{
  "abstract": "Ir-M mixed-metal oxides with M = Ti, Nb, and Ta offer a route to reduce the use of scarce Ir while balancing activity and stability for the acidic oxygen evolution reaction (OER). However, conventional preparation routes yield either poorly controlled, unstable amorphous materials or highly crystalline, phase-separated oxides with low activity. Here, we report sub-3-nm crystalline nanoparticles of rutile-type IrTaOx. Ir selectively absorbs laser light, promoting rapid crystallization and atomic mixing with Ta under non-equilibrium conditions. With only 35 wt% Ir, the catalyst exhibits a mass activity of 449 mA mgIr-1 at 300 mV overpotential and a stability matching that of the most stable commercial IrO2 catalyst. Simulations attributed the stability to stronger Ta–O bonding at the IrO2(110) surface, reinforcing the oxide lattice and raising the energy required to form oxygen vacancies associated with Ir dissolution. This work demonstrates that laser-induced nanoengineering enables otherwise challenging crystalline, phase-homogeneous mixed oxides with improved noble-metal utilization.",
  "abstract_shown": true,
  "affiliations": [
    "Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IET-2, Cauerstraße 1, Erlangen, Germany, 91058",
    "Sustainable Energy Materials, Technical University of Munich, Campus Straubing, Schulgasse 22, Straubing, Germany, 94315",
    "Institute of Chemical Research of Catalonia (ICIQ-CERCA), The Barcelona Institute of Science and Technology (BIST",
    "Department Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Immerwahrstraße 2a, Erlangen, Germany, 91058",
    "Institute of Micro- and Nanostructure Research (IMN) and Center for Nanoanalysis and Electron Microscopy (CENEM, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU, Cauerstraße 3, Erlangen, Germany, 91058",
    "Bundesanstalt für Materialforschung und -prüfung (BAM, Richard-Willstätter-Straße 11, Berlin, Germany, 12489",
    "Center for Photon Science, Paul Scherrer Institut, Forschungsstrasse 111, Villigen PSI, Switzerland, 5232"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 17,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Andreas Göpfert"
    },
    {
      "affs": [
        2
      ],
      "name": "Lulu Li"
    },
    {
      "affs": [
        0,
        3
      ],
      "name": "Yunsheng Qiu"
    },
    {
      "affs": [
        0
      ],
      "name": "Andreas Hutzler"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Mattis Goßler"
    },
    {
      "affs": [
        1
      ],
      "name": "Philipp Pfeifer"
    },
    {
      "affs": [
        0,
        3
      ],
      "name": "A. Lucía Morales"
    },
    {
      "affs": [
        4
      ],
      "name": "Mingjian Wu"
    },
    {
      "affs": [
        4
      ],
      "name": "Erdmann Spiecker"
    },
    {
      "affs": [
        0
      ],
      "name": "Serhiy Cherevko"
    },
    {
      "affs": [
        5
      ],
      "name": "Ana Guilherme Buzanich"
    },
    {
      "affs": [
        5
      ],
      "name": "Martin Radtke"
    },
    {
      "affs": [
        6
      ],
      "name": "Aram Bugaev"
    },
    {
      "affs": [
        1
      ],
      "name": "Souriddha Sanyal"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Huize Wang",
      "orcid": "0000-0002-0424-8068"
    },
    {
      "affs": [
        2
      ],
      "name": "Núria López"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Marc Ledendecker"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6vg5zfm46mn6c.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15008137/v1",
  "fulltext_url": null,
  "id": "6vg5zfm46mn6c",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008137/v1",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2105|Electrocatalysts for Energy Conversion"
    ]
  ],
  "openalex": "W7204911081",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15008137/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/6vg5zfm46mn6c.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:17Z",
      "native_id": "10.26434/chemrxiv.15008137",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008137/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2105|Electrocatalysts for Energy Conversion",
      "subfield": "electrochemistry-energy"
    }
  ],
  "title": "Laser-engineered Crystalline Rutile-Type Iridium-Tantalum Oxide with Enhanced OER Activity and Stability",
  "title_text": "Laser-engineered Crystalline Rutile-Type Iridium-Tantalum Oxide with Enhanced OER Activity and Stability",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:17Z",
  "url": "https://research.draconitic.com/paper/6vg5zfm46mn6c",
  "venue": "ChemRxiv",
  "versions": []
}