{
  "abstract": "High-temperature proton exchange membrane fuel cells (HT-PEMFCs) are advantageous for heavy-duty vehicles owing to their operating temperature (150-200°C), which facilitates the stacks heat management, hence decreases the system global weight. A HT-PEMFC membrane electrode assembly (MEA) commonly relies on phosphoric acid-doped polybenzimidazole membranes. While H3PO4 is optimal in terms electrolyte and membrane properties in HT-PEMFC, it strongly impacts the activity of Pt-based electrocatalysts. In this work, a wide catalyst library highlights most of the material characteristics that, according to the literature, influence phosphate poisoning mechanisms and possibly mitigate the penalty in oxygen reduction reaction (ORR): carbon support, Pt loading on carbon, Pt nanoparticles size, Pt-alloying effect (strain effect) and nano-particles morphology (octahedron (facets orientation), sponges, carbon cap). By electrochemically characterizing the catalyst library, this work aims to understand their ORR activity decline in 1 M H3PO4 vs 1 M HClO4 electrolytes at room temperature. The electrolyte used is relatively concentrated compared to model study in RDE in which the H3PO4 concentration does not exceed 0.1 M (often in a mix with HClO4). Whatever the electrocatalyst, the electrochemical surface area available in H3PO4 decreases by 20-40% compared to HClO4, while a ca. tenfold decline in ORR specific activity is observed. The results highlight the leading-order parameter influencing the absolute catalyst activity in H3PO4: the adsorbates coverage rate by various phosphates species (θ(HxPO4(3-x)-) and θ(HxPO3(3-x)-)), and a second order parameter: the Pt-O, with O from OH*, binding energy on each catalyst (catalyst material-dependent). Both parameters follow a Butler-Volmer model with Frumkin adsorption/desorption isotherm. The loss rate versus HClO4 suggest that the SA retention in H3PO4 also depends on a third order parameter: interactions between adsorbates at the surface of the catalyst, and in the electrochemical double-layer, described by the Frumkin correction, which is largely affected by operating conditions (electrolyte anions concentration and temperature).",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "name": "Axelle Baudy"
    },
    {
      "name": "Marion Scohy"
    },
    {
      "name": "Amaria Oudjdi"
    },
    {
      "name": "Tristan Asset"
    },
    {
      "name": "Camille Roiron"
    },
    {
      "name": "Marian Chatenet"
    },
    {
      "name": "Laetitia Dubau"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3tpvhwfw7n78y.bib",
  "cited_by": 1,
  "doi": "10.1021/acscatal.6c00952",
  "fulltext_url": null,
  "id": "3tpvhwfw7n78y",
  "issns": [
    "2155-5435",
    "2155-5435"
  ],
  "landing_url": "https://univ-grenoble-alpes.hal.science/hal-05766681v1",
  "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.cata"
    ],
    [
      "hal",
      "1.chim.mate"
    ],
    [
      "openalex",
      "2105|Electrocatalysts for Energy Conversion"
    ]
  ],
  "openalex": "W7162397373",
  "pdf_url": "https://univ-grenoble-alpes.hal.science/hal-05766681/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-05-26",
  "publisher": "American Chemical Society",
  "ris": "https://research.draconitic.com/paper/3tpvhwfw7n78y.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:42Z",
      "native_id": "hal-05766681",
      "source": "hal",
      "url": "https://univ-grenoble-alpes.hal.science/hal-05766681v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "hal:1.chim.cata",
      "subfield": "catalysis"
    },
    {
      "field": "chemistry",
      "origin": "hal:1.chim.mate",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Oxygen Reduction Reaction Performance in Phosphoric Acid of a Catalyst Library for High-Temperature Proton Exchange Membrane Fuel Cell",
  "title_text": "Oxygen Reduction Reaction Performance in Phosphoric Acid of a Catalyst Library for High-Temperature Proton Exchange Membrane Fuel Cell",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:42Z",
  "url": "https://research.draconitic.com/paper/3tpvhwfw7n78y",
  "venue": "ACS Catalysis",
  "versions": []
}