Stability Investigations on a PtHGS Catalyst as a Model Material for Fuel Cell Applications: The Role of the Local pH
Abstract: Increasing the resistance of catalysts against electrochemical degradation is one of the key requirements for the wider use of Proton Exchange Membrane Fuel Cells (PEMFCs). Here, we study the degradation of one entity of a highly stable catalyst, Pt@HGS, on a nanoelectrode under accelerated mass transport conditions. We find that the catalyst degrades more rapidly than expected based on previous ensemble measurements. Corroborated by identical location transmission electron microscopy and catalyst layer experiments, we deduce that locally different pH values are likely the reason for this difference in stability. Ultimately, this work provides insights into the actual conditions present in a PEMFC and raises questions about the applicability of accelerated stress tests usually performed to evaluate catalyst stability, particularly when they are performed in half‐cell setups under inert gas.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Stability Investigations on a PtHGS Catalyst as a Model Material for Fuel Cell Applications: The Role of the Local pH ; day:13 ; month:11 ; year:2023 ; extent:7
Angewandte Chemie / International edition. International edition ; (13.11.2023) (gesamt 7)
- Creator
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Gunnarson, Alexander
Quast, Thomas
Dieckhöfer, Stefan
Pfänder, Norbert
Schüth, Ferdi
Schuhmann, Wolfgang
- DOI
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10.1002/anie.202311780
- URN
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urn:nbn:de:101:1-2023111414134228219984
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:48 AM CEST
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Associated
- Gunnarson, Alexander
- Quast, Thomas
- Dieckhöfer, Stefan
- Pfänder, Norbert
- Schüth, Ferdi
- Schuhmann, Wolfgang
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