Abstract Design of electrodes that can simultaneously be excellent electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is important to produce hydrogen energy. In this study, Ni–Fe nanosheets were first created by electrochemical deposition method and then Mo-doped Ni–Fe nanosheets were created by hydrothermal electrode method. Then, electrode performance was investigated as electrocatalyst of HER and OER reactions. Morphology and microstructure of the electrodes were investigated using Field emission scanning electron microscopy (FESEM) and electrocatalytic activity was evaluated using LSV, Tafel test and EIS methods. The results of this study showed that among Ni–Fe electrodes sample, M-20 had the best electrocatalytic properties as well as molybdenum-doped electrode due to high surface area and also the synergistic effect of molybdenum doping showed better electrocatalytic behavior. In which, to generate a current density of 10 mA.cm−2 for the HER and OER, it required the 84 and 225 mV overpotentials, respectively. The electrode was also used as a bifunctional electrode for overall water splitting, which required a voltage of 1.81 V to generate a current density of 100 mA.cm−2. This study introduces an economical and effective method for the synthesis of electrocatalysts with appropriate activity.

中文翻译：

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电沉积超亲水和无粘合剂的 Mo 掺杂 Ni Fe 纳米片作为用于整体水分解的经济高效的双功能电催化剂

摘要 设计能够同时作为析氢反应 (HER) 和析氧反应 (OER) 的优良电催化剂的电极对于产生氢能很重要。在这项研究中，Ni-Fe 纳米片首先通过电化学沉积法制备，然后 Mo 掺杂的 Ni-Fe 纳米片通过水热电极法制备。然后，研究了电极作为 HER 和 OER 反应的电催化剂的性能。使用场发射扫描电子显微镜 (FESEM) 研究电极的形态和微观结构，并使用 LSV、Tafel 测试和 EIS 方法评估电催化活性。本研究结果表明，在 Ni-Fe 电极样品中，M-20 具有最好的电催化性能以及由于高表面积和钼掺杂的协同效应而表现出更好的电催化行为的钼掺杂电极。其中，要为 HER 和 OER 产生 10 mA.cm-2 的电流密度，分别需要 84 和 225 mV 的过电位。该电极还用作整体水分解的双功能电极，需要 1.81 V 的电压才能产生 100 mA.cm-2 的电流密度。本研究介绍了一种经济有效的合成具有适当活性的电催化剂的方法。该电极还用作整体水分解的双功能电极，需要 1.81 V 的电压才能产生 100 mA.cm-2 的电流密度。本研究介绍了一种经济有效的合成具有适当活性的电催化剂的方法。该电极还用作整体水分解的双功能电极，需要 1.81 V 的电压才能产生 100 mA.cm-2 的电流密度。本研究介绍了一种经济有效的合成具有适当活性的电催化剂的方法。