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Herein, Ba(Zr\n                    <jats:sub>x<\/jats:sub>\n                    Cu\n                    <jats:sub>y<\/jats:sub>\n                    Co\n                    <jats:sub>1\u2010x\u2010y<\/jats:sub>\n                    )O\n                    <jats:sub>3\u2010\u03b4<\/jats:sub>\n                    (BZCC), a novel mixed\u2010metal perovskite synthesized is introduced via a low\u2010temperature hydrothermal method, which integrates multiple catalytic functionalities for efficient OER in alkaline media. The catalyst simultaneously activates the adsorbate evolution mechanism (AEM) and the lattice oxygen oxidation mechanism (LOM), driven by the redox flexibility of Co\n                    <jats:sup>3+<\/jats:sup>\n                    \/Co\n                    <jats:sup>4+<\/jats:sup>\n                    . The incorporation of Cu\n                    <jats:sup>2+<\/jats:sup>\n                    \/Cu\n                    <jats:sup>3+<\/jats:sup>\n                    modulates the electronic structure to enhance intrinsic activity, while Zr\n                    <jats:sup>4+<\/jats:sup>\n                    contributes to structural robustness against alkaline corrosion. The generation of oxygen vacancies (\u03b4) through Cu\/Co redox cycling, stabilized by Zr\n                    <jats:sup>4+<\/jats:sup>\n                    , facilitates OH\n                    <jats:sup>\u2212<\/jats:sup>\n                    adsorption and promotes continuous O\n                    <jats:sub>2<\/jats:sub>\n                    evolution. BZCC delivers a low overpotential of 238 mV at 10 mA cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    and demonstrates excellent durability, showing only a 116 mV increase in operating potential after 200 h. When applied in a single\u2010cell anion exchange membrane water electrolyzer (AEMWE), the BZCC\u2010based anode achieves a current density of 1.0 A cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    at 2.07 V, maintaining stable operation without performance degradation over 25 h. This combination of redox flexibility, electronic modulation, and structural stability positions BZCC as a scalable, high\u2010performance electrocatalyst for sustainable AEMWE.\n                  <\/jats:p>","DOI":"10.1002\/smll.202509516","type":"journal-article","created":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T07:16:29Z","timestamp":1760426189000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Redox\u2010Engineered Co\u2500Cu\u2500Zr Perovskites for Durable Anion Exchange Membrane Electrolysis"],"prefix":"10.1002","volume":"21","author":[{"given":"Logeshwaran","family":"Natarajan","sequence":"first","affiliation":[{"name":"Carbon Composite Materials Research Center Korea Institute of Science and Technology  92 Chudong\u2010ro, Bongdong\u2010eup Wanju\u2010gun Jeonbuk 55324 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ta Thi Thuy","family":"Nga","sequence":"additional","affiliation":[{"name":"Department of Physics Tamkang University  New Taipei City 25137 Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Minjae","family":"Kwon","sequence":"additional","affiliation":[{"name":"Carbon Composite Materials Research Center Korea Institute of Science and Technology  92 Chudong\u2010ro, Bongdong\u2010eup Wanju\u2010gun Jeonbuk 55324 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pandian","family":"Mannu","sequence":"additional","affiliation":[{"name":"Department of Physics Tamkang University  New Taipei City 25137 Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4289-4677","authenticated-orcid":false,"given":"Chung\u2010Li","family":"Dong","sequence":"additional","affiliation":[{"name":"Department of Physics Tamkang University  New Taipei City 25137 Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sungho","family":"Lee","sequence":"additional","affiliation":[{"name":"Carbon Composite Materials Research Center Korea Institute of Science and Technology  92 Chudong\u2010ro, Bongdong\u2010eup Wanju\u2010gun Jeonbuk 55324 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5707-3361","authenticated-orcid":false,"given":"Dong Jin","family":"Yoo","sequence":"additional","affiliation":[{"name":"Department of Life Science, Department of Energy Storage\/Conversion Engineering (BK21 FOUR) of Graduate School, and Hydrogen and Fuel Cell Research Center Jeonbuk National University  567 Baekje\u2010daero, Deokjin\u2010gu Jeonju\u2010si Jeollabuk\u2010do 54896 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6406-890X","authenticated-orcid":false,"given":"Young Jun","family":"Lee","sequence":"additional","affiliation":[{"name":"Carbon Composite Materials Research Center Korea Institute of Science and