To generate hydrogen, which is a clean energy carrier, a combination of electrolysis and renewable energy sources is desirable. In particular, for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in electrolysis, it is necessary to develop nonprecious, efficient, and durable catalysts. A robust nonprecious copper-iron (CuFe) bimetallic composite is reported that can be used as a highly efficient bifunctional catalyst for overall water splitting in an alkaline medium. The catalyst exhibits outstanding OER and HER activity, and very low OER and HER overpotentials (218 and 158 mV, respectively) are necessary to attain a current density of 10 mA cm-2 . When used in a two-electrode water electrolyzer system for overall water splitting, it not only achieves high durability (even at a very high current density of 100 mA cm-2 ) but also reduces the potential required to split water into oxygen and hydrogen at 10 mA cm-2 to 1.64 V for 100 h of continuous operation.

中文翻译：

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坚固耐用的非贵重CuFe复合材料，可作为用于整体电化学水分解的高效双功能催化剂。

为了产生作为清洁能源载体的氢，电解和可再生能源的组合是合乎需要的。特别地，对于电解中的氧释放反应（OER）和氢释放反应（HER），必须开发非贵重，有效和耐用的催化剂。据报道，一种坚固的非贵重铜铁（CuFe）双金属复合材料可用作碱性介质中全部水分解的高效双功能催化剂。该催化剂具有出色的OER和HER活性，并且非常低的OER和HER过电势（分别为218和158 mV）对于获得10 mA cm-2的电流密度是必需的。当在两电极电解水系统中用于整体水分解时，