The Study Of Ruthenium Nanoclusters Coated On The Layered Materials And Its Catalytic Properties

This thesis is focused on the load and catalysis of ruthenium nanoclusters.It is composed of the following three sections:(1) Colloid of poly (N-vinyl-2-yrrolidone) (PVP)-stabilized ruthenium nanocluster and powder of dialkydithiophosphate (DDP)-stabilized ruthenium nanocluster in alcohol / water mixed solvents were prepared by solvent thermal process; (2) Poly(N-vinyl-2-pyrrolidone) (PVP)-stabilized ruthenium nanocluster was introduced successfully into the interlayer space of Montmorillonite (MMT); (3) The catalytic properties of ruthenium nanoclusters were investigated under atmospheric condition.Colloid of poly (N-vinyl-2-yrrolidone) (PVP)-stabilized ruthenium nanocluster and powder of dialkydithiophosphate (DDP)-stabilized ruthenium nanocluster were prepared by refluxing RuCl3·nH2O by solvent thermal method in butanol or butanol-water mixed solvent. The obtained products were characterized by Ultraviolet Visible absorption spectrophotometry (UV-Vis), Transmission electron microscopy (TEM), X-ray photoelectron spectrometry (XPS) and X-ray diffraction spectrometry (XRD). The reaction of alcohol oxidation by molecular oxygen under atmospheric condition was selected as probe reaction to evaluate the catalytic activity of ruthenium nanoclusters, many effects of catalytic properties were investigated, including different coating agent, reaction temperature, the amount of catalyst. The reaction kinetics was also fitted. The results showed that PVP-coated ruthenium nanoclusters had a good catalytic performance on the ethanol oxidation reaction. The conversion rate is more than 90%, while the selectivity is up to 100%; The reaction order is 0.95, and the activation energy Ea is 42.41 kJ·mol^-1.The poly-N-vinyl-2-pyrrolidone (PVP) stabilized ruthenium nanoclusters were successfully intercalated into the layer space of montmorillonite (PVP-Ru-MMT) by ion exchange and in-situ reduction method. The obtained products were characterized were characterized by X-ray diffraction spectrometry (XRD), Transmission electron microscopy (TEM), Thermogravimetry (TG) to obtaine the information of structure and morphology. The reaction of benzyl alcohol oxidation by molecular oxygen under atmospheric condition was selected as probe reaction to evaluate the catalytic activity of the loaded ruthenium nanoclusters, and the reaction kinetics was also fitted. The results showed that the catalytic selectivity of PVP-Ru-MMT for the oxidation of benzyl alcohol mostly reached 100%, and the catalyst could be re-used. The reaction order is 0.49, and the activation energy Ea is 32.94 kJ·mol^-1.