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Three-Dimensional Structural Analysis of MgO-Supported Osmium Clusters by Electron Microscopy with Single-Atom Sensitivity


  • This work was supported by the Department of Energy (DOE), grants DE-SC0005822 and DE-FG02-03ER46057 (C.A.) and the University of California Lab Fee Program. The electron microscopy experiments were performed at the Oak Ridge National Laboratory Shared Research Equipment (ShaRE) User Facility, which is supported by the Division of Scientific User Facilities, DOE Office of Science, Basic Energy Sciences. We acknowledge beam time and support of the DOE Office of Science, Materials Sciences, for its role in the operation and development of beamlines 4-1 and 10-2 at the Stanford Synchrotron Radiation Lightsource.


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Size, shape, nuclearity: Aberration-corrected scanning transmission electron microscopy was used to determine the 3D structures of MgO-supported Os3, Os4, Os5, and Os10 clusters, which have structures nearly matching those of osmium carbonyl compounds with known crystal structures. The samples are among the best-defined supported catalysts.