Characterization of large supported metal clusters by optical spectroscopy

1995 ◽  
Vol 33 (2) ◽  
pp. 133-141 ◽  
Author(s):  
T. G�tz ◽  
W. Hoheisel ◽  
M. Vollmer ◽  
F. Tr�ger
Keyword(s):  
Optical Spectroscopy ◽  
Metal Clusters ◽  
Supported Metal Clusters ◽  
Supported Metal

Characterization of optical spectra of interacting systems: Application to oxide-supported metal clusters

2008 ◽  
Vol 108 (15) ◽  
pp. 2978-2990 ◽  
Author(s):  
Miquel Huix-Rotllant ◽  
Ajanta Deka ◽  
Alexei V. Matveev ◽  
Sergey I. Bosko ◽  
Lyudmila V. Moskaleva ◽  
...  
Keyword(s):  
Metal Clusters ◽  
Optical Spectra ◽  
Supported Metal Clusters ◽  
Interacting Systems ◽  
Supported Metal

Synthesis and Characterization of Supported Metal Cluster Catalysts with Well-Defined Structures

1994 ◽  
Vol 368 ◽  
Author(s):  
B. C. Gates
Keyword(s):  
Metal Clusters ◽  
Metal Cluster ◽  
X Ray ◽  
Coordination Numbers ◽  
Supported Clusters ◽  
Supported Metal Clusters ◽  
X Ray Absorption ◽  
Thermal Decarbonylation ◽  
Supported Metal

ABSTRACTNearly uniform supported metal clusters are the focus of this summary, which addresses their synthesis, characterization, and catalytic properties. Supported clusters represented as Ir4 and Ir6 were prepared on MgO powder by thermal decarbonylation of [HIr4(CO)11]− and [Ir6(CO)15]2−, respectively. The most useful characterization technique for supported clusters is extended X-ray absorption fine structure spectroscopy, but the structure data are limited by the precision of the coordination numbers (about ±20%). Ir4 and Ir6 clusters on supports catalyze hydrogenation of cyclohexene and of toluene, and they are catalytically distinct from larger iridium particles, although the reactions are structure insensitive (proceeding at about the same rate per exposed metal atom) when catalyzed by metal particles larger than about 1 nm. Thus the concept of structure insensitivity does not extend to supported metal clusters, which are regarded as quasi molecular.

Size-dependent catalytic activity of supported metal clusters

Nature ◽  
1994 ◽  
Vol 372 (6504) ◽  
pp. 346-348 ◽  
Author(s):  
Z. Xu ◽  
F.-S. Xiao ◽  
S. K. Purnell ◽  
O. Alexeev ◽  
S. Kawi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Clusters ◽  
Size Dependent ◽  
Supported Metal Clusters ◽  
Supported Metal

scholarly journals A Microscopy Approach to Investigating the Energetics of Small Supported Metal Clusters

2018 ◽  
Vol 122 (39) ◽  
pp. 22569-22576 ◽  
Author(s):  
Barbara A. J. Lechner ◽  
Fabian Knoller ◽  
Alexander Bourgund ◽  
Ueli Heiz ◽  
Friedrich Esch
Keyword(s):  
Metal Clusters ◽  
Supported Metal Clusters ◽  
Supported Metal
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