Journal
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
Volume 33, Issue 7, Pages 382-387Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppsc.201500252
Keywords
catalysis; metal-organic frameworks; nanoparticles; TEM; electron tomography; MOFs
Funding
- FWO Vlaanderen
- Hercules foundation of the Flemish government
- Belgian IAP-PAI network
- Ghent University BOF postdoctoral Grant [01P06813T]
- UGent GOA Grant [01G00710]
- BOF-UGent (GOA) [01G01513]
- Hercules Foundation [AUGE/09/014]
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MIL-101 giant-pore metal-organic framework (MOF) materials have been loaded with Pt nanoparticles using atomic layer deposition. The final structure has been investigated by aberration-corrected annular dark-field scanning transmission electron microscopy under strictly controlled low-dose conditions. By combining the acquired experimental data with image simulations, the position of the small clusters within the individual pores of a metal-organic framework has been determined. The embedding of the Pt nanoparticles is confirmed by electron tomography, which shows a distinct ordering of the highly uniform Pt nanoparticles. The results show that atomic layer deposition is particularly well-suited for the deposition of individual nanoparticles inside MOF framework pores and that, upon proper regulation of the incident electron dose, annular dark-field scanning transmission electron microscopy is a powerful tool for the characterization of this type of materials at a local scale.
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