{
  "abstract": "Performing direct CO2 reduction reaction (CO2RR) from flue gas streams containing low-concentrated CO2 (4 – 25% v/v) represents an opportunity to obtain added value products while reducing anthropogenic emissions. The heterogenization of molecular complexes offers a pathway to scale up CO2RR systems, especially under CO2 diluted conditions where reactant is mass transport limited and competitive hydrogen evolution reaction (HER) might be boosted. In this work, a formate-selective rhodium complex ([Rh(bpy’)(Cp*)Cl]Cl, where bpy’ = 4-(2-propyn-1-yloxymethyl)-4’-methyl-2,2’-bipyridine and Cp* = pentamethylcyclopentadienyl, is immobilized at high loading within tridimensional (3D) vertically-aligned mesoporous silica films (VAMSF) electrochemically grown on glassy carbon electrodes. The resulting modified 3D-electrodes allow direct CO2RR under both pure and diluted (10% v/v) CO2 streams remaining selective for formate production in both organic and aqueous media and minimizing the contribution of HER from the support. In acetonitrile/1%H2O, faradaic efficiencies (FE) for formate production of 66% in 100% CO2 and 47% in 10% CO2 were achieved, while in KHCO3 (pH= 6.8), FE of 47% and 43% were reached under pure and diluted CO2 streams, respectively. Finally, in a more acidic aqueous solution (pH= 3.8) FE of 59% was achieved under pure CO2. The electrodes work without pre-activation or auxiliary overlayers, and show recyclability and stability over multiple electrolysis cycles, indicating no structural degradation under operation conditions. To our knowledge, this is the first formate-selective heterogenized molecular complex, tested under a diluted CO2 gas stream. These results point VAMSF as an attractive platform to bring molecular CO2RR catalysis closer to realistic applications.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "name": "Yutzil Segura-Ramirez"
    },
    {
      "name": "Neus Vilà"
    },
    {
      "name": "Alain Walcarius"
    },
    {
      "name": "Marc Fontecave"
    },
    {
      "name": "Carlos Sánchez-Sánchez"
    },
    {
      "name": "Maria Gómez-Mingot"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/382ak7tzxq2w1.bib",
  "cited_by": 0,
  "doi": "10.1021/jacs.5c22009",
  "fulltext_url": null,
  "id": "382ak7tzxq2w1",
  "issns": [
    "0002-7863",
    "1520-5126"
  ],
  "landing_url": "https://hal.science/hal-05762344v1",
  "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|CO2 Reduction Techniques and Catalysts"
    ]
  ],
  "openalex": "W7165536018",
  "pdf_url": "https://hal.science/hal-05762344/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-22",
  "publisher": "American Chemical Society",
  "ris": "https://research.draconitic.com/paper/382ak7tzxq2w1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:40Z",
      "native_id": "hal-05762344",
      "source": "hal",
      "url": "https://hal.science/hal-05762344v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "journal-openalex:1605|Chemical Reaction Mechanisms",
      "subfield": "organic"
    }
  ],
  "title": "Surface-Immobilized Rhodium Complex in Vertically Aligned Mesoporous Silica Films for Direct Electroreduction of Diluted CO 2",
  "title_text": "Surface-Immobilized Rhodium Complex in Vertically Aligned Mesoporous Silica Films for Direct Electroreduction of Diluted CO 2",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:40Z",
  "url": "https://research.draconitic.com/paper/382ak7tzxq2w1",
  "venue": "Journal of the American Chemical Society",
  "versions": []
}