{
  "abstract": "High-entropy engineering of metal oxides provides a powerful platform for developing highly active and structurally robust catalysts; however, its application to heterogenous catalysis that requires stringent selectivity control remains largely unexplored. The low-temperature oxidative coupling of methane (OCM) demands catalysts that combine structural stability with precise tuning of surface basic strength. Here, we report a high-entropy lanthanoid oxide catalyst, (LaSmEuGdDy)0.4O3, synthesized via a sol-gel method using lanthanoid acetates and aspartic acid. The catalyst afforded ethylene and ethane in ∼12.3% total yield at temperatures less than 600 °C and maintained its catalytic activity for 240 h at 600 °C. Comparative studies with single-component lanthanoid oxides revealed that the high-entropy catalyst lowers the OCM onset temperature and markedly enhances catalyst durability. CO2 temperature-programmed desorption demonstrated that the surface basic strength of the high-entropy oxide can be systematically controlled through the average ionic radius, promoting the formation of moderately basic sites essential for low-temperature C-H activation. X-ray diffraction and photoelectron spectroscopy further showed that C-type rare-earth oxides exhibit superior resistance to transformation into less-active Ln2O2CO3 compared with A-type oxides and that the high-entropy configuration mitigates the progressive depletion of surface basic strength during prolonged OCM operation. These findings establish high-entropy design as an effective strategy for simultaneously controlling structural stability and surface functionality, opening new opportunities for selective heterogeneous catalysis.",
  "abstract_shown": true,
  "affiliations": [
    "Materials and Structures Laboratory, Institute of Integrated Research, Institute of Science Tokyo, Nagatsuta-cho 4259-R3-6, Midori-ku, Yokohama-city, Kanagawa226-8501, Japan."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Rena Takahashi"
    },
    {
      "affs": [
        0
      ],
      "name": "Keiju Wachi"
    },
    {
      "affs": [
        0
      ],
      "name": "Keigo Kamata",
      "orcid": "0000-0002-0624-8483"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7d9h8vm4vdkw2.bib",
  "cited_by": 0,
  "doi": "10.1021/jacs.6c15276",
  "fulltext_url": "https://europepmc.org/articles/PMC13721038",
  "id": "7d9h8vm4vdkw2",
  "issns": [
    "0002-7863",
    "1520-5126"
  ],
  "landing_url": "https://europepmc.org/article/MED/42954514",
  "language": "eng",
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Article"
    ],
    [
      "openalex",
      "1503|Catalysis and Oxidation Reactions"
    ]
  ],
  "openalex": "W7220925454",
  "pdf_url": "https://europepmc.org/articles/PMC13721038?pdf=render",
  "pmcid": "PMC13721038",
  "pmid": "42954514",
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7d9h8vm4vdkw2.ris",
  "sources": [
    {
      "first_seen": "2026-11-01T00:20:44Z",
      "native_id": "MED:42954514",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42954514"
    },
    {
      "first_seen": "2026-11-03T12:21:48Z",
      "native_id": "PMC13721038",
      "source": "pmc",
      "url": "https://doi.org/10.1021/jacs.6c15276"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1503|Catalysis and Oxidation Reactions",
      "subfield": "catalysis"
    }
  ],
  "title": "High-Entropy Lanthanoid Oxide Catalysts for Oxidative Coupling of Methane.",
  "title_text": "High-Entropy Lanthanoid Oxide Catalysts for Oxidative Coupling of Methane.",
  "type": "peer-reviewed",
  "updated_at": "2026-11-03T12:21:48Z",
  "url": "https://research.draconitic.com/paper/7d9h8vm4vdkw2",
  "venue": "Journal of the American Chemical Society",
  "versions": []
}