在CoP上原位电沉积FeCo LDH实现高效率析氧

Achieving High Efficiency Oxygen Evolution by in-situ Electrodeposition of FeCo LDH on CoP

摘要: 电解水分解具有高效、环保、可持续等优点，正在成为一种领先的制氢方法。电解水过程中的析氧反应(OER)动力学缓慢，阻碍了电解水的效率，亟需设计高效的催化剂以提高OER效率。将FeCo LDH电沉积在泡沫镍(NF)表面的CoP上，制备了FeCo LDH/CoP复合电催化剂。实验结果表明，该纳米复合材料具有更大的反应表面积、更高的导电性和更强的电催化活性，表现出优异的催化性能。FeCo LDH/CoP在50 mA cm⁻²时过电位为214 mV，并且在50 mA cm⁻²下连续工作77小时，电压没有显着增加。该研究通过加入一种新的相来调节电荷分布，从而提高了整体的OER性能，为相关研究和应用开辟了新的途径。

Abstract: Electrolytic water splitting has the advantages of high efficiency, environmentally friendly, sustainable, etc., and is becoming a leading approach to producing hydrogen. The slow kinetics of oxygen evolution reaction (OER) in the process of water electrolysis hinder the efficiency of water electrolysis, and it is urgent to design efficient catalysts to improve the efficiency of OER. The composite named FeCo LDH/CoP electrocatalyst was prepared by electrodepositing FeCo LDH onto CoP on nickel foam. The experimental results show that the nanocomposite displays an outstanding catalytic performance, benefiting from its more reactive surface area, improved conductivity and enhanced electrocatalytic activity. FeCo LDH/CoP shows 214 mV overpotential at 50 mA cm⁻² and it demonstrates no significant increase in voltage for continuously operating 77 h at 50 mA cm⁻². This study improves the OER performance by adding a new phase to regulate the charge distribution, which opens up a new way for related research and application.