{
  "abstract": "MgH 2 is favored for its high hydrogen storage density (7.6 wt.%), however, its practical application is hindered by stable thermodynamics and sluggish kinetics. Although the introduction of highly active catalysts effectively improves the kinetic performance of MgH 2 , the catalytic mechanism of complex multiphase catalysts remains poorly understood, posing formidable challenges to the rational design of truly reversible catalysts. In this study, a highly-effective reversible catalyst Ni 9 S 8 /Fe 5 Ni 4 S 8 was constructed to extremely enhance both the hydrogen desorption and regeneration capability of MgH 2 . Remarkably, at a mild temperature of 225 °C, MgH 2 Ni 9 S 8 /Fe 5 Ni 4 S 8 rapidly desorbs 4.13 wt.% H 2 in 3000 s. The composite also efficiently absorbs hydrogen at near-ambient temperatures, absorbing 4.0 wt.% H 2 in 7200 s at 45 °C. In contrast, ball‑milled MgH 2 alone hardly releases any hydrogen at 225 °C and shows almost no hydrogen uptake at 45 °C. Detailed studies revealed that the improved hydrogen ab/desorption behavior of Mg/MgH 2 is attributed to the in-situ generation of catalytically active sites (Fe/Mg 2 Ni heterostructures and “hydrogen pump” of Mg 2 Ni/Mg 2 NiH 4 ) during hydrogen cycling. Density functional theory (DFT) calculations revealed that significant electron transfer at the Fe/Mg 2 Ni heterostructure reduces hydrogen absorption capacity, thereby promoting hydrogen ab/desorption processes in Mg/MgH 2 . Concurrently, the Mg 2 Ni/Mg 2 NiH 4 “hydrogen pump” facilitates H transfer. These findings yield deeper insights into the reversibly catalytic function of multiphase catalysts for enhancing metal hydride hydrogen storage.",
  "abstract_shown": true,
  "affiliations": [
    "College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China",
    "Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Lingying Chen"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Mengran Li"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Yahui Jiao"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Jiguang Zhang",
      "orcid": "0000-0003-4136-1980"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Rui Xia Shi",
      "orcid": "0000-0003-1433-8910"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Yana Liu",
      "orcid": "0000-0002-7642-4219"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Jun Wang",
      "orcid": "0000-0002-5975-542X"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Yunfeng Zhu",
      "orcid": "0000-0001-7483-7629"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ens19771fgckf.bib",
  "cited_by": 5,
  "doi": "10.1016/j.jma.2026.102132",
  "fulltext_url": null,
  "id": "ens19771fgckf",
  "issns": [
    "2213-9567"
  ],
  "landing_url": "https://doi.org/10.1016/j.jma.2026.102132",
  "language": "en",
  "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",
      "2505|Hydrogen Storage and Materials"
    ]
  ],
  "openalex": "W7161742320",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-05-19",
  "publisher": "Elsevier BV",
  "ris": "https://research.draconitic.com/paper/ens19771fgckf.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T13:20:45Z",
      "native_id": "W7161742320",
      "source": "openalex",
      "url": "https://doi.org/10.1016/j.jma.2026.102132"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Hydrogen Storage and Materials",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Ni9S8/Fe5Ni4S8-mediated reversible catalysis: Enhancing the hydrogen storage performance of MgH2 under mild conditions",
  "title_text": "Ni9S8/Fe5Ni4S8-mediated reversible catalysis: Enhancing the hydrogen storage performance of MgH2 under mild conditions",
  "type": "peer-reviewed",
  "updated_at": "2026-11-06T13:20:45Z",
  "url": "https://research.draconitic.com/paper/ens19771fgckf",
  "venue": "Journal of Magnesium and Alloys",
  "versions": []
}