In Situ/Operando Probing of Dynamic Phase Structures of Alumina-Supported Ultrasmall Copper-Gold Alloy Nanoparticles Under Reaction Conditions.

ABSTRACT: The ability to control phase structures and surface sites of ultrasmall alloy nanoparticles under reaction conditions is essential for preparing catalysts by design. This is, however, challenging due to limited understanding of the atomic-scale phases and their correlation with the ensemble-averaged structures and activities of catalysts during catalytic reactions. We reveal here a dynamic structural stability of alumina-supported ultrasmall and equiatomic copper-gold alloy nanoparticles under reaction conditions as a model system in the in situ/operando study. In situ atomic-scale morphological tracking under oxygen reveals temperature-dependent dynamic crystalline-amorphous dual-phase structures, showing dynamic stability over an elevated temperature range. This atomic-scale dynamic phas

SUBMITTER: Cheng HW 

PROVIDER: S-EPMC12322633 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature