Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.11889/7632
Title: | Phase transition and lattice expansion during hydrogen loading of nanometer sized palladium clusters | Authors: | Suleiman, M. Jisrawi, N.M. Dankert, O. Reetz, M.T. Bähtz, C. Kirchheim, R. Pundt, A. |
Keywords: | Clusters;Metal crystals;Metals;Hydrogen - Storage - Materials;Crystallography;Crystal structure and symmetry;Synchrotron radiation | Issue Date: | 2003 | Publisher: | Journal of Alloys and Compounds | Abstract: | In situ X-ray diffraction (XRD) measurements for Pd-clusters (3.8 and 6.0 nm) are performed during hydrogen loading and unloading. The lattice parameter increases as a function of the hydrogen partial pressure. The expansion is smaller than that of bulk palladium and is shown to be cluster-size dependent. An (a–a9) phase transition was observed for the large clusters but small clusters do not show this transition. XRD analysis of the as-prepared clusters show that the 3.8-nm sized clusters predominantly have an icosahedral structure, while the 6.0-nm sized clusters have a cubic structure. The effect of size and structure of the cluster on the lattice expansion and on the phase transition will be discussed. | URI: | http://hdl.handle.net/20.500.11889/7632 | DOI: | 10.1016/S0925-8388(02)01286-0 |
Appears in Collections: | Fulltext Publications |
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Phase transition and lattice expansion during hydrogen loading of nanometer sized palladium clusters.pdf | 154.84 kB | Adobe PDF | View/Open |
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