Properties of Heusler alloys as catalysts

Abstract

Intermetallic compounds can be used as novel catalysts because of their unique electronic structures and ordered surface structures. From Heusler alloys (X₂YZ), novel catalysts can be discovered among many possible sets of X, Y, and Z. The component elements can be substituted by others, in many cases, which enables a fine control of catalysis. We have investigated the catalytic properties of Heusler alloys that were unknown as catalysts. A discovery of good catalysts for selective hydrogenation of alkynes and a systematic control of catalysis were achieved using powder catalysts synthesized metallurgically. The durability and roles of X, Y, and Z were also investigated. Recently, nanoparticle catalysts were successfully synthesized.