Direct assessment of confinement effect in zeolite-encapsulated subnanometric metal species.

ABSTRACT: Subnanometric metal species confined inside the microporous channels/cavities of zeolites have been demonstrated as stable and efficient catalysts. The confinement interaction between the metal species and zeolite framework has been proposed to play the key role for stabilization, though the confinement interaction is elusive to be identified and measured. By combining theoretical calculations, imaging simulation and experimental measurements based on the scanning transmission electron microscopy-integrated differential phase contrast imaging technique, we have studied the location and coordination environment of isolated iridium atoms and clusters confined in zeolite. The image analysis results indicate that the local strain is intimately related to the strength of metal-zeolite interacti

SUBMITTER: Liu L 

PROVIDER: S-EPMC8831493 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature