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Kinetics of oxygen reduction reaction on three different Pt surfaces of Pt/C catalyst analyzed by rotating ring-disk electrode in acidic solution

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1016/j.jpowsour.2014.01.042
AuthorSearch for: 1ORCID identifier: https://orcid.org/0000-0002-1823-2948; Search for: 1; Search for: 1
Affiliation
  1. National Research Council of Canada. Energy, Mining and Environment
FormatText, Article
Subjectoxygen reduction reaction; Pt/C catalyst; kinetic constants; Pt surface structure
Abstract
The oxygen reduction reaction (ORR) on a Pt/C-based thin catalyst layer is studied using the rotating ring-disk electrode (RRDE) technique in an O 2-saturated acid solution. A modified model for obtaining the ORR constants in different electrode potential ranges is validated using the experimental disk and ring currents. The results calculated from the model and the Koutecky-Levich plots reveal that the ORR constants on three different Pt surfaces (Pt-H, Pt, and PtOX/Pt) are significantly different, among which, pure Pt surface is found to have the best activity towards ORR. This model can also give a detailed formularization of the apparent ORR electron transfer number (n) and the percentage of H2O2 (%H 2O2) produced during the ORR process. © 2014 Published by Elsevier B.V.
Publication date
PublisherElsevier
In
  • Journal of Power Sources 255 (June 2014): 242–250.
LanguageEnglish
Peer reviewedYes
NPARC number21270823
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Record identifier13053465-7330-49e1-9f0e-00a696be1fe4
Record created2014-02-17
Record modified2021-08-26
Date modified: