Hydrogen Activation and Metal Hydride Formation Trigger Cluster Formation from Supported Iridium Complexes

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

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