{
  "abstract": "Electrocatalytic nitrate reduction reaction (NO₃RR) represents a sustainable route for both ammonia (NH₃) production and nitrate-contaminated water remediation, yet its practical application is crippled by the kinetically sluggish multi-electron/proton transfer and insufficient targeted active hydrogen (*H) supply. Herein, a Pd-doped CuCo₂O₄ (Pd-CuCo₂O₄) hollow spiny microsphere catalyst is designed to tackle this challenge via a synergistic relay catalysis mechanism coupled with rapid *H replenishment. Kinetics studies and theoretical calculations collectively demonstrate a clear tandem pathway for NH₃ synthesis: NO₃ ⁻ is preferentially reduced to NO₂ ⁻ on Cu sites, and then migrates to neighboring Co sites for further conversion to NH₃. Crucially, the incorporated Pd dopants promote NO₃ ⁻ adsorption on Cu sites and *H generation on Co sites precisely. The efficient *H supply and co-adsorption for intermediates eliminates the intrinsic kinetic bottleneck of poor *H-NOx coupling, ensuring the tandem catalysis proceeds smoothly without interruption. Benefiting from the *H-spillover boosted relay mechanism, an ultra-high current density over -2.0 A cm⁻² and a remarkable NH₃ yield rate of 100.43 mg h⁻¹ cm⁻² are achieved. This study underscores the synergistic interplay among the three active sites and provides a blueprint for designing high-rate, practical NO₃RR electrocatalysts.",
  "abstract_shown": true,
  "affiliations": [
    "Hebei Key Laboratory of Analytical Science and Technology, and College of Chemistry and Materials Science, Hebei University, Baoding, People's Republic of China.",
    "Key Laboratory of Automobile Materials, Ministry of Education, and School of Materials Science and Engineering, Jilin University, Changchun, People's Republic of China.",
    "Institutes of Physical Science and Information Technology, Anhui University, Hefei, People's Republic of China."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Yuhuan Cui",
      "orcid": "0009-0008-2242-7351"
    },
    {
      "affs": [
        0
      ],
      "name": "Yingying Xu"
    },
    {
      "affs": [
        0
      ],
      "name": "Jingyao Guo"
    },
    {
      "affs": [
        0
      ],
      "name": "Yao Liu"
    },
    {
      "affs": [
        0
      ],
      "name": "Yuxuan Li"
    },
    {
      "affs": [
        1
      ],
      "name": "Zixuan Feng"
    },
    {
      "affs": [
        2
      ],
      "name": "Yitong Zhou"
    },
    {
      "affs": [
        0
      ],
      "name": "Yongjun Gao",
      "orcid": "0000-0003-2059-3168"
    },
    {
      "affs": [
        1
      ],
      "name": "Zhili Wang",
      "orcid": "0000-0002-1667-3360"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5psmrdtw6k154.bib",
  "cited_by": 0,
  "doi": "10.1002/advs.78576",
  "fulltext_url": "https://europepmc.org/articles/PMC13720387",
  "id": "5psmrdtw6k154",
  "issns": [
    "2198-3844"
  ],
  "landing_url": "https://europepmc.org/article/MED/42958761",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Research Article"
    ],
    [
      "openalex",
      "1503|Ammonia Synthesis and Nitrogen Reduction"
    ]
  ],
  "openalex": "W7224957282",
  "pdf_url": "https://europepmc.org/articles/PMC13720387?pdf=render",
  "pmcid": "PMC13720387",
  "pmid": "42958761",
  "published": "2026-10-29",
  "publisher": "Wiley",
  "ris": "https://research.draconitic.com/paper/5psmrdtw6k154.ris",
  "sources": [
    {
      "first_seen": "2026-11-01T00:20:36Z",
      "native_id": "MED:42958761",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42958761"
    },
    {
      "first_seen": "2026-11-03T12:21:16Z",
      "native_id": "PMC13720387",
      "source": "pmc",
      "url": "https://doi.org/10.1002/advs.78576"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1503|Ammonia Synthesis and Nitrogen Reduction",
      "subfield": "catalysis"
    }
  ],
  "title": "Overcoming the *H-NOx Coupling Bottleneck via Palladium-Enabled Relay Catalysis on CuCo₂O₄ Toward Ampere-Level Nitrate-to-Ammonia.",
  "title_text": "Overcoming the *H-NOx Coupling Bottleneck via Palladium-Enabled Relay Catalysis on CuCo₂O₄ Toward Ampere-Level Nitrate-to-Ammonia.",
  "type": "peer-reviewed",
  "updated_at": "2026-11-03T12:21:16Z",
  "url": "https://research.draconitic.com/paper/5psmrdtw6k154",
  "venue": "Advanced science (Weinheim, Baden-Wurttemberg, Germany)",
  "versions": []
}