Research Progress in the Design, Preparation, and Applications of Platinum-Group Metal High-Entropy Alloys

Abstract:

High-entropy alloys (HEAs) are a class of multi-principal-element materials comprising five or more major elements in equimolar or near-equimolar ratios. These alloys exhibit distinctive properties, including high-entropy effects, severe lattice distortion, sluggish diffusion, and cocktail effects. Platinum-group metal high-entropy alloys (PGM-HEAs), renowned for their exceptional catalytic activity, corrosion resistance, and multifunctional characteristics, have demonstrated significant potential for applications in industrial and high-tech sectors such as catalysis and energy conversion. Consequently, PGM-HEAs have emerged as a pivotal subfield of HEA research. This article comprehensively reviews the design strategies, synthesis methodologies, and recent advancements in PGM-HEA applications, while also outlining future research directions and challenges.