The O–O bond-formation mechanism in water oxidation is still ambiguous even now. In this issue of Chem, Wang and co-workers prove that this mechanism on a Co-based electrocatalyst can switch from a radical coupling pathway to a water nucleophilic attack pathway when the applied potential is lifted.

中文翻译：

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通过控制水分活度来切换 O-O 键形成机制

即使是现在，水氧化中 O-O 键的形成机制仍然不明确。在本期Chem 中，Wang 和同事证明，当外加电位升高时，Co 基电催化剂上的这种机制可以从自由基耦合途径转变为水亲核攻击途径。