Nanomaterials - 10

Abstract

High-entropy alloys (HEAs) offer a powerful platform for designing efficient and durable electrocatalysts through multi-element synergy and electronic tunability. In this work, we develop ‘mesoporous nanospheres integrating high-entropy alloy sites‘ via a controlled wet-chemical synthesis. The nanospheres exhibit ‘uniform mesoporosity, large active surface area, and homogeneous elemental distribution‘, ensuring rapid mass and charge transport. Electrocatalytic evaluation in alkaline medium reveals ‘outstanding hydrogen evolution (HER) and hydrogen oxidation (HOR) activities‘, with superior kinetics and durability compared to commercial Pt catalysts. The exceptional performance arises from the ‘entropy-stabilized solid-solution structure‘, which optimizes the hydrogen adsorption energy and accelerates interfacial electron transfer. This study establishes a ‘structure-composition coupling strategy‘ that unites mesostructural design with high-entropy chemistry, advancing the development of robust catalysts for hydrogen energy conversion technologies.