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Herein, WO\n                    <jats:sub>x<\/jats:sub>\n                    \u2010supported fully exposed Cu clusters (FECCs) confined by hollow mesoporous carbon spheres (HMCS) (Cu\u2010WO\n                    <jats:sub>x<\/jats:sub>\n                    @HMCS) are fabricated through the \u201cmolecular defect confinement\u201d strategy based on the [PW\n                    <jats:sub>9<\/jats:sub>\n                    O\n                    <jats:sub>34<\/jats:sub>\n                    ]\n                    <jats:sup>9\u2212<\/jats:sup>\n                    . The [PW\n                    <jats:sub>9<\/jats:sub>\n                    O\n                    <jats:sub>34<\/jats:sub>\n                    ]\n                    <jats:sup>9\u2212<\/jats:sup>\n                    features a tri\u2010lacunary configuration, single\u2010sided dangling bond characteristics, and excellent liquid\u2010phase stability, enabling precise anchoring of the {Cu\n                    <jats:sup>II<\/jats:sup>\n                    <jats:sub>6<\/jats:sub>\n                    } cluster to realize atomic dispersion at the molecular level, while enabling the controllable construction of the geometric size and electronic structure of FECCs via Cu\u2500O\u2500W bonds during pyrolysis. The Cu\u2010WO\n                    <jats:sub>x<\/jats:sub>\n                    @HMCS executes exceptional performance for CO\n                    <jats:sub>2<\/jats:sub>\n                    \u2010to\u2010ethanol conversion, with Faradaic efficiencies of 80.6% and 75.3% at partial current densities of 322.4 and 677.7\u00a0mA cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    , respectively. Mechanism studies reveal the synergistic regulation: (1) The FECCs display a higher Fermi level compared to Cu nanoparticles, acting as a superior electron donor to promote CO\n                    <jats:sub>2<\/jats:sub>\n                    adsorption and conversion; moreover, the geometric size effect of FECCs increases the\n                    <jats:sup>*<\/jats:sup>\n                    CO coverage, favoring the C\u2500C coupling. (2) The WO\n                    <jats:sub>x<\/jats:sub>\n                    supplies reactive\n                    <jats:sup>*<\/jats:sup>\n                    H, which favors the hydrogenation of\n                    <jats:sup>*<\/jats:sup>\n                    CO and\n                    <jats:sup>*<\/jats:sup>\n                    CHCOH, steering the asymmetric C\u2500C coupling toward ethanol. This study enables atomic\u2010level design of catalysts by employing polyoxometalates, delivering a crucial method for precisely constructing fully exposed clusters and highly selective CO\n                    <jats:sub>2<\/jats:sub>\n                    RR\u2010to\u2010ethanol.\n                  <\/jats:p>","DOI":"10.1002\/adma.75291","type":"journal-article","created":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T12:33:38Z","timestamp":1791203618000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Precise Modulation of CO\n                    <sub>2<\/sub>\n                    \u2010to\u2010Ethanol Conversion by Fully\u2010Exposed Cu\n                    <sub>n<\/sub>\n                    Clusters Induced by Dangling Bonds in Lacunary Polyoxometalate"],"prefix":"10.1002","author":[{"given":"Yunxiu","family":"Zhao","sequence":"first","affiliation":[{"name":"State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical Engineering China University of Petroleum (East China)  Qingdao P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiahui","family":"Bi","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical Engineering China University of Petroleum (East China)  Qingdao P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiyuan","family":"Xu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical Engineering China University of Petroleum (East China)  Qingdao P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Changle","family":"Yue","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical Engineering China University of Petroleum (East China)  Qingdao P. R. 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