True nature: The activity of archetypal iridium water oxidation catalysts is evaluated under exactly the same experimental conditions, exploiting NaIO₄ as electron acceptor. [Ir(OH)₆]²⁻ is found to be the most active catalysts reaching a record value for NaIO₄-driven water oxidation. Comparative kinetic analysis suggests that the active species has to be molecular in nature.

中文翻译：

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以铱配合物为基准的水氧化催化剂的基准：对活性物种性质的线索和怀疑

真实的性质：原型原型铱水氧化催化剂的活性在完全相同的实验条件下进行评估，利用NaIO ₄作为电子受体。发现[Ir（OH）₆ ] ^2-是最具活性的催化剂，达到了NaIO ₄驱动的水氧化的记录值。比较动力学分析表明，活性物质必须是分子性质的。