High-entropy FeCoNiCrCe layered double hydroxides by facile pulse current electrodeposition as high performance electrocatalysts for the oxygen evolution reaction

. The enhancements arise not only from the synergistic effect of five-metal composition, but more importantly, from the microstructural advantages of the PC-prepared electrode, which are revealed from a novel perspective by comparison with its DC-prepared counterpart electrode. which are revealed from a novel perspective by comparison with its DC-prepared electrode, which served as the counterpart. The optimized surface morphology with uniform element distribution and similar content by PC electrodeposition enables more effective electronic structure modulation of the active sites by Cr and Ce in the local micro-region. Moreover, the near-equal element composition in FeCoNiCrCe is conducive to increasing the configuration entropy, making the high-entropy stabilization effect more pronounced, thereby leading to enhanced structural stability and OER durability compared to the DC counterpart.