactivation during oxygen electroreduction studied by electrochemical impedance spectroscopy
Laboratory of Electrocatalysis and Fuel Cells, A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Leninsky Prospect 31, RU-119071 Moscow, Russia.
Laboratory of Electrocatalysis and Fuel Cells, A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Leninsky Prospect 31, RU-119071 Moscow, Russia.
Laboratory of Electrocatalysis and Fuel Cells, A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Leninsky Prospect 31, RU-119071 Moscow, Russia.
Malmö högskola, Faculty of Health and Society (HS), Department of Biomedical Science (BMV). Laboratory of Electrocatalysis and Fuel Cells, A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Leninsky Prospect 31, RU-119071 Moscow, Russia.
2012 (English)In: Journal of Electroanalytical Chemistry, ISSN 0022-0728, E-ISSN 1873-2569, Vol. 683, p. 21-24Article in journal (Refereed) Published
Abstract [en]

The deactivation of a polycrystalline gold electrode is observed during oxygen electroreduction reaction (ORR) in basic medium. At that, the cause of the process is chemical decomposition of the ORR intermediate and blocking of active sites of the electrode surface by hydroxyl radical-like species. The deactivation mechanism is discussed.

Highlights

► Gold autodeactivation during oxygen electroreduction reaction. ► Strong hydroxyl radical-like species adsorption. ► Superoxide radical-like species formation on p-Au. ► Impedance data analysis and model calculations.
Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 683, p. 21-24
Keywords [en]
Autodeactivation, Oxygen reduction reaction, Impedance, Superoxide, Gold, Catalysis
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:mau:diva-4155DOI: 10.1016/j.jelechem.2012.07.030ISI: 000310126300003Scopus ID: 2-s2.0-84865342335Local ID: 14990OAI: oai:DiVA.org:mau-4155DiVA, id: diva2:1400985
Available from: 2020-02-28 Created: 2020-02-28 Last updated: 2025-01-16Bibliographically approved

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Andoralov, Victor

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