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While low\u2010dimensional (0\u20132D) topological inorganic electrides have garnered considerable attention, their three\u2010dimensional (3D) counterparts\u2014featuring intricate interstitial electron networks\u2014remain entirely uncharted territory. Herein, the identification of twelve 3D inorganic electrides within the rare\u2010earth hydride family is reported, nine of which are previously unreported. First\u2010principles calculations reveal a diverse magnetic landscape: two systems exhibit ferromagnetic ordering, while seven demonstrate antiferromagnetic configurations. Strikingly, these materials host rich topological states, encompassing nodal points, nodal lines, and associated surface signatures such as Fermi arcs and drumhead\u2010like states. When spin\u2010orbit coupling is introduced, the magnetic ordering breaks time\u2010reversal symmetry, thereby generating substantial Berry curvature and resulting in a relatively large anomalous Hall conductivity (939 S\u00a0cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    ). Furthermore, these inorganic electrides exhibit ultralow work functions (2.6\u20133.9\u00a0eV) on rare\u2010earth\u2010terminated surfaces. Under external electric fields, the 3D interstitial electrons migrate to the surface, forming a quasi\u20102D electron gas. Significantly, such low work functions can effectively activate N\n                    <jats:sub>2<\/jats:sub>\n                    , enhancing catalytic NH\n                    <jats:sub>3<\/jats:sub>\n                    synthesis. These findings establish an ideal platform to explore 3D inorganic electrides, along with their topological features, anomalous transport phenomena, low work functions, and NH\n                    <jats:sub>3<\/jats:sub>\n                    synthesis.\n                  <\/jats:p>","DOI":"10.1002\/advs.202507469","type":"journal-article","created":{"date-parts":[[2025,7,3]],"date-time":"2025-07-03T04:43:58Z","timestamp":1751517838000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["3D Topological Inorganic Electrides: Screening, Properties, and Applications"],"prefix":"10.1002","volume":"12","author":[{"given":"Zhenzhou","family":"Guo","sequence":"first","affiliation":[{"name":"College of Physics Hebei Key Laboratory of Photophysics Research and Application Hebei Normal University  Shijiazhuang 050024 China"},{"name":"Institute for Superconducting and Electronic Materials (ISEM) Faculty of Engineering and Information Sciences University of Wollongong  Wollongong New South Wales 2500 Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4913-0928","authenticated-orcid":false,"given":"Weizhen","family":"Meng","sequence":"additional","affiliation":[{"name":"College of Physics Hebei Key Laboratory of Photophysics Research and Application Hebei Normal University  Shijiazhuang 050024 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qianwen","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Physical Science and Technology Southwest University  Chongqing 400715 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xia","family":"Cheng","sequence":"additional","affiliation":[{"name":"School of Physical Science and Technology Southwest University  Chongqing 400715 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shiyao","family":"Wang","sequence":"additional","affiliation":[{"name":"MDX Research Center for Element Strategy Institute of Integrated Research Institute of Science Tokyo  Yokohama 226\u20108503 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yalong","family":"Jiao","sequence":"additional","affiliation":[{"name":"College of Physics Hebei Key Laboratory of Photophysics Research and Application Hebei Normal University  Shijiazhuang 050024 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoming","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Physical Science and Technology Southwest University  Chongqing 400715 China"},{"name":"State Key Laboratory of Reliability and Intelligence of Electrical Equipment, and School of Materials Science and Engineering Hebei University of Technology  Tianjin 300130 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