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首页> 外文期刊>International Journal of Electrochemical Science >Flower-like NiFe Oxide Nanosheets on Ni Foam as Efficient Bifunctional Electrocatalysts for the Overall Water Splitting
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Flower-like NiFe Oxide Nanosheets on Ni Foam as Efficient Bifunctional Electrocatalysts for the Overall Water Splitting

机译：Ni泡沫上的花状NiFe氧化物纳米片作为整体水分解的高效双功能电催化剂

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摘要

Since the oxygen evolution reaction (OER) is a fundamental step in the overall water splitting process,it is necessary for an ideal catalyst to require a small amount of energy to overcome the energy barrierat the electrode-electrolyte interface. Therefore, developing highly active and integrated catalysts is ofgreat significance. Herein, we present a facile and viable method to fabricate flower-like NiFe oxidenanosheets electrocatalysts that are directly grown on nickel foam substrates through a hydrothermalreaction. By tuning the Ni:Fe ratio, the as-synthesized NiFe oxide exhibits excellent catalytic activitythat surpasses the activity of the RuO 2 benchmark catalyst, when tested as an electrocatalyst for theoverall water splitting reaction. More importantly, the optimized NiFe oxide electrode possessesexcellent OER activity in 1 M KOH with small overpotentials of 255 and 280 mV at 10 and 50 mA cm -2 , respectively. When employed as a stable bifunctional catalyst to split water, this electrode achieved acurrent density of 10 mA cm ?2 at a cell voltage of 1.59 V. This work presents a highly promisingcandidate for use as an electrode material and represents promising progress in its practical utilizationand comprehensive industrialization.
机译：由于析氧反应（OER）是整个水分解过程中的基本步骤，因此理想的催化剂需要少量的能量来克服电极-电解质界面的能垒。因此，开发高活性和集成化催化剂具有重要意义。在这里，我们提出了一种简便而可行的方法来制造通过水热反应直接生长在泡沫镍上的花状NiFe氧化纳米片状电催化剂。通过测试Ni：Fe的比例，当作为整体水分解反应的电催化剂进行测试时，合成后的NiFe氧化物具有出色的催化活性，超过了RuO 2基准催化剂的活性。更重要的是，优化的NiFe氧化物电极在1 M KOH中具有出色的OER活性，在10和50 mA cm -2时的过电位分别为255和280 mV。当用作稳定的分解水的双功能催化剂时，该电极在1.59 V的电池电压下达到了10 mA cm？2的电流密度。这项工作为电极材料的应用提供了非常有希望的候选方法，并在其实际应用和应用方面都显示出了可喜的进展。综合工业化。

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