New Aspects of Platinum Group Metal-Based Solid-Solution Alloy Nanoparticles: Binary to High-Entropy Alloys.

Abstract

Platinum group metal (PGM) nanoparticles (NPs) have been investigated in a variety of research fields such as catalysis and electronics. Alloying has been recognized as one of the most efficient ways of improving or creating properties in metals. Among the types of alloys, solid-solution alloy NPs have the advantage of being capable of continuously changing their properties by tuning their composition. However, synthesizing PGM solid-solution alloy NPs with any combination and composition is not an easy task due to the metallurgical aspects. In this review, we focus on recent advances in PGM-based solid-solution alloy NP, and in particular those with immiscible alloy systems. We introduce the concepts, synthesis, and properties of the alloy NPs, and discuss the existing challenges and future perspectives.