Narrowly dispersed silica supported osmium nanoparticles prepared by an organometallic approach: H2 and CO adsorption stoichiometry and hydrogenolysis catalytic activity

Jia En Low; Annette Foelske-Schmitz; Frank Krumeich; Michael Wörle; David Baudouin; Fernando Rascón; Christophe Copéret

doi:10.1039/c3dt50980j

Narrowly dispersed silica supported osmium nanoparticles prepared by an organometallic approach: H2 and CO adsorption stoichiometry and hydrogenolysis catalytic activity

Dalton Trans. 2013 Sep 21;42(35):12620-5. doi: 10.1039/c3dt50980j.

Authors

Jia En Low¹, Annette Foelske-Schmitz, Frank Krumeich, Michael Wörle, David Baudouin, Fernando Rascón, Christophe Copéret

Affiliation

¹ ETH Zurich, Department of Chemistry, Wolfgang-Pauli-Strasse 10, CH-8093, Zurich, Switzerland.

PMID: 23722668
DOI: 10.1039/c3dt50980j

Abstract

Osmium(cyclooctadiene)(cyclooctatetraene) is used as a molecular precursor to prepare small and narrowly distributed silica supported nanoparticles upon a mild treatment under H2 (1.1 ± 0.3 nm, ca. 90 atoms). Static volumetric chemisorption combined with HAADF-STEM shows that Os nanoparticles adsorb 1.7 ± 0.1 H and 1.4 ± 0.1 CO per surface atom. These particles present high activity in the hydrogenolysis of alkanes via a dimetallacyclopentane mechanism.