{
  "abstract": "Carbon-capped PtNi catalysts supported on a graphitized carbon black (PtNi@C/Gr.C) were elaborated, characterized and implemented in membrane electrode assemblies (MEAs) for tests in differential cell configuration. Two types of carbon-capped catalysts were evaluated: one activated electrochemically via operando cycling within the cell, and the other chemically, using nitric acid prior to MEA fabrication and cell integration. These materials were benchmarked versus a robust graphitized carbon black-supported Pt reference catalyst (Pt/Gr.C). The initial performance of the two PtNi@C/Gr.C catalysts exceeds that of Pt/Gr.C in RDE and unit proton exchange membrane fuel cell (PEMFC), especially under hot and dry conditions (95 °C and 30 % RH, mimicking heavy-duty PEMFC operation), likely due to the alloying effect of Ni which translates into higher surface tension and their (electro)chemical activation. A 30,000-cycle accelerated stress test performed at 95 °C between 0.6 and 0.85 V was applied to these catalysts, and no significant performance degradation was observed at end-of-life, confirming the successful integration of acid-treated carbon-capped PtNi catalyst in a small single PEMFC. The present carbon-capping and Ni-alloying methodology therefore enables to improve the ORR activity of Pt/Gr.C without compromising the stability of this inherently-stable catalyst, an endeavor towards heavy-duty PEMFC applications.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 10,
  "authors": [
    {
      "name": "Quentin Labarde"
    },
    {
      "name": "Clémence Marty"
    },
    {
      "name": "Thomas Gaumont"
    },
    {
      "name": "Vincent Martin"
    },
    {
      "name": "Julien Gallet"
    },
    {
      "name": "Julien Giboz"
    },
    {
      "name": "Frédéric Maillard"
    },
    {
      "name": "Laetitia Dubau"
    },
    {
      "name": "Fabrice Micoud"
    },
    {
      "name": "Marian Chatenet"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cafmd7hqmzva5.bib",
  "cited_by": 4,
  "doi": "10.1016/j.electacta.2025.146910",
  "fulltext_url": null,
  "id": "cafmd7hqmzva5",
  "issns": [
    "0013-4686"
  ],
  "landing_url": "https://hal.science/hal-05265307v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "hal",
      "1.chim.mate"
    ],
    [
      "openalex",
      "2105|Electrocatalysts for Energy Conversion"
    ]
  ],
  "openalex": "W4412420744",
  "pdf_url": "https://hal.science/hal-05265307/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/cafmd7hqmzva5.ris",
  "sources": [
    {
      "first_seen": "2026-10-31T12:20:56Z",
      "native_id": "hal-05265307",
      "source": "hal",
      "url": "https://hal.science/hal-05265307v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "hal:1.chim.mate",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Evaluation of carbon-capped PtNi nanoparticles supported on graphitized carbon black – from rotating disk electrode to unit proton exchange membrane fuel cell operated at 95 °C",
  "title_text": "Evaluation of carbon-capped PtNi nanoparticles supported on graphitized carbon black – from rotating disk electrode to unit proton exchange membrane fuel cell operated at 95 °C",
  "type": "peer-reviewed",
  "updated_at": "2026-11-01T12:20:46Z",
  "url": "https://research.draconitic.com/paper/cafmd7hqmzva5",
  "venue": "Electrochimica Acta",
  "versions": []
}