Technology  92 Chudong\u2010ro, Bongdong\u2010eup Wanju\u2010gun Jeonbuk 55324 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,10,14]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202103517"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemmater.5c00103"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/aenm.202501800"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202404239"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/smtd.202400284"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41929-024-01238-w"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.1c04117"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.5c06156"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1002\/smtd.202100834"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2CS00038E"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.apcatb.2025.125393"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/aenm.202203401"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201502024"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.201901783"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms14586"},{"key":"e_1_2_8_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.nanoen.2022.107344"},{"key":"e_1_2_8_17_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsenergylett.2c02617"},{"key":"e_1_2_8_18_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms11053"},{"key":"e_1_2_8_19_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.8b02712"},{"key":"e_1_2_8_20_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1212858"},{"key":"e_1_2_8_21_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201408998"},{"key":"e_1_2_8_22_1","doi-asserted-by":"publisher","DOI":"10.1039\/C8TA05599H"},{"key":"e_1_2_8_23_1","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.aav6262"},{"key":"e_1_2_8_24_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202101605"},{"key":"e_1_2_8_25_1","doi-asserted-by":"publisher","DOI":"10.1002\/aenm.202000459"},{"key":"e_1_2_8_26_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsaem.3c01760"},{"key":"e_1_2_8_27_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ceramint.2022.07.303"},{"key":"e_1_2_8_28_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202101605"},{"key":"e_1_2_8_29_1","doi-asserted-by":"publisher","DOI":"10.1038\/nmat4938"},{"key":"e_1_2_8_30_1","doi-asserted-by":"publisher","DOI":"10.1149\/1.3494119"},{"key":"e_1_2_8_31_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ceramint.2020.12.054"},{"key":"e_1_2_8_32_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.tsf.2019.04.042"},{"key":"e_1_2_8_33_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202406627"},{"key":"e_1_2_8_34_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.jpcc.3c00929"},{"key":"e_1_2_8_35_1","doi-asserted-by":"publisher","DOI":"10.1039\/C9CP03322J"},{"key":"e_1_2_8_36_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsomega.7b01655"},{"key":"e_1_2_8_37_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10853-018-2995-8"},{"key":"e_1_2_8_38_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.9b02408"},{"key":"e_1_2_8_39_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.elspec.2021.147106"},{"key":"e_1_2_8_40_1","doi-asserted-by":"publisher","DOI":"10.1016\/0921-4526(89)90352-9"},{"key":"e_1_2_8_41_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.matlet.2017.10.114"},{"key":"e_1_2_8_42_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.jpcc.1c10284"},{"key":"e_1_2_8_43_1","doi-asserted-by":"publisher","DOI":"10.1039\/D1SC06555F"},{"key":"e_1_2_8_44_1","doi-asserted-by":"publisher","DOI":"10.1038\/srep43791"},{"key":"e_1_2_8_45_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsami.3c10296"},{"key":"e_1_2_8_46_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202305077"},{"key":"e_1_2_8_47_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202212329"},{"key":"e_1_2_8_48_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.apcatb.2021.120488"},{"key":"e_1_2_8_49_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.apcatb.2022.121132"},{"key":"e_1_2_8_50_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2024.151322"},{"key":"e_1_2_8_51_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2RA07901A"},{"key":"e_1_2_8_52_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.7b02650"},{"key":"e_1_2_8_53_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.enrev.2025.100139"},{"key":"e_1_2_8_54_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202100129"},{"key":"e_1_2_8_55_1","doi-asserted-by":"publisher","DOI":"10.1039\/D0TA04362A"},{"key":"e_1_2_8_56_1","doi-asserted-by":"publisher","DOI":"10.1039\/C9TA01404G"},{"key":"e_1_2_8_57_1","doi-asserted-by":"publisher","DOI"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