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Here, we report a controllable strategy to construct atomically contacted and spatially isolated structures between Pt\n                    <jats:sub>3<\/jats:sub>\n                    clusters and Cu atoms on \u03b3\u2010Al\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>3<\/jats:sub>\n                    by atomic layer deposition (ALD), enabling direct interrogation of metal\u2013metal synergy. By regulating anchoring sites around Pt clusters, Cu atoms can be selectively positioned either by bonding to Pt to form Pt\n                    <jats:sub>3<\/jats:sub>\n                    Cu\n                    <jats:sub>1<\/jats:sub>\n                    clusters or by separating into isolated Cu single atoms. Comprehensive characterizations and theoretical calculations reveal that Cu single atom can act as an effective promoter only when directly bonded to Pt\n                    <jats:sub>3<\/jats:sub>\n                    clusters. As electron donator, the bonded Cu atom can enhance the hydrogen dissociation ability of Pt clusters, weaken their strong acetylene adsorption, and facilitate ethylene desorption, thereby overcoming the activity\u2010selectivity trade\u2010off in selective hydrogenation of trace acetylene. In contrast, isolated Cu single atom fails to promote Pt\n                    <jats:sub>3<\/jats:sub>\n                    clusters and even deteriorate selectivity. These results demonstrate that Pt\u2500Cu bond formation, rather than simple proximity, governs synergistic effects in bimetallic cluster catalysts. This work establishes a clear design principle for atomically engineered catalysts and offers a general strategy to independently optimize catalytic activity and selectivity.\n                  <\/jats:p>","DOI":"10.1002\/anie.4217363","type":"journal-article","created":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T04:08:21Z","timestamp":1790654901000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Atomic Contact With Cu Single Atom Promoting Pt\n                    <sub>3<\/sub>\n                    Clusters for High\u2010Performance Acetylene Semihydrogenation"],"prefix":"10.1002","author":[{"given":"Chuhan","family":"Gao","sequence":"first","affiliation":[{"name":"Interdisciplinary Research Center of Biology &amp; Catalysis School of Life Science and Technology Northwestern Polytechnical University  Xi'an China"},{"name":"School of Chemistry and Chemical Engineering Northwestern Polytechnical University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linsen","family":"Li","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering and Technology Xi'an Jiaotong University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian","family":"Zeng","sequence":"additional","affiliation":[{"name":"Interdisciplinary Research Center of Biology &amp; Catalysis School of Life Science and Technology Northwestern Polytechnical University  Xi'an China"},{"name":"College of Chemistry and Chemical Engineering Taiyuan University of Technology  Taiyuan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiawei","family":"Yao","sequence":"additional","affiliation":[{"name":"Interdisciplinary Research Center of Biology &amp; Catalysis School of Life Science and Technology Northwestern Polytechnical University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0851-8248","authenticated-orcid":false,"given":"Yujing","family":"Ren","sequence":"additional","affiliation":[{"name":"Interdisciplinary Research Center of Biology &amp; Catalysis School of Life Science and Technology Northwestern Polytechnical University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6905-3678","authenticated-orcid":false,"given":"Jianxin","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Taiyuan University of Technology  Taiyuan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6617-8165","authenticated-orcid":false,"given":"Zhao","family":"Jiang","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering and Technology Xi'an Jiaotong University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6202-1929","authenticated-orcid":false,"given":"Yongquan","family":"Qu","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering Northwestern Polytechnical University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3108-0384","authenticated-orcid":false,"given":"Yong","family":"Qin","sequence":"additional","affiliation":[{"name":"College of Materials Science and Engineering Qingdao University of Science and Technology  Qingdao China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huibin","family":"Ge","sequence":"additional","affiliation":[{"name":"Interdisciplinary Research Center of Biology &amp; Catalysis School of Life Science and Technology Northwestern Polytechnical University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,28]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1039\/D4CS01237B"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.5133404"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467\u2010025\u201064886\u2010x"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.0c00190"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.2c05498"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202215225"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.4c04462"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1021\/acscatal.9b02840"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2023.147496"},{"key":"e_1_2_8_11_1","doi-asserted-by":"crossref","DOI":"10.1016\/j.cej.2025.164020","article-title":"Study on the Modifying Effect of Cobalt in Pd\u2010Co\/\u03b1\u2010Al2O3 Catalysts for Ethylene Production by Acetylene Hydrogenation","volume":"516","author":"Yurpalova D. 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