{
  "abstract": "Engineering electrocatalyst resistance to degradation in alkaline media remains a major challenge for developing stable, earth-abundant oxygen evolution reaction (OER) anodes. Here, we combined acid–base titration and X-ray fluorescence to quantify Fe dissolution from a series of bimettalic FexMy (oxy)hydroxides deposited on Fe foils (My = Sn, Hf, Mn, Se) at 1.66–2.11 VRHE, showing that apparently stable current densities and cycle voltametery alone can mask significant electrode degradation. After initial restructuring (~2 h), end-of-life anodes showed steady-state dissolution rates of 0.15–0.67 mgFe cm⁻² h⁻¹ near OER onset (~1.75 VRHE). Across alloys, dissolution rates and OER overpotentials correlated with the Fe–My electronegativity difference. Dissolution rates were highest for those alloys where My was less electronegative than Fe, and XPS revealed a more reduced surface with higher concentrations of hydroxoligands. Spin-polarized DFT+U shows Sn reduces neighboring Fe atoms, shifting the potential-limiting OER step to Fe–O* formation, lowering its formation free energy (consistent with a reduced OER overpotential); but elongating Fe-O bonds (perhaps accelerating dissolution). Generalizing these results toward future work, we suggest that the dissolution resistance of FeOOH surfaces may be controlled by alloy-driven modulation of their protonation state (revealed by XPS) and Fe-O bond character (probed by DFT).",
  "abstract_shown": true,
  "affiliations": [
    "Syracuse University",
    "Brookhaven National Laboratory",
    "Louisiana State University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Shayan Hoseini"
    },
    {
      "affs": [
        0
      ],
      "name": "Foroogh Khezeli"
    },
    {
      "affs": [
        1
      ],
      "name": "Ashley Head"
    },
    {
      "affs": [
        2
      ],
      "name": "Craig Plaisance"
    },
    {
      "affs": [
        0
      ],
      "name": "Theodore Walker",
      "orcid": "0000-0003-4459-021X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/62z4v3jp3wmpv.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv-2025-4nzrw/v3",
  "fulltext_url": null,
  "id": "62z4v3jp3wmpv",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv-2025-4nzrw/v3",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2105|Electrocatalysts for Energy Conversion"
    ]
  ],
  "openalex": "W7214105417",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv-2025-4nzrw/v3",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/62z4v3jp3wmpv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:21Z",
      "native_id": "10.26434/chemrxiv-2025-4nzrw",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv-2025-4nzrw/v3"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2105|Electrocatalysts for Energy Conversion",
      "subfield": "electrochemistry-energy"
    }
  ],
  "title": "Fundamental Investigations into the Activity and Stability of Iron-Based Bimetallic Catalysts for the Oxygen Evolution Reaction",
  "title_text": "Fundamental Investigations into the Activity and Stability of Iron-Based Bimetallic Catalysts for the Oxygen Evolution Reaction",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:21Z",
  "url": "https://research.draconitic.com/paper/62z4v3jp3wmpv",
  "venue": "ChemRxiv",
  "versions": []
}