Oxyhydroxides have been widely recognized as the true active species for oxygen evolution reaction (OER), while most of them are created via the complicated and time-consuming electrochemical activation process. Here, we develop a facile template-mediated method for directly synthesizing highly active oxyhydroxides toward OER. The optimal FeCoOOH prepared via using CuO as a sacrificial template could exhibit outstanding electrocatalytic OER performance, delivering a current density of 10 mA cm with the overpotential of merely 320 mV, and a corresponding Tafel slope of 77.5 mV dec. Detailed mechanism study outlines that the extraordinary OER performance of such FeCoOOH originated from the intrinsically high OER activity of oxyhydroxide and the high specific surface area of the particular architecture. This work demonstrates a simple and direct route for the successful fabrication of highly active oxyhydroxides, which may open a new way for the synthesis of other active species.

中文翻译：

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用于高效析氧反应的过渡金属羟基氧化物的模板辅助合成策略

羟基氧化物已被广泛认为是析氧反应（OER）的真正活性物质，而它们大多数是通过复杂且耗时的电化学活化过程产生的。在这里，我们开发了一种简便的模板介导方法，用于直接合成高活性的羟基氧化物以用于 OER。使用CuO作为牺牲模板制备的最佳FeCoOOH具有出色的电催化OER性能，电流密度为10 mA cm，过电势仅为320 mV，相应的塔菲尔斜率为77.5 mV dec。详细的机理研究表明，这种 FeCoOOH 非凡的 OER 性能源于羟基氧化物固有的高 OER 活性和特定结构的高比表面积。这项工作展示了一种成功制造高活性羟基氧化物的简单直接的路线，这可能为其他活性物质的合成开辟新途径。