In this study, Au was electrodeposited on a support of CaFeMg layered double hydroxide and then, its catalytic activity was investigated for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Field emission scanning electron microscopy images showed that a uniform porous film of aggregated nano-particles of the LDH has been decorated with Au nanodendrite-like structures (AuNDs@LDH). The results obtained from polarization curves, Tafel plots and electrochemical impedance spectroscopy showed that the AuNDs@LDH exhibits lower overpotential, higher current density, faster kinetics and enhanced stability for both of the OER and HER, in comparison with the single AuNPs and LDH catalysts.

在这项研究中，Au被电沉积在CaFeMg层状双氢氧化物的载体上，然后研究了其对氧释放反应（OER）和氢释放反应（HER）的催化活性。场发射扫描电子显微镜图像显示，LDH的聚集纳米颗粒的均匀多孔膜已被金纳米树突状结构（AuNDs @ LDH）装饰。从极化曲线，Tafel图和电化学阻抗谱获得的结果表明，与单一的AuNPs和LDH催化剂相比，AuNDs @ LDH的OER和HER表现出更低的过电势，更高的电流密度，更快的动力学和更高的稳定性。