Stabilization of unprecedented crystal phases of metal nanomaterials

Abstract

Metal nanomaterials (NMs) have attracted much attention from both scientific and practical perspectives. Because the crystal structure of metal NMs is a crucial factor in determining corresponding physicochemical properties, investigations of unprecedented crystal structures facilitate development of new functions and enhancement of well-known properties. Although an infinite number of crystal structures are geometrically possible, formation of experimentally known crystal structures depends on thermodynamics. Here, we introduce synthetic strategies for new frameworks of mono-metal and alloy NMs as well as unprecedented ordered structures of alloy NMs, reveal the contribution to enhanced catalysis of the hydrogen evolution and oxygen reduction reactions, and provide perspectives on catalytic properties that depend on unique crystal structures.