The Pt(111)/electrolyte interface under oxygen reduction reaction conditions an electrochemical impedance spectroscopy study

The Pt(111)/electrolyte interface under oxygen reduction reaction conditions : an electrochemical impedance spectroscopy study

The Pt(111)/electrolyte interface has been characterized during the oxygen reduction reaction (ORR) in 0.1 M HClO(4) using electrochemical impedance spectroscopy. The surface was studied within the potential region where adsorption of OH* and O* species occur without significant place exchange betwe...

Ausführliche Beschreibung

Bibliographische Detailangaben
Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1999. - 27(2011), 5 vom: 01. März, Seite 2058-66
1. Verfasser: Bondarenko, Alexander S (VerfasserIn)
Weitere Verfasser: Stephens, Ifan E L, Hansen, Heine A, Pérez-Alonso, Francisco J, Tripkovic, Vladimir, Johansson, Tobias P, Rossmeisl, Jan, Nørskov, Jens K, Chorkendorff, Ib
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2011
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
Beschreibung
Zusammenfassung:The Pt(111)/electrolyte interface has been characterized during the oxygen reduction reaction (ORR) in 0.1 M HClO(4) using electrochemical impedance spectroscopy. The surface was studied within the potential region where adsorption of OH* and O* species occur without significant place exchange between the adsorbate and Pt surface atoms (0.45-1.15 V vs RHE). An equivalent electric circuit is proposed to model the Pt(111)/electrolyte interface under ORR conditions within the selected potential window. This equivalent circuit reflects three processes with different time constants, which occur simultaneously during the ORR at Pt(111). Density functional theory (DFT) calculations were used to correlate and interpret the results of the measurements. The calculations indicate that the coadsorption of ClO(4)* and Cl* with OH* is unlikely. Our analysis suggests that the two-dimensional (2D) structures formed in O(2)-free solution are also formed under ORR conditions
Beschreibung:Date Completed 07.06.2011
Date Revised 22.02.2011
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1520-5827
DOI:10.1021/la1042475