Der hochdisperse Metallzustand

Fritsche, H.‐G.; Kadura, P.; Künne, L.; Müller, Hans; Bauwe, Eckhard; Engels, S.; Mörke, Wolfgang; Rasch, Gerhard; Birke, Peter; Spindler, H.; Wilde, M.; Lieske, H.; Völter, Jochen

doi:10.1002/zfch.19840240503

Zeitschrift fuer Chemie

1984

DOI: 10.1002/zfch.19840240503

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Der hochdisperse Metallzustand

H.‐G. Fritsche

P. Kadura

L. Künne

et al.

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1985

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Cited by 10 publications

References 90 publications

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Analytical calculation of binding energies of highly symmetrical particles

Fritsche

1989

Cryst. Res. Technol.

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Analytical formulae of binding energies per atom are derived for icosahedral, cuboctahedral and face-centered cubic particles AN by means of summation of pair potentials. Asymptotical relations for larger particles E/N = V ( A -B N -1 / 3 ) as well as the topological model of clusters are discussed.Fur die Summe von Paar-Potentialen werden einfache analytische Formeln zur Berechnung der mittleren atomaren Bindungsenergien ikosaedrischer, kuboktaedrischer und kubisch flachenzentrierter Tcilchen AN aufgestellt. Fur groJ3ere Teilchen ergibt sich daraus die asymptotische Beziehung E/N = V ( A -B N -1 / 3 ) . Der EinfluJ3 einer topologischen Nfiherung auf die Bindungsenergie wird diskutiert.

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Analytical calculation of binding energies of highly symmetrical particles

Fritsche

1989

Cryst. Res. Technol.

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Struktur-Aktivit�tsbeziehungen von Hydrierkatalysatoren

et al. 1992

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Structure / Activity Correlations of Hydrogenation Catalysts The reason for different activities of group VIII metal catalysts in several hydrogenation reactions is unknown. The activity of group VIII metal catalysts decreases in the hydrogenation of crotonaldehyde to butyraldehyde in the following sequence Pd > Pt > Ni > Rh > Co; Ir. However in the hydrogenation of butyraldehyde to butanol the sequence of metals is inversely. The hydrogenations of crotonaldehyde and butyraldehyde proceed as ligand addition reactions. The reaction rate depends on the nucleophilicity of atomically chemisorbed hydrogen. Whereas the reaction rate in the hydrogenation of crotonaldehyde increases, the hydrogenation rate of butyraldehyde decreases with the nucleophilicity of atomically chemisorbed hydrogen.

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LCAO‐Xα Calculations of Transition Metal Clusters

Seifert

Eschrig

1985

Physica Status Solidi (b)

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The electronic structure of some transition metal clusters (V,, Cr,, Cu,, Ag,) is studied by an approximate LCAO-Xa scheme. Energy level spectra are discussed with respect to other theoretical investigations. The density-of-states curves are represented and compared with those from band-structure calculations. The correlation between binding energies of clusters and the corresponding cohesive energies of the bulk material is shown. Furthermore, the binding energies in copper clusters versus cluster size are discussed. Finally, some experimental results according beams of copper clusters and ESR studies of matrix isolated copper clusters are explained briefly.Die Elektronenstruktur von ~bergangsmetallatomclustern (V,, Cr,, Cu,, Age) wird mit Hilfe eines approximativen LCAO-Xor-Verfahrens untersucht. Die Energieniveauschemata werden hinsichtlich anderer theoretischer Untersuchungen diskutiert. Die Zustandsdichtekurven werden dargestellt und mit denen von Bandstrukturberechnungen verglichen. Die Korrelation der Bindungsenergien der Cluster und der entsprechenden Kohisionsenergien der Festkorper wird gezeigt. Weiterhin werden die Bindungsenergien in Kupferclustern in Abhiingigkeit von der ClustergriiBe diskutiert. SchlieBlich werden knapp einige experimentelle Ergebnisse bezuglich von Strahlen von Kupferclustern und ESR-Studien an matrixisolierten Kupferclustern erkliirt.

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Der hochdisperse Metallzustand

Cited by 10 publications

References 90 publications

Analytical calculation of binding energies of highly symmetrical particles

Analytical calculation of binding energies of highly symmetrical particles

Struktur-Aktivit�tsbeziehungen von Hydrierkatalysatoren

LCAO‐Xα Calculations of Transition Metal Clusters

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