{
  "abstract": "High-entropy oxides retain a significantly larger population of oxygen vacancies (OVs) compared to their single-element or binary metal oxide counterparts, highlighting their unique potential as prospective electrocatalytic materials. However, the stabilization of surface oxygen vacancies (S-OVs) is highly challenging due to their inherently dynamic nature generally resulting in defect healing, migration, or initiation of structural collapse under operating conditions. By means of rational high-throughput materials science, we investigate the stability of S-OVs in (Cu-Fe-Ni-Cr-Zn)O x high-entropy oxides covering a compositional search space of at least 5 to 35 %. A methodology based on X-ray photoelectron spectroscopy and X-ray absorption spectroscopy is utilized to quantitatively follow the distribution of the OVs across the materials library. For low Zn stoichiometries, (Cu 14 -Fe 13 -Ni 5 -Cr 8 -Zn 4 )O 55 , complete stabilization of S-OVs is achieved even after prolonged exposure to ambient environment. The discovery of S-OV stabilization in our high-entropy oxide system is a prerequisite to exploit the unique properties of this class of materials for electrocatalytic applications and beyond.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 13,
  "authors": [
    {
      "name": "Johannes D. Bartl",
      "orcid": "0000-0003-3767-8782"
    },
    {
      "name": "Nophar Tubul Levy",
      "orcid": "0009-0009-1652-8671"
    },
    {
      "name": "Alina Sermiagin",
      "orcid": "0000-0002-3907-5267"
    },
    {
      "name": "Noa Levi",
      "orcid": "0009-0007-0609-9848"
    },
    {
      "name": "Sidharth Reghunathan",
      "orcid": "0009-0000-5237-4221"
    },
    {
      "name": "Bibhudatta Malik",
      "orcid": "0000-0001-5286-0027"
    },
    {
      "name": "Shany Myers",
      "orcid": "0009-0009-8978-8909"
    },
    {
      "name": "Adi Kama",
      "orcid": "0000-0001-5185-8873"
    },
    {
      "name": "Roberto Félix",
      "orcid": "0000-0002-3620-9899"
    },
    {
      "name": "Regan G. Wilks",
      "orcid": "0000-0001-5822-8399"
    },
    {
      "name": "Susan Nehzati"
    },
    {
      "name": "Marcus Bär",
      "orcid": "0000-0001-8581-0691"
    },
    {
      "name": "Hannah Noa Barad",
      "orcid": "0000-0003-0764-6421"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fmsqqt9zcmcrp.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15006746/v3",
  "fulltext_url": null,
  "id": "fmsqqt9zcmcrp",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15006746/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": "W7223289783",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-23",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/fmsqqt9zcmcrp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:26Z",
      "native_id": "10.26434/chemrxiv.15006746",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15006746/v3"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2105|Electrocatalysts for Energy Conversion",
      "subfield": "electrochemistry-energy"
    }
  ],
  "title": "Complete stabilization of surface oxygen vacancies in high-entropy oxides",
  "title_text": "Complete stabilization of surface oxygen vacancies in high-entropy oxides",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:26Z",
  "url": "https://research.draconitic.com/paper/fmsqqt9zcmcrp",
  "venue": "ChemRxiv",
  "versions": []
}