Construction of High-Entropy LDH Nanostructures to Promote Alkaline Oxygen Evolution

The development of highly active transition metal-based catalysts is a key challenge for improving the efficiency of the Oxygen Evolution Reaction (OER). In this study, a high-entropy layered double hydroxide (HE-LDH) composed of five metals was successfully designed and synthesized using a hydrothermal method. Electrochemical performance tests comparing different metal combinations in high-entropy LDHs revealed that NiCoCuFeAl LDH exhibited an overpotential of only 389 mV at a current density of 10 mA cm⁻². Moreover, it demonstrated a smaller Tafel slope of 124.4 mV dec⁻¹. This superior catalytic performance is attributed to the synergistic interactions among the five metals, which optimize the electronic environment. This study offers a promising strategy for designing efficient electrocatalysts with enhanced OER performance.