Bridging the structure-properties relationship of bimetallic catalysts is an essential goal in heterogeneous catalysis. Random alloys <u>are commonly used</u> catalysts, but they lack an atomic control of the structures leading to local heterogeneity. The presence of local heterogeneity in alloys stymies their structural clarification for mechanism studies and hampers their selectivity in catalytic reactions. Intermetallic compounds are special alloys that have ordered crystal structures. The formation of the ordered structure is driven by thermodynamics, which means intermetallic compounds are structurally more stable than random alloys. Intermetallic compounds (IMCs) have been used as heterogeneous catalysts and often lead to significantly enhanced selectivity and stability. There are more than 10,000 reported intermetallic compounds of different compositions and structures, while only a tiny portion of them have been studied for application in heterogeneous catalysis. Catalysts based on IMCs has shown superior selectivity in hydrogenation, dehydrogenation, oxidation, steam reforming, and hydroformylation reactions. In this presentation, the discussion will be focused on the origin of high selectivities of IMCs in hydrogenation reactions based on our understanding of the ordered surface structures of IMCs and the molecule-surface interactions.<br/>

Intermetallic nanoparticles with atomic precision for selective catalytic transformations

2019 Spring National Meeting

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