Abstract: The present disclosure relates to a novel ruthenium oxide, a method of preparing the same, and a catalyst for selective hydrogenation of an aromatic compound or an unsaturated compound including the ruthenium oxide.

Abstract: The present disclosure relates to a method for preparing metal nanoparticles, and particularly, to a method for preparing metal nanoparticles, the method including reacting a hydrazine-carbon dioxide binded compound with a metal oxide or a metal ion compound.

Abstract: Disclosed is a method of capturing carbon dioxide using a hydrazine derivative.

Abstract: The present disclosure relates to a method for preparing metal nanoparticles, and particularly, to a method for preparing metal nanoparticles, the method including reacting a hydrazine-carbon dioxide binded compound with a metal oxide or a metal ion compound.

Abstract: The present invention relates to a method for preparing reduced graphene oxide from graphene oxide using a solid hydrazine derivative.

Abstract: The present invention relates to the synthesis of a novel compound, in which liquid hydrazine and the derivatives thereof react with excess carbon dioxide to enable the carbon dioxide to chemically bond to the hydrazine and the derivatives thereof. To this end, high-pressure carbon dioxide is used to synthesize hydrazine and the derivatives thereof to which the carbon dioxide is bonded in a pure form with no water and no by-product. Furthermore, the present invention provides a method for utilizing the above-described compounds by reacting the compounds with carbonyl compounds.

Abstract: Disclosed is a method of capturing carbon dioxide using a hydrazine derivative.

Abstract: The present application relates to a preparation method for solid powder of a carbamic acid derivative, which includes reacting an amine derivative with carbon dioxide at a temperature in a range of from about ?30° C. to about 500° C. and at a pressure in a range of from about 0.3 MPa to about 100 MPa. In addition, the present disclosure relates to a reduction method for solid powder of a carbamic acid derivative to an amine derivative and carbon dioxide, which includes dissolving solid powder of the carbamic acid derivative prepared in a solvent; refluxing the carbamic acid derivative at a temperature in a range of from about 30° C. to about 100° C.; and evaporating the solvent.

Abstract: The present application relates to a preparation method for solid powder of a carbamic acid derivative, which includes reacting an amine derivative with carbon dioxide at a temperature in a range of from about ?30° C. to about 500° C. and at a pressure in a range of from about 0.3 MPa to about 100 MPa. In addition, the present disclosure relates to a reduction method for solid powder of a carbamic acid derivative to an amine derivative and carbon dioxide, which includes dissolving solid powder of the carbamic acid derivative prepared in a solvent; refluxing the carbamic acid derivative at a temperature in a range of from about 30° C. to about 100° C.; and evaporating the solvent.

Abstract: The present invention relates to a method for preparing reduced graphene oxide from graphene oxide using a solid hydrazine derivative.

Abstract: The present application relates to a preparation method for solid powder of a carbamic acid derivative, which includes reacting an amine derivative with carbon dioxide at a temperature in a range of from about ?30° C. to about 500° C. and at a pressure in a range of from about 0.3 MPa to about 100 MPa. In addition, the present disclosure relates to a reduction method for solid powder of a carbamic acid derivative to an amine derivative and carbon dioxide, which includes dissolving solid powder of the carbamic acid derivative prepared in a solvent; refluxing the carbamic acid derivative at a temperature in a range of from about 30° C. to about 100° C.; and evaporating the solvent.

Abstract: The present disclosure relates to a method of preparing powder of a solid carbazic acid derivative, which involves inducing a reaction of a liquid hydrazine derivative with carbon dioxide at a high pressure of from about 0.5 MPa to about 100 MPa. During