Abstract
Direct imaging of individual catalyst metal atoms on the insulating surface of an industrial support is demonstrated. Individual platinum and rhodium atoms ultradispersed on γ-Al 2 O 3 supports were imaged by high-resolution Z -contrast (atomic number Z ) microscopy in a 300-kilovolt scanning transmission electron microscope. Within small clusters, the configuration of the metal atoms was seen to be constrained to match the surface structure of the γ-Al 2 O 3 , from which likely surface adsorption sites were deduced. A thin, extended raft of rhodium atoms was observed, mostly corresponding to one monolayer. Occasional two-atom features suggested partial dissolution into the top layers of the γ-Al 2 O 3 support.
Keywords
CatalysisMaterials scienceChemistryOrganic chemistry
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Publication Info
- Year
- 1996
- Type
- article
- Volume
- 274
- Issue
- 5286
- Pages
- 413-415
- Citations
- 313
- Access
- Closed
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Cite This
Peter D. Nellist,
Stephen J. Pennycook
(1996).
Direct Imaging of the Atomic Configuration of Ultradispersed Catalysts.
Science
, 274
(5286)
, 413-415.
https://doi.org/10.1126/science.274.5286.413
Identifiers
- DOI
- 10.1126/science.274.5286.413