FeP 2 ‐Modified NiCu‐Layered Double Hydroxide In Situ Grown on Cobalt Foam for Highly Efficient Alkaline Oxygen Evolution Reaction
Xiqun Sheng, Zheng Yang, Cheng Zhang, Xing Zhong, Jinyan Liu, Quantao Li, Changfeng Yi, Qing Li, Guangfu Liao, Zushun XuABSTRACT
In this study, we have successfully synthesized FeP 2 nanoparticle‐modified NiCu‐layered double hydroxide (LDH) nanosheets in situ grown on three‐dimensional porous cobalt foam (denoted as FeP 2 /NiCu‐LDH@NCo) toward high‐efficiency and stable oxygen evolution reaction (OER) electrocatalysis in alkaline media. The phosphorization treatment and FeP 2 introduction play a crucial role in effectively regulating the electronic structure of active sites, facilitating the electron transport and optimizing the reaction energy barrier of the catalytic process. Furthermore, the hierarchical flower‐like structure of NiCu‐LDH presents a larger surface area with more exposed active sites, thus resulting in exceptional OER catalytic activity. The as‐prepared FeP 2 /NiCu‐LDH@NCo requires only 237 mV to reach a current density of 10 mA cm −2 in 1.0 M KOH solution, outperforming the FeP 2 /NiCo‐LDH@NCo counterpart and most previously reported non‐noble OER catalysts. The FeP 2 /NiCu‐LDH@NCo catalyst also displays superior stability, maintaining a sustained current density throughout long‐term electrolysis.