Co3O4 Nanoparticles Supported on Mesoporous Carbon for Selective Transfer Hydrogenation of ,-Unsaturated Aldehydes

A simple and scalable method for synthesizing Co3O4 nanoparticles supported on the framework of mesoporous carbon (MC) was developed. Benefiting from an ion-exchange process during the preparation, the cobalt precursor is introduced into a mesostructured polymer framework that results in Co3O4 nanoparticles (ca. 3nm) supported on MC (Co3O4/MC) with narrow particle size distribution and homogeneous dispersion after simple reduction/pyrolysis and mild oxidation steps. The as-obtained Co3O4/MC is a highly efficient catalyst for transfer hydrogenation of ,-unsaturated aldehydes. Selectivities towards unsaturated alcohols are always higher than 95% at full conversion. In addition, the Co3O4/MC shows high stability under the reaction conditions, it can be recycled at least six times without loss of activity.