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Metal-oxide phase transition of platinum nanocatalyst below fuel cell open-circuit voltage

Author

Listed:
  • Carlos A. Campos-Roldán

    (34095)

  • Amir Gasmi

    (34095)

  • Meryem Ennaji

    (34095)

  • Morgane Stodel

    (31062)

  • Isaac Martens

    (38043)

  • Jean-Sébastien Filhol

    (34095)

  • Pierre-Yves Blanchard

    (34095)

  • Sara Cavaliere

    (34095)

  • Deborah Jones

    (34095)

  • Jakub Drnec

    (38043)

  • Raphaël Chattot

    (34095)

Abstract

The long-term stability of Pt-based catalysts is critical to the reliability of proton exchange membrane fuel cells (PEMFCs), and receives constant attention. However, the current knowledge of Pt oxidation is restricted to unrealistic PEMFC cathode environment or operation, which questions its practical relevance. Herein, Pt oxidation is investigated directly in a PEMFC with stroboscopic operando high energy X-ray scattering. The onset potential for phase transition of the nanoparticles surface from metallic to amorphous electrochemical oxide is observed far below previously reported values, and most importantly, below the open-circuit potential of PEMFC cathode. Such phase transition is shown to impact PEMFC performance and its role on Pt transient dissolution is verified by electrochemical on-line inductively coupled plasma mass spectrometry. By further demonstrating and resolving the limitations of currently employed accelerated stress test protocols in the light of metal-oxide phase transitions kinetics, this picture of Pt oxidation enables new mitigation strategies against PEMFC degradation.

Suggested Citation

  • Carlos A. Campos-Roldán & Amir Gasmi & Meryem Ennaji & Morgane Stodel & Isaac Martens & Jean-Sébastien Filhol & Pierre-Yves Blanchard & Sara Cavaliere & Deborah Jones & Jakub Drnec & Raphaël Chattot, 2025. "Metal-oxide phase transition of platinum nanocatalyst below fuel cell open-circuit voltage," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-024-55299-3
    DOI: 10.1038/s41467-024-55299-3
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    References listed on IDEAS

    as
    1. Rubén Rizo & Julia Fernández-Vidal & Laurence J. Hardwick & Gary A. Attard & Francisco J. Vidal-Iglesias & Victor Climent & Enrique Herrero & Juan M. Feliu, 2022. "Author Correction: Investigating the presence of adsorbed species on Pt steps at low potentials," Nature Communications, Nature, vol. 13(1), pages 1-1, December.
    2. Rubén Rizo & Julia Fernández-Vidal & Laurence J. Hardwick & Gary A. Attard & Francisco J. Vidal-Iglesias & Victor Climent & Enrique Herrero & Juan M. Feliu, 2022. "Investigating the presence of adsorbed species on Pt steps at low potentials," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    3. Laetitia Dubau & Luis Castanheira & Frédéric Maillard & Marian Chatenet & Olivier Lottin & Gaël Maranzana & Jérôme Dillet & Adrien Lamibrac & Jean‐Christophe Perrin & Eddy Moukheiber & Assma ElKaddour, 2014. "A review of PEM fuel cell durability: materials degradation, local heterogeneities of aging and possible mitigation strategies," Wiley Interdisciplinary Reviews: Energy and Environment, Wiley Blackwell, vol. 3(6), pages 540-560, November.
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