| Naslov: | Protocol for the ex-situ electrochemical performance evaluation of the high-temperature pemfc electrodes : activity, durability and wettability inter-relations |
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| Avtorji: | ID Maurya, Rajan Ma (Avtor)
ID Morgen, Per (Avtor)
ID Gyergyek, Sašo, Institut "Jožef Stefan" (Avtor)
ID Andersen, Shuang Ma (Avtor), et al. |
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| Datoteke: |  URL - Izvorni URL, za dostop obiščite https://iopscience.iop.org/article/10.1149/1945-7111/ae747a
 PDF - Predstavitvena datoteka, prenos (2,76 MB)
MD5: C2B1EDE73BC047C4893A0CFCA1E1BCB2
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| Jezik: | Angleški jezik |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: |  IJS - Institut Jožef Stefan
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| Povzetek: | Effect of pre-wetting on catalyst utilization and durability of high-temperature proton exchange membrane fuel cell (HT-PEMFC) gas diffusion electrodes (GDEs) was investigated in a three-electrode configuration. Pre-wetting protocols included treatment in ethanol-water mixture (0, 10, 50 and 100 % v/v ethanol), ethanol-water vapor and concentrated orthophosphoric acid (14.85 M) at 150 °C. All pre-wetting approaches significantly enhanced electrode wettability by reducing hydrophobicity and surface tension, leading to improved initial catalyst utilization. However, accelerated stress test (AST) revealed a trade-off between utilization and durability, with wetted electrodes exhibiting lower electrochemically active surface area (ECSA) and Pt retention compared to untreated electrodes. Changes in Pt crystallite and particle sizes during the AST were estimated through X-ray diffraction analysis and transmission electron microscopy. All three wetting procedures have similar effects on catalyst utilization and durability without compromising the structural integrity. Single-cell measurements showed that while pre-wetting is effective for rapid screening and improving the initial performance, its benefits are not directly transferable to practical operation without further optimization. These findings highlight the trade-off between catalyst utilization and durability in HT-PEMFC GDEs. |
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| Ključne besede: | electrocatalysts, accelerated stress test |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Poslano v recenzijo: | 13.01.2026 |
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| Datum objave: | 10.06.2026 |
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| Založnik: | Published on behalf of The Electrochemical Society by IOP Publishing Limited. |
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| Leto izida: | 2026 |
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| Št. strani: | str. 1-35 |
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| Številčenje: | Vol. , iss. |
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| PID: | 20.500.12556/DiRROS-30140  |
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| UDK: | 544.5/.6 |
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| ISSN pri članku: | 1945-7111 |
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| DOI: | 10.1149/1945-7111/ae747a |
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| COBISS.SI-ID: | 280065283 |
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| Avtorske pravice: | © 2026 The Author(s). |
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| Opomba: | Nasl. z nasl. zaslona;
Soavtor iz Slovenije: Sašo Gyergyek;
Opis vira z dne 2. 6. 2026;
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| Datum objave v DiRROS: | 16.06.2026 |
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| Število ogledov: | 47 |
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| Število prenosov: | 28 |
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| Metapodatki: |    |
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