ORR Adsorbate Dynamics on Pt Single Crystal PEM Fuel Cells
Abstract
This paper presents a novel experimental setup for studying the ORR on well-defined single crystal Pt/Nafion interfaces. Low frequency inductive loops are observed in the impedance spectra that correspond to the dynamics of the adsorbed intermediates. An appropriate reaction mechanism is proposed and the kinetic parameters are derived using a combination of mathematical modeling and impedance analysis.
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The Pt(111) facet is most desirable in Pt-based electrocatalysts for ORR in PEM fuel cell applications.
“Therefore, the Pt (111) facet is most desirable in Pt-based electrocatalysts for ORR in PEM fuel cell applications.”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [88]
The dependence of ORR activity on Pt single-crystal surfaces is attributed to structure sensitive adsorption of intermediate species such as Oads and OHads.
“This dependence is attributed to the structure sensitive adsorption of intermediate species, such as O ads and OH ads .88”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [88]
The difference in ORR activity between Pt(111) and Pt(100) in Nafion is more prominent for the high current density regime.
“The difference in activity is more prominent for the high current density regime.”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [88]
Nafion resin acts as a non-interfering electrolyte for electrochemical reactions, and counter ions in the Nafion electrolyte do not affect chemical kinetics.
“This suggests that Naon™ resin acts as a non-interfering electrolyte for electrochemical reactions, which also means that counter ions in the Naon™ electrolyte do not affect the chemical kinetics.88”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [88]
Cited by
Sorted by citations
Sui, S., Wang, X., Zhou, X., Su, Y., Riffat, S., & Liu, C.-J. (2017) · Journal of Materials Chemistry A · doi:10.1039/c6ta08580f · Cited by 916 · see citing works
- Authors
- Dhanda, A., O'Hayre, R., & Pitsch, H.
- Affiliations
- Stanford University (US)
- ORCID
- Pitsch, Heinz
- Venue
- ECS Transactions
- Publisher
- The Electrochemical Society
- Published
- 2008-10-03
- Volume
- 16
- Issue
- 2
- Pages
- 1131-1142
- ISSN
- 1938-5862 (ISSN-L)
- 1938-6737
- OpenAlex
- W2001518895
- Cited by
- 12
- References
- 0
- Citations by year
- 2026: 1 · 2023: 1 · 2018: 1 · 2017: 1 · 2016: 3 · 2014: 3 · 2013: 1
- FWCI
- 1.04
- Type
- conference paper
- Language
- en
- Open access
- closed
- Licence
- Locations
- ECS Transactions (publishedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
- Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
- Keywords
- oxygen reduction reaction, adsorbate dynamics, platinum single crystals, proton exchange membrane fuel cells, inductive loop, impedance spectra, adsorbed intermediates, reaction mechanism, kinetic parameters, mathematical modeling
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