{
  "abstract": "Selective electrochemical conversion of nitrate (NO 3 - ) to dinitrogen (N 2 ) is attractive for nitrate remediation but remains challenging because competing hydrogenation pathways often yield reduced nitrogen products. Here, we develop a self-supported flexible electrified membrane (α-Co/NC@CNTFEM) by integrating phase-defined hexagonal close-packed (HCP) α-Co/nitrogen-doped carbon (NC) into a conductive carbon nanotube (CNT) framework. The resulting membrane combines a uniformly integrated catalytic phase with a thin, interconnected porous architecture suitable for flow-through electrochemical operation. At an initial nitrate concentration of 10 mg L -1 , α-Co/NC@CNT-FEM achieves 96.5% nitrate conversion, 81.5% N 2 Faradaic efficiency, and 97.9% N 2 selectivity, exceeding the corresponding mixed-phase Co NP /NC@CNT-FEM and bare CNT-FEM. The enhanced N 2 selectivity is associated with the coupled effects of the phase-defined α-Co, N-doped carbon matrix, and flow-through CNT microenvironment, which may favor N–N coupling while suppressing excessive hydrogenation. Moreover, our results also reveal that stable nitrate removal on this platform is maintained over 10 consecutive cycles. This work demonstrates crystal-phase engineering coupled with electrified membrane design as a materials strategy for selective nitrate-to-N 2 conversion.",
  "abstract_shown": true,
  "affiliations": [
    "School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, 219 Ningliu Road, Nanjing, China, 210044",
    "NUIST Reading Academy, Nanjing University of Information Science and Technology, 219 Ningliu Road, Nanjing, China, 210044"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Jiantao Xu"
    },
    {
      "affs": [
        0
      ],
      "name": "Ruxin Han"
    },
    {
      "affs": [
        0
      ],
      "name": "Jifa Zhang"
    },
    {
      "affs": [
        0
      ],
      "name": "Dawei Li"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Feihu Li",
      "orcid": "0000-0002-2969-8276"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/eavgvtea6syan.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15009859/v1",
  "fulltext_url": null,
  "id": "eavgvtea6syan",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009859/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",
      "1503|Ammonia Synthesis and Nitrogen Reduction"
    ]
  ],
  "openalex": "W7220386533",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15009859/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-05",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/eavgvtea6syan.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "10.26434/chemrxiv.15009859",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009859/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1503|Ammonia Synthesis and Nitrogen Reduction",
      "subfield": "catalysis"
    }
  ],
  "title": "Phase-Controlled Efficient Nitrate-to-Dinitrogen Electroreduction on an α-Co/NC@CNT Electrified Membrane Platform",
  "title_text": "Phase-Controlled Efficient Nitrate-to-Dinitrogen Electroreduction on an α-Co/NC@CNT Electrified Membrane Platform",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:22Z",
  "url": "https://research.draconitic.com/paper/eavgvtea6syan",
  "venue": "ChemRxiv",
  "versions": []
}