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For the first time, the coordination of Co<jats:sup>2+<\/jats:sup> ions with (C<jats:sub>2<\/jats:sub>O<jats:sub>4<\/jats:sub>)<jats:sup>2\u2212<\/jats:sup> ions in borate systems was observed. Notably, upon pyrolyzing precursor compound <jats:bold>1<\/jats:bold>, high\u2010resolution transmission electron microscopy (HRTEM) revealed a catalyst with a carbon\u2010supported Co nanocrystal structure, which significantly enhanced the oxygen reduction reaction (ORR) performance, achieving a half\u2010wave potential comparable to that of Pt\/C. More importantly, the catalyst outperformed Pt\/C when applied in a zinc\u2010air battery.<\/jats:p>","DOI":"10.1002\/chem.202500584","type":"journal-article","created":{"date-parts":[[2025,5,3]],"date-time":"2025-05-03T10:45:34Z","timestamp":1746269134000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["In Situ Synthesized Cobalt Nanocrystal via Bipyridine Ligand Cobaltic Borate Annealing Method for High\u2010performance Zinc\u2010air Battery"],"prefix":"10.1002","volume":"31","author":[{"given":"Lei","family":"Liu","sequence":"first","affiliation":[{"name":"School of Light Industry and Chemical Engineering Guangdong University of Technology  Guangzhou Guangdong 510006 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiang\u2010Yu","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Light Industry and Chemical Engineering Guangdong University of Technology  Guangzhou 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