Hydrogen Activation and
Metal Hydride Formation Trigger
Cluster Formation from Supported Iridium Complexes
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Abstract
The formation of iridium clusters from supported mononuclear
iridium
complexes in H<sub>2</sub> at 300 K and 1 bar was investigated by
spectroscopy and atomic-resolution scanning transmission electron
microscopy. The first steps of cluster formation from zeolite-supported
Ir(C<sub>2</sub>H<sub>4</sub>)<sub>2</sub> complexes are triggered
by the activation of H<sub>2</sub> and the formation of iridium hydride,
accompanied by the breaking of iridium–support bonds. This
reactivity can be controlled by the choice of ligands on the iridium,
which include the support