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Current methods such as natural decomposition, composting, and incineration are limited by significant carbon dioxide emissions and resource waste. Here, an efficient electrocatalytic conversion approach is presented to transform PLA waste into high\u2010value chemicals, particularly potassium acetate (AA\u2010K). By combining experimental and theoretical calculation, a high\u2010performance catalyst Ni(Co)OOH is developed, which exhibits a current density of 403\u00a0mA cm\u207b\n                    <jats:sup>2<\/jats:sup>\n                    at 1.40\u00a0V (vs RHE) with 96% Faraday efficiency for AA\u2010K in the electrooxidation of potassium lactate (LA\u2010K, the product of PLA degradation in KOH). Through in situ spectroscopy techniques and density functional theory calculations, the structural regulation of the catalyst, and reaction pathways of the electrooxidation are elucidated. Further experiments demonstrate the superior catalytic performance of the Ni(Co)OOH catalyst in an industrial\u2010scale tandem system. In 2 h of electrolysis, 320\u00a0g of PLA waste produces 232 L of H\u2082, yielding 1200\u00a0g of AA\u2010K with 97% purity after neutralization and drying. The system demonstrates high conversion efficiency (approaching 97%) for diverse real PLA waste forms, including powder, cups, fibers, and cloth. This research provides a scalable and sustainable approach for PLA waste upcycling.\n                  <\/jats:p>","DOI":"10.1002\/adma.202419578","type":"journal-article","created":{"date-parts":[[2025,2,13]],"date-time":"2025-02-13T04:41:28Z","timestamp":1739421688000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["High\u2010Performance Electrocatalysts of Potassium Lactate Oxidation for Hydrogen and Solid Potassium Acetate Production"],"prefix":"10.1002","volume":"37","author":[{"given":"Jun","family":"Hu","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering Anhui University  Hefei 230601 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xintong","family":"Gao","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering The University of Adelaide  Adelaide SA 5005 Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shanqing","family":"Li","sequence":"additional","affiliation":[{"name":"Anhui Engineering Research Center of Highly Reactive Micro\u2010Nano Powders Chizhou University  Chizhou 247000 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhongsheng","family":"Xie","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering Anhui University  Hefei 230601 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinyu","family":"Sheng","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering Anhui University  Hefei 230601 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhixiang","family":"Yuan","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering Anhui University  Hefei 230601 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fei","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering Anhui University  Hefei 230601 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ping","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering Anhui University  Hefei 230601 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yao","family":"Zheng","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering The University of Adelaide  Adelaide SA 5005 Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4568-8422","authenticated-orcid":false,"given":"Shi\u2010Zhang","family":"Qiao","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering The University of Adelaide  Adelaide SA 5005 Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,2,13]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.biotechadv.2011.06.019"},{"key":"e_1_2_8_1_2","doi-asserted-by":"publisher","DOI":"10.3390\/polym13111854"},{"key":"e_1_2_8_1_3","doi-asserted-by":"publisher","DOI":"10.1039\/D3GC04234K"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41893-023-01082-z"},{"key":"e_1_2_8_2_2","doi-asserted-by":"publisher","DOI":"10.1039\/D2CS00689H"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.macromol.1c02085"},{"key":"e_1_2_8_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.1c08159"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.3c00848"},{"key":"e_1_2_8_4_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41893-023-01215-4"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41560-021-00899-2"},{"key":"e_1_2_8_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202403792"},{"key":"e_1_2_8_5_3","doi-asserted-by":"publisher","DOI":"10.1016\/j.joule.2023.09.008"},{"key":"e_1_2_8_5_4","doi-asserted-by":"publisher","DOI":"10.1093\/nsr\/nwad099"},{"key":"e_1_2_8_6_1","volume":"16","author":"Chen Y. 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