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Benefiting from the synergistic strategy of Cu single atoms and In\n                    <jats:sup>3+<\/jats:sup>\n                    \u2010O\n                    <jats:sub>V<\/jats:sub>\n                    , CO\n                    <jats:sub>2<\/jats:sub>\n                    molecules were activated, the energy barrier for the formation of the\n                    <jats:sup>*<\/jats:sup>\n                    COOH intermediates was lowered, and the CO yield is increased to 17.24\u00a0\u00b5mol\u00a0g\n                    <jats:sup>\u22121<\/jats:sup>\n                    \u00a0h\n                    <jats:sup>\u22121<\/jats:sup>\n                    with near\u2010unity selectivity (&gt;99%). Moreover, Cu\/In\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>3<\/jats:sub>\n                    \u2010Ns photocatalysts demonstrate exceptional stability over extended cycling tests (64\u00a0h). In situ spectral characterization and DFT calculations reveal that the engineered two\u2010dimensional ultrathin In\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>3<\/jats:sub>\n                    \u2010Ns structures demonstrate significant advantages in promoting CO\n                    <jats:sub>2<\/jats:sub>\n                    enrichment and confining key reaction intermediates following the anchoring of Cu single atoms, thereby substantially enhancing the surface coverage of\n                    <jats:sup>*<\/jats:sup>\n                    COOH species. Cu single atoms and In\n                    <jats:sup>3+<\/jats:sup>\n                    \u2010O\n                    <jats:sub>V<\/jats:sub>\n                    sites synergistically promote\n                    <jats:sup>*<\/jats:sup>\n                    CO\n                    <jats:sub>2<\/jats:sub>\n                    adsorption,\n                    <jats:sup>*<\/jats:sup>\n                    COOH formation\/desorption, and accelerate the transfer of photoexcited charge carriers between In\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>3<\/jats:sub>\n                    matrix and Cu single atoms. This cooperative mechanism significantly enhances both the photocatalytic CO\n                    <jats:sub>2<\/jats:sub>\n                    reduction activity and CO selectivity. This work provides a novel strategy for constructing precisely tailored active sites in photocatalysts and offers fundamental insights into boosting the efficiency and selectivity of photocatalytic CO\n                    <jats:sub>2<\/jats:sub>\n                    conversion.\n                  <\/jats:p>","DOI":"10.1002\/advs.77464","type":"journal-article","created":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T02:26:19Z","timestamp":1788143179000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ultrathin 2D In\n                    <sub>2<\/sub>\n                    O\n                    <sub>3<\/sub>\n                    Nanosheets Confining Cu Single Atoms Synergized With Oxygen Vacancies for High Selectivity of Photocatalytic Reduction of CO\n                    <sub>2<\/sub>\n                    to CO"],"prefix":"10.1002","author":[{"given":"Yueying","family":"Yang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Disaster Prevention and Ecology Protection in Open\u2010pit Coal Mines Shandong Key Laboratory of Special Epoxy Resin School of Materials Science and Engineering Shandong University of Science and Technology  Qingdao China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xuan","family":"Xiang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Disaster Prevention and Ecology Protection in Open\u2010pit Coal Mines Shandong Key Laboratory of Special Epoxy Resin School of Materials Science and Engineering Shandong University of Science and Technology  Qingdao China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiali","family":"Ren","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Disaster Prevention and Ecology Protection in Open\u2010pit Coal Mines Shandong Key Laboratory of Special Epoxy Resin School of Materials Science and Engineering Shandong University of Science and Technology  Qingdao China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying","family":"Bian","sequence":"additional","affiliation":[{"name":"Dongying Vocational College  Dongying China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7350-423X","authenticated-orcid":false,"given":"Xinyu","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Disaster Prevention and Ecology Protection in Open\u2010pit Coal Mines Shandong Key Laboratory of Special Epoxy Resin School of Materials Science and Engineering Shandong University of Science and Technology  Qingdao China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyang","family":"Lu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Disaster Prevention and Ecology Protection in Open\u2010pit Coal Mines 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