High entropy rare-earth Prussian blue analogues for boosting oxygen evolution catalysis

. The enhanced OER activity and stability of the NiFeLaMoCo-PBA catalyst compared to NiCo-PBA systems primarily stems from the strategic incorporation of Fe, La, and Mo elements into the high-entropy Prussian blue analog architecture. This multielement integration not only optimizes electron transport kinetics but also establishes a robust multimetallic synergistic framework. The resultant electronic structural modulation facilitates charge transfer processes while the coordinated interactions among the five metallic components synergistically lower the activation energy barrier, thereby enhancing the OER performance of the catalyst in alkaline media. The current study demonstrates that NiFeLaMoCo-PBA is a promising candidate for an efficient and cost-effective OER electrocatalyst.