Preparation And Application Of Cobalt Nanoparticles Supported By Carbon Materials And Bimetallic Cyanide Catalysts

Transition metals have been extensively studied as the catalysis.Heterogeneous catalysts have been widely studied because they can be recycled and reused in industry.This paper is divided into two parts to prepare different heterogeneous catalysts and explore their catalytic properties.The main contents are as follows:1?A nitrogen-doped porous carbon materials(CPNs)with supported Co nanoparticles(Co@CPNs)with lamellar structure,high surface area and excellent magnetic properties was synthesized successfully by one-pot method.The Co@CPNs exhibited an excellent catalytic activity with 99% conversion and selectivity for hydrogenation of furfural(FAL)to furfuryl alcohol(FOL)under the pressure of H2.Meanwhile,the prepared Co@CPNs could be easily separated and recycled from the reaction system by an external magnetism and reutilized for at least four runs without a distinct reduction for the activity of the catalysts.In addition,the Co@CPNs were further investigated in the kinetic study and selective hydrogenation of the other ?,? unsaturated carbonyl compounds.The study of the Co@CPNs indicated that it was suitable for selective hydrogenation of the ?,? unsaturated carbonyl compounds in the industry.2?Methods of conversion of carbon dioxide into valuable chemicals are of great demands but their development is still challenging.Herein,we developed an efficient green and facile synthetic method for the preparation of a Double metal cyanide.The target catalyst performs high catalytic activity for the cyclic reaction of carbon dioxide and epoxide under solvent free and ordinary pressure.Meanwhile,the effect of morphology of different catalyst were also investigated by the kinetic and thermodynamic study.In addition,the catalyst can be recycled and reused at least five successive cycles without significant decrease in the catalytic activity.This target catalyst thus represents one of the efficient and recyclable systems reported for the cyclic reaction in industry.