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Heterostructures coupling non\u2010noble transition metal oxides (TMOs) with carbon materials hold promise for 2e\n                    <jats:sup>\u2212<\/jats:sup>\n                    ORR, but face challenges in controlling morphology, phase composition, and active centers. In this study, a hierarchically porous tremella\u2010like heterojunction characterized by ultrafine cubic Fe\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    nanoparticles within the amorphous carbon (UFe\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    @HPAC) is obtained using the integrated platform of green Fe\u2010based deep eutectic solvent via a two\u2010step annealing process. UFe\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    @HPAC exhibits remarkable overall and intrinsic 2e\n                    <jats:sup>\u2212<\/jats:sup>\n                    ORR activity, delivering 96% H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    selectivity and a turnover frequency (TOF) of 67.5 s\n                    <jats:sup>\u22121<\/jats:sup>\n                    . Notably, UFe\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    @HPAC possesses superior H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    production capabilities, showing long\u2010term stability of 100\u00a0h with a H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    production rate of 8.1\u00a0g L\n                    <jats:sup>\u22121<\/jats:sup>\n                    h\n                    <jats:sup>\u22121<\/jats:sup>\n                    in flow\u2010cell, while achieving various medical\u2010grade H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    concentrations (3.0\u20137.8 wt%). Additionally, integrating on\u2010site H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    production with electro\u2010Fenton achieved rapid decomposition of contaminants. The unique heterostructure, with the synergistic effect of Fe\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    and amorphous carbon, enhances electronic conductivity. Moreover, the electronic redistribution at the interface of the heterostructure triggers the thermodynamically favorable multiple active sites of Fe and C centers for the 2e\n                    <jats:sup>\u2212<\/jats:sup>\n                    ORR. This work offers a new perspective on transition metal\u2010based materials for H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    production.\n                  <\/jats:p>","DOI":"10.1002\/advs.202502388","type":"journal-article","created":{"date-parts":[[2025,5,19]],"date-time":"2025-05-19T06:52:37Z","timestamp":1747637557000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Heterostructure of Fe\n                    <sub>3<\/sub>\n                    O\n                    <sub>4<\/sub>\n                    Confined in Hierarchical Porous Carbon for Interface\u2010Enhanced Medical\u2010Grade H\n                    <sub>2<\/sub>\n                    O\n                    <sub>2<\/sub>\n                    Electrosynthesis"],"prefix":"10.1002","volume":"12","author":[{"given":"Yanan","family":"Shi","sequence":"first","affiliation":[{"name":"Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical Engineering Zhengzhou University  Zhengzhou 450001 China"},{"name":"State Key Laboratory of Coking Coal Resources Green Exploitation Zhengzhou University  Zhengzhou 450001 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li\u2010Li","family":"Zhang","sequence":"additional","affiliation":[{"name":"Interdisciplinary Research Center for Sustainable Energy Science and Engineering (IRC4SE<sup>2<\/sup>) School of Chemical Engineering Zhengzhou University  Zhengzhou 450001 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chongyang","family":"Wang","sequence":"additional","affiliation":[{"name":"Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical Engineering Zhengzhou University  Zhengzhou 450001 China"},{"name":"State Key Laboratory of Coking Coal Resources Green Exploitation Zhengzhou University  Zhengzhou 450001 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6780-5079","authenticated-orcid":false,"given":"Shaohui","family":"Sun","sequence":"additional","affiliation":[{"name":"Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical Engineering Zhengzhou University  Zhengzhou 450001 China"},{"name":"State Key Laboratory of Coking Coal Resources Green Exploitation Zhengzhou University  Zhengzhou 450001 China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,5,19]]},"reference":[{"key":"e_1_2_7_1_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.4c02031"},{"key":"e_1_2_7_1_2","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202302338"},{"key":"e_1_2_7_1_3","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202411353"},{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40820-023-01067-9"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.1c01003"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202400140"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1039\/D3EE01788E"},{"key":"e_1_2_7_5_2","doi-asserted-by":"publisher","DOI":"10.1021\/acssuschemeng.2c04746"},{"key":"e_1_2_7_5_3","doi-asserted-by":"publisher","DOI":"10.1039\/D3TA06995H"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.201910539"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.checat.2021.10.011"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.2c01829"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jhazmat.2019.121102"},{"key":"e_1_2_7_9_2","doi-asserted-by":"publisher","DOI":"10.1039\/D2TA05838C"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1039\/D4EE05796A"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/advs.202002249"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2021.133597"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2024.148762"},{"key":"e_1_2_7_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.apcatb.2023.122721"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ces.2023.119460"},{"key":"e_1_2_7_14_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41929-018-0044-2"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.1c01638"},{"key":"e_1_2_7_15_2","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202005834"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2020.125681"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2EE00548D"},{"key":"e_1_2_7_18_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202202248"},{"key":"e_1_2_7_18_2","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202203510"},{"key":"e_1_2_7_18_3","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202104716"},{"key":"e_1_2_7_18_4","doi-asserted-by":"publisher","DOI":"10.1016\/j.chempr.2021.08.007"},{"key":"e_1_2_7_18_5","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202307355"},{"key":"e_1_2_7_18_6","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-023-35839-z"},{"key":"e_1_2_7_19_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.4c03104"},{"key":"e_1_2_7_20_1","volume":"146","author":"Ni 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