Extracting the kinetic parameters of the hydrogen evolution reaction at Pt in acidic media by means of dynamic multi-frequency analysis
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Extracting the kinetic parameters of the hydrogen evolution reaction at Pt in acidic media by means of dynamic multi-frequency analysis.pdf | 1.33 MB | Adobe PDF | Anzeigen |
Autor/Autorin: | Koster, Dominique Zeradjanin, Aleksandar Battistel, Alberto La Mantia, Fabio |
Zusammenfassung: | Herein, we use dynamic multi-frequency analysis (DMFA) to investigate the reaction kinetics of a paradigm electro-catalytic reaction, i.e. the hydrogen evolution reaction (HER) at polycrystalline Pt electrodes in acidic media. DMFA allows measuring dynamic impedance spectra under non-steady state conditions, as it is the case to avoid the formation of hydrogen bubbles. The extracted impedance spectra were fitted using electrical equivalent circuits (EECs) based on an analytical model, which took into account a Volmer-Tafel mechanism for hydrogen evolution. We found that the EECs based on this model can serve as suitable electrical analog in order to describe the physico-electrochemical processes that govern the different stages of the HER. |
Schlagwort: | Dynamic impedance spectroscopy; Dynamic multi-frequency analysis; Electrolysis; Hydrogen evolution reaction | Veröffentlichungsdatum: | 10-Jun-2019 | Projekt: | Electron- and Ion Transfer at the Interface: a Hyphenated Dynamic Multi-Frequency Approach | Projektnummer: | 772579 | Zeitschrift/Sammelwerk: | Electrochimica Acta | Seiten: | 34 | Dokumenttyp: | Artikel/Aufsatz | ISSN: | 0013-4686 | Zweitveröffentlichung: | no | Dokumentversion: | Postprint | DOI: | 10.26092/elib/362 | URN: | urn:nbn:de:gbv:46-elib45658 | Fachbereich: | Fachbereich 04: Produktionstechnik, Maschinenbau & Verfahrenstechnik (FB 04) |
Enthalten in den Sammlungen: | Forschungsdokumente |
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