{
  "abstract": "Photocorrosion remains a major challenge that hinders the development of photoelectrochemical (PEC) solar fuel production. Although Cu2O is a promising photocathode material due to its suitable band structure and visible light absorption, both oxidative and reductive photocorrosion pathways have been reported, with no consensus established in the research community in the PEC system. In this work, we fabricate three Cu2O photocathodes with distinct charge transport properties to investigate the correlation between charge accumulation and photocorrosion behavior. Both oxidative and reductive photocorrosion were observed depending on the type and location of charge accumulation. Notably, we propose a refined oxidative photocorrosion mechanism in which photogenerated holes induce surface Cu2O dissolution to Cu2+, followed by coordination with adsorbed *OH to form Cu(OH)2/CuO under illumination, which is contrary to the widely assumed direct oxidation from Cu2O to CuO. This work not only provides a unified understanding of the dual photocorrosion pathways in Cu2O, but also offers a generalizable framework for understanding photo-induced degradation in metal oxide photocathodes and for guiding the design of more robust PEC systems through charge transport engineering.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada",
    "State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, People’s Republic of China",
    "Canadian Light Source Inc., Saskatoon, SK S7N 0X4, Canada",
    "College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, Guangdong, People’s Republic of China"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Yi-Cheng Wang",
      "orcid": "0009-0009-0324-2666"
    },
    {
      "affs": [
        1
      ],
      "name": "Chenyu Xu",
      "orcid": "0000-0001-5240-7599"
    },
    {
      "affs": [
        0
      ],
      "name": "Peng-Fei Sui"
    },
    {
      "affs": [
        2
      ],
      "name": "Renfei Feng",
      "orcid": "0000-0001-8566-4161"
    },
    {
      "affs": [
        1
      ],
      "name": "Yi Liu"
    },
    {
      "affs": [
        0
      ],
      "name": "Hanxiao Zhang",
      "orcid": "0000-0002-8800-8693"
    },
    {
      "affs": [
        0
      ],
      "name": "Hongbo Zeng",
      "orcid": "0000-0002-1432-5979"
    },
    {
      "affs": [
        0
      ],
      "name": "Xiaolei Wang",
      "orcid": "0000-0002-7751-4849"
    },
    {
      "affs": [
        0,
        3
      ],
      "name": "Jing-Li Luo"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d0gak82veg07m.bib",
  "cited_by": 0,
  "doi": "10.1073/pnas.2611567123",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13715740/",
  "id": "d0gak82veg07m",
  "issns": [
    "0027-8424",
    "1091-6490"
  ],
  "landing_url": "https://doi.org/10.1073/pnas.2611567123",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "410"
    ],
    [
      "heading",
      "Chemistry"
    ],
    [
      "heading",
      "Physical Sciences"
    ],
    [
      "openalex",
      "2105|Advanced Photocatalysis Techniques"
    ]
  ],
  "openalex": "W7223213951",
  "pdf_url": null,
  "pmcid": "PMC13715740",
  "pmid": "42911859",
  "published": "2026-10-22",
  "publisher": "National Academy of Sciences",
  "ris": "https://research.draconitic.com/paper/d0gak82veg07m.ris",
  "sources": [
    {
      "first_seen": "2026-11-01T12:22:57Z",
      "native_id": "PMC13715740",
      "source": "pmc",
      "url": "https://doi.org/10.1073/pnas.2611567123"
    }
  ],
  "subjects": [
    {
      "field": "biochemistry",
      "origin": "journal-openalex:1312|Genomics and Chromatin Dynamics",
      "subfield": "molecular-biology"
    }
  ],
  "title": "Mechanistic insight into conflicting valence fluctuation of Cu(I) photocorrosion pathways: The role of charge behaviors",
  "title_text": "Mechanistic insight into conflicting valence fluctuation of Cu(I) photocorrosion pathways: The role of charge behaviors",
  "type": "peer-reviewed",
  "updated_at": "2026-11-01T12:22:57Z",
  "url": "https://research.draconitic.com/paper/d0gak82veg07m",
  "venue": "Proceedings of the National Academy of Sciences of the United States of America",
  "versions": []
}