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However, their chemical stability and massive accumulation arouse severe environmental issues, necessitating urgent resolution of recycling. Current recycling strategies encounter challenges like noble metal catalyst dependence, harsh conditions, sensitivity, poor selectivity, and low\u2010valued products. Here, we report a potentially sustainable and scalable tandem dehydrogenation\u2013oxidation system that operates under mild conditions (120\u00a0\u00b0C, in air) without precious metals. With 1,1,2\u2010C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>3<\/jats:sub>\n                    Cl\n                    <jats:sub>3<\/jats:sub>\n                    serving as both the solvent and chlorine radical source, polyolefins, and mixed polyethylene wastes can be efficiently converted into \u03b1,\u03c9\u2010functional wax under the combined action of H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    and phase\u2010transfer catalyst (CP)\n                    <jats:sub>3<\/jats:sub>\n                    PW\n                    <jats:sub>4<\/jats:sub>\n                    O\n                    <jats:sub>16<\/jats:sub>\n                    with &gt;95% carbon utilization efficiency. The process is tolerant to water, oxygen, and common plastic additives, eliminating pre\u2011purification. This work offers an economically promising and potentially scalable pathway for polyolefin waste upcycling.\n                  <\/jats:p>","DOI":"10.1002\/anie.5803210","type":"journal-article","created":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T15:52:55Z","timestamp":1786636375000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Chlorine Radical Mediated Tandem Dehydrogenation\u2013Oxidation for Upcycling Polyolefins to Functional Wax at Low Temperature in Air"],"prefix":"10.1002","volume":"65","author":[{"given":"Tianhao","family":"Nan","sequence":"first","affiliation":[{"name":"State Key Laboratory of Polymer Science and Technology Changchun Institute of Applied Chemistry Chinese Academy of Sciences  Changchun China"},{"name":"School of Applied Chemistry and Engineering University of Science and Technology of China  Hefei China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8676-4794","authenticated-orcid":false,"given":"Bo","family":"Liu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Science and Technology Changchun Institute of Applied Chemistry Chinese Academy of Sciences  Changchun China"},{"name":"School of Applied Chemistry and Engineering University of Science and Technology of China  Hefei China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuxin","family":"Liang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Science and Technology Changchun Institute of Applied Chemistry Chinese Academy of Sciences  Changchun China"},{"name":"School of Applied Chemistry and Engineering University of Science and Technology of China  Hefei China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8372-5987","authenticated-orcid":false,"given":"Dongmei","family":"Cui","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Science and Technology Changchun Institute of Applied Chemistry Chinese Academy of Sciences  Changchun China"},{"name":"School of Applied Chemistry and Engineering University of Science and Technology of China  Hefei China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,13]]},"reference":[{"key":"e_1_2_8_2_1","unstructured":"Plastics Europe (2024) Plastics\u2013the fast Facts 2024Plastics Europe https:\/\/plasticseurope.org\/knowledge\u2010hub\/plastics\u2010the\u2010fast\u2010facts\u20102024\/."},{"key":"e_1_2_8_3_1","unstructured":"OECD (2024) Global Plastics Outlook: Plastics use by region\u2010projectionsOECD Environment Statistics 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