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Here, we report a hydrogen\u2010bonded porphyrin framework with atomically dispersed Cu sites (SACu\u2010GTUB5) that enables efficient Cl\n                    <jats:sub>2<\/jats:sub>\n                    storage and accelerates Cl\n                    <jats:sub>2<\/jats:sub>\n                    \/Cl\n                    <jats:sup>\u2212<\/jats:sup>\n                    conversion. The intrinsic porosity of the framework combined with chemically active Cu\u2500N\n                    <jats:sub>4<\/jats:sub>\n                    centers enables synergistic physical confinement and chemical adsorption of Cl\n                    <jats:sub>2<\/jats:sub>\n                    , effectively suppressing Cl\n                    <jats:sub>2<\/jats:sub>\n                    escape and improving Coulombic efficiency. As a result, the SACu\u2010GTUB5\u2010based H\n                    <jats:sub>2<\/jats:sub>\n                    \u2500Cl\n                    <jats:sub>2<\/jats:sub>\n                    battery exhibits stable operation across a wide temperature range (\u221240\u00b0C to 60\u00b0C) and achieves a high areal discharge capacity of 2.55\u00a0mAh cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    over 300 cycles. Spectroscopic analyses combined with density functional theory calculations reveal that Cu\u2500N\n                    <jats:sub>4<\/jats:sub>\n                    sites govern Cl\n                    <jats:sub>2<\/jats:sub>\n                    adsorption, electron redistribution, and reaction pathways, substantially lowering the energy barriers for Cl\n                    <jats:sub>2<\/jats:sub>\n                    reduction. This work establishes an atomic\u2010level interfacial regulation strategy for controlling halogen redox chemistry in electrochemical energy storage.\n                  <\/jats:p>","DOI":"10.1002\/anie.5210125","type":"journal-article","created":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T12:13:59Z","timestamp":1784636039000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Atomic\u2013Level Interfacial Regulation Enables Efficient Chlorine Redox Chemistry in Rechargeable H\n                    <sub>2<\/sub>\n                    \u2500Cl\n                    <sub>2<\/sub>\n                    Batteries"],"prefix":"10.1002","volume":"65","author":[{"given":"Yingnan","family":"Cao","sequence":"first","affiliation":[{"name":"Department of Environmental Science Zhejiang University  Hangzhou P. R. China"},{"name":"State Key Laboratory of Soil Pollution Control and Safety Zhejiang University  Hangzhou P. R. China"},{"name":"Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Zhejiang University  Hangzhou Zhejiang P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenzhen","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering Adelaide University  Adelaide SA Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ziang","family":"Lv","sequence":"additional","affiliation":[{"name":"Department of Environmental Science Zhejiang University  Hangzhou P. R. China"},{"name":"State Key Laboratory of Soil Pollution Control and Safety Zhejiang University  Hangzhou P. R. China"},{"name":"Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Zhejiang University  Hangzhou Zhejiang P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xu","family":"Ma","sequence":"additional","affiliation":[{"name":"Department of Environmental Science Zhejiang University  Hangzhou P. R. China"},{"name":"State Key Laboratory of Soil Pollution Control and Safety Zhejiang University  Hangzhou P. R. China"},{"name":"Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Zhejiang University  Hangzhou Zhejiang P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weigao","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Environmental Science Zhejiang University  Hangzhou P. R. China"},{"name":"State Key Laboratory of Soil Pollution Control and Safety Zhejiang University  Hangzhou P. R. China"},{"name":"Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Zhejiang University  Hangzhou Zhejiang P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8196-081X","authenticated-orcid":false,"given":"Baoliang","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Environmental Science Zhejiang University  Hangzhou P. R. China"},{"name":"State Key Laboratory of Soil Pollution Control and Safety Zhejiang University  Hangzhou P. R. China"},{"name":"Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Zhejiang University  Hangzhou Zhejiang P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-2690-1902","authenticated-orcid":false,"given":"Chaofei","family":"Guo","sequence":"additional","affiliation":[{"name":"College of Chemistry and Materials Engineering Zhejiang A&amp;F University  Hangzhou Zhejiang P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3489-7672","authenticated-orcid":false,"given":"Yong","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering School of Environmental and Chemical Engineering Shanghai University  Shanghai P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8800-0934","authenticated-orcid":false,"given":"Kaijie","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Environmental Science Zhejiang University  Hangzhou P. R. China"},{"name":"State Key Laboratory of Soil Pollution Control and Safety Zhejiang University  Hangzhou P. R. China"},{"name":"Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Zhejiang University  Hangzhou Zhejiang P. R. 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