{
  "abstract": "Efficient utilisation of solar UV light ( λ > 300 nm) is essential for practical photocatalytic CO 2 conversion. However, in conventional systems using water as an electron donor, slow water oxidation kinetics present a critical bottleneck that severely limits the CO production rate. Here, we demonstrate an efficient CO 2 conversion system that overcomes this kinetic limitation by employing ammonia as an alternative electron donor over Mg-doped SrTiO 3 loaded with Ag and Fe as dualcocatalysts (Ag–Fe/Mg–SrTiO 3 ). Under UV irradiation ( λ > 300 nm), the optimised photocatalyst achieved a remarkable CO produc on rate exceeding 200 μmol h −1 . Mechanistic investigations revealed that the Fe cocatalyst played a crucial role in promoting ammonia oxidation, facilitating the rapid consumption of photogenerated holes, and significantly enhancing CO 2 conversion activity. Furthermore, nitrite (NO 2 − ) was successfully quantified as the primary oxidation product of ammonia, yielding a calculated e − / h + balance of approximately 1.2, validating the stoichiometric relationship of the reaction. This study offers a promising strategy for simultaneously achieving the upcycling of CO 2 and effective utilisation of ammonia as both an energy source and an electron donor.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemical Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto-daigaku Katsura, Nishikyo-ku, Kyoto, Kyoto, Japan, 615-8510",
    "Fukui Institute for Fundamental Chemistry, Kyoto University, Takano Nishibirakicho 34-4, Sakyo-ku, Kyoto, Japan, 606-8103"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Koki Kajiwara"
    },
    {
      "affs": [
        0
      ],
      "name": "Shoji Iguchi"
    },
    {
      "affs": [
        0
      ],
      "name": "Shimpei Naniwa"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Kentaro Teramura",
      "orcid": "0000-0003-2916-4597"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/83jkns1zc1dnj.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15010290/v1",
  "fulltext_url": null,
  "id": "83jkns1zc1dnj",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010290/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|Advanced Photocatalysis Techniques"
    ]
  ],
  "openalex": "W7221550925",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15010290/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-12",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/83jkns1zc1dnj.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "10.26434/chemrxiv.15010290",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010290/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "Photocatalytic CO ₂ Conversion Driven by UV Light Above 300 nm Using Ammonia as an Electron Donor",
  "title_text": "Photocatalytic CO ₂ Conversion Driven by UV Light Above 300 nm Using Ammonia as an Electron Donor",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:22Z",
  "url": "https://research.draconitic.com/paper/83jkns1zc1dnj",
  "venue": "ChemRxiv",
  "versions": []
}