{
  "abstract": "Engineering the electronic structure of molybdenum disulfide (MoS2) through phase composition and intrinsic defect chemistry offers a promising strategy to overcome its limited hydrogen evolution reaction (HER) activity in acidic media. Herein, we report a phase-relaxation-assisted mechanism in delaminated MoS2 nanoflower-derived nanosheets, where controlled cathodic biasing induces a partial transformation from the metallic 1T phase to the semiconducting 2H phase while the intrinsic structural defects present in the as-synthesized material are preserved. Under HER conditions, surface oxidation (formation of S–Ox species) increases, yet the overall S/Mo stoichiometry remains unchanged. The synergistic features enable efficient charge transfer and deliver an overpotential of 198 mV at 10 mA cm–2, a Tafel slope of 87 mV dec–1, and a hydrogen production rate of ∼11.2 mol g–1 at 50 mA cm–2. In situ electron paramagnetic resonance, combined with ex situ Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy, confirm the initial 1T-rich character, the progressive 1T → 2H relaxation under HER conditions, and the persistence of defect-enriched regions alongside surface oxidation. These findings highlight the subtle activation–deactivation interplay in MoS2 catalysts and underscore the importance of phase stability and intrinsic defect control for durable, high-performance HER MoS2-based electrocatalysis.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "name": "Karolina Wenelska"
    },
    {
      "name": "Grzegorz Leniec"
    },
    {
      "name": "Veronica Montes-García"
    },
    {
      "name": "Tomasz Chudziak"
    },
    {
      "name": "Martijn De Feyter"
    },
    {
      "name": "Bowen Zhang"
    },
    {
      "name": "Xiaoguang Liu"
    },
    {
      "name": "Artur Ciesielski"
    },
    {
      "name": "Ewa Mijowska"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1khtfy1z3r0f8.bib",
  "cited_by": 1,
  "doi": "10.1021/acs.chemmater.6c01450",
  "fulltext_url": null,
  "id": "1khtfy1z3r0f8",
  "issns": [
    "0897-4756",
    "1520-5002"
  ],
  "landing_url": "https://univoak.hal.science/hal-05759867v1",
  "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"
    ],
    [
      "openalex",
      "2105|Electrocatalysts for Energy Conversion"
    ]
  ],
  "openalex": "W7206161951",
  "pdf_url": "https://univoak.hal.science/hal-05759867/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-31",
  "publisher": "American Chemical Society",
  "ris": "https://research.draconitic.com/paper/1khtfy1z3r0f8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:39Z",
      "native_id": "hal-05759867",
      "source": "hal",
      "url": "https://univoak.hal.science/hal-05759867v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2105|Electrocatalysts for Energy Conversion",
      "subfield": "electrochemistry-energy"
    }
  ],
  "title": "Defect-Driven Catalysis and Phase Relaxation in MoS2 Nanoflower-Derived Nanosheets during Hydrogen Evolution",
  "title_text": "Defect-Driven Catalysis and Phase Relaxation in MoS2 Nanoflower-Derived Nanosheets during Hydrogen Evolution",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:39Z",
  "url": "https://research.draconitic.com/paper/1khtfy1z3r0f8",
  "venue": "Chemistry of Materials",
  "versions": []
}