III International Conference

PP-I-56HYDROGENATION CATALYST ON THE BASE OF NANOCOMPOSITE Ni@C am .SYNTHESIS AND PROPERTIES OF CARBON-ENCAPSULATED METALNANOPARTICLES (Me@C am , Me-Ni, Fe, Co, Al, Bi, Ag, Mg, Pd, Cu)Yermakov A.Ye., Uimin M.A., Mysik A.A., Mushnikov N.V.Institute of Metal Physics, Ural Branch of RAS, Ekaterinburg, RussiaE-mail: yermakov@imp.uran.ruMetal-carbon nanocomposites on the base of different metals (Ni, Fe, Co, Al, Bi, Ag, Mg,Pd, Cu) were synthesized using gas condensation technique. Structure, morphology, physicaland chemical properties of these composites were investigated. Ni@C am nanocomposites werefound to reveal extremely high catalytic activity in the reaction of magnesium hydrogenationduring mechanical milling at room temperature.The synthesis and investigation of metal carbon-encapsulated nanoparticles has attractedmuch attention due to potential technological applications, particularly, in magnetic storagemedia, in biotechnology, medicine and as catalyst materials for chemical processes. A veryimportant feature of such nanocomposites is that the carbon-encapsulated nanoparticles areeffectively protected from degradation since the carbon shell prevents interaction withenvironment.At present the investigations of carbon-encapsulated metal nanoparticles have mainlyfocused on the preparation technique and characterization of nanocomposites, while little isknown about their physical and chemical properties (for instance, catalytic activity andothers).In the given talk we report a new method of synthesis of the relatively stable carbonencapsulatedmetal nanoparticles and the results of investigation of their physical andchemical properties.Using the gas-condensation technique we succeed to prepare the nanocompositesMe@C am in which different metals (Me = Ni, Fe, Co, Al, Bi, Ag, Mg, Pd, Cu and others) areencapsulated (@) in the carbon matrix C am .X-ray diffraction analysis, transmission electron microscopy, Raman spectroscopy andmagnetic measurements were used to investigate the structure and physical properties of theobtained metal-carbon nanocomposites. It was shown that the structural state of carbon andquality of coating depends on synthesis regimes and type of the coated metal. The thicknessof carbon coating amounts to few nanometers and depends on the type of metal, whereas thecarbon structure was found to be amorphous (“glassy”) for all metals. The average particle105