{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T18:21:50Z","timestamp":1787768510319,"version":"build-2784847793"},"reference-count":49,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"35","funder":[{"DOI":"10.13039\/501100001409","name":"Department of Science and Technology, Ministry of Science and Technology","doi-asserted-by":"publisher","award":["DST\/CEST\/INDO-FRENCH\/2025\/20"],"award-info":[{"award-number":["DST\/CEST\/INDO-FRENCH\/2025\/20"]}],"id":[{"id":"10.13039\/501100001409","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Board of Research in Nuclear Science","award":["58\/14\/19\/2023-BRNS"],"award-info":[{"award-number":["58\/14\/19\/2023-BRNS"]}]}],"content-domain":{"domain":["www.science.org"],"crossmark-restriction":true},"short-container-title":["Sci. Adv."],"published-print":{"date-parts":[[2026,8,28]]},"abstract":"<jats:p>\n                    Designing efficient, metal-free covalent organic framework (COF) electrocatalysts is a promising strategy for the oxygen reduction reaction (ORR) due to their structural tunability and stability. Herein, we report two redox-active donor\u2013acceptor COFs, TAPA-DHTD and TTT-DHTD, incorporating a thiophene-based dithiophenedione (DHTD) unit. Among them, TTT-DHTD exhibits superior ORR performance with a half-wave potential (E\n                    <jats:sub>1\/2<\/jats:sub>\n                    ) of 0.82 V vs RHE, approaching that of 20% Pt\/C (0.85 V) and surpassing most reported metal-free COFs. It also demonstrates excellent methanol tolerance and long-term durability, maintaining activity over 120 hours. Density functional theory (DFT) calculations reveal that the donor\u2013acceptor framework optimizes the\n                    <jats:italic toggle=\"yes\">p<\/jats:italic>\n                    -band center, enhances charge separation, and improves adsorption of oxygenated intermediates, thereby accelerating ORR kinetics. This work provides a rational strategy for designing durable, high-performance metal-free electrocatalysts for sustainable energy applications.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aee3092","type":"journal-article","created":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T17:59:39Z","timestamp":1787767179000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":0,"title":["Metal-free redox active covalent organic frameworks for electrocatalytic oxygen reduction reaction"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-5490-6537","authenticated-orcid":true,"given":"Bikash","family":"Mishra","sequence":"first","affiliation":[{"name":"Department of Chemical and Biological Sciences, S. N. 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Bose National Centre for Basic Sciences, Kolkata - 700106, India."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-0505-4808","authenticated-orcid":true,"given":"Chowdhury Ismat","family":"Nurani","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata - 700106, India."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-4610-3168","authenticated-orcid":true,"given":"Monojit","family":"Roy","sequence":"additional","affiliation":[{"name":"Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali SAS Nagar - 140306, Mohali, India."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8399-2962","authenticated-orcid":true,"given":"Debashis","family":"Adhikari","sequence":"additional","affiliation":[{"name":"Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali SAS Nagar - 140306, Mohali, India."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9285-0525","authenticated-orcid":true,"given":"Ranjit","family":"Thapa","sequence":"additional","affiliation":[{"name":"Department of Physics, SRM University\u2013AP, Amaravati 522 240, Andhra Pradesh, India."},{"name":"Centre for Computational and Integrative Sciences, SRM University\u2013AP Amaravati 522 240, Andhra Pradesh, India."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3297-1437","authenticated-orcid":true,"given":"Ramendra Sundar","family":"Dey","sequence":"additional","affiliation":[{"name":"Institute of Nano Science and Technology (INST), Sector-81, Mohali, Punjab 140306, India."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0804-541X","authenticated-orcid":true,"given":"Pradip","family":"Pachfule","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biological Sciences, S. 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