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This issue is particularly pressing for polyoxymethylene (POM), a widely used engineering thermoplastic known for its exceptional mechanical properties and durability, which degrades slowly and releases harmful formaldehyde (HCHO). Herein a straightforward method is presented to convert POM waste into formic acid (FA) using hydrogen peroxide (H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>) as the oxidant. While H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> is recognized as a selective and mild oxidation agent, its potential for upcycling plastics into valuable chemicals has been largely uncharted. The approach utilizes microporous aluminosilicate zeolite H\u2010Beta, known for its Br\u00f8nsted acidity, to effectively catalyze both the depolymerization of POM into HCHO and its subsequent oxidation to FA. A significant aspect of this method is the incorporation of 1,1,1,3,3,3\u2010hexafluoroisopropanol, which enhances depolymerization through strong hydrogen bonding interactions. This catalytic system efficiently transforms a variety of postconsumer POM waste into FA while also facilitating the Baeyer\u2013Villiger\u2010type oxidation of various carbonyl compounds, achieving high yields in both processes. Overall, these findings advance the conversion of plastic waste into value\u2010added chemicals via H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>\u2010mediated reactions, enhancing sustainable waste management and supporting circular economy principles.<\/jats:p>","DOI":"10.1002\/cssc.202500179","type":"journal-article","created":{"date-parts":[[2025,3,31]],"date-time":"2025-03-31T05:51:25Z","timestamp":1743400285000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Upcycling Polyoxymethylene via H<sub>2<\/sub>O<sub>2<\/sub>\u2010Mediated Selective Oxidation"],"prefix":"10.1002","volume":"18","author":[{"given":"Mugeng","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials State Key Laboratory of Porous Materials for Separation and Conversion Fudan University  Shanghai 200438 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