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OER typically proceeds through three primary mechanisms: adsorbate evolution mechanism (AEM), lattice oxygen oxidation mechanism (LOM), and oxide path mechanism (OPM). Unlike AEM and LOM, the OPM proceeds via direct oxygen\u2013oxygen radical coupling that can bypass linear scaling relationships of reaction intermediates in AEM and avoid catalyst structural collapse in LOM, thereby enabling enhanced catalytic activity and stability. Despite its unique advantage, electrocatalysts that can drive OER via OPM remain nascent and are increasingly recognized as critical. This review discusses recent advances in OPM\u2010based OER electrocatalysts. It starts by analyzing three reaction mechanisms that guide the design of electrocatalysts. Then, several types of novel materials, including atomic ensembles, metal oxides, perovskite oxides, and molecular complexes, are highlighted. Afterward,\n                    <jats:italic>operando<\/jats:italic>\n                    characterization techniques used to monitor the dynamic evolution of active sites and reaction intermediates are examined. The review concludes by discussing several research directions to advance OPM\u2010based OER electrocatalysts toward practical applications.\n                  <\/jats:p>","DOI":"10.1002\/adma.202416362","type":"journal-article","created":{"date-parts":[[2025,1,15]],"date-time":"2025-01-15T23:22:01Z","timestamp":1736983321000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":346,"title":["Advances in Oxygen Evolution Reaction Electrocatalysts via Direct Oxygen\u2013Oxygen Radical Coupling Pathway"],"prefix":"10.1002","volume":"37","author":[{"given":"Chengli","family":"Rong","sequence":"first","affiliation":[{"name":"School of Chemical and Biomolecular Engineering The University of Sydney  Darlington New South Wales 2006 Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinyi","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Chemical and Biomolecular Engineering The University 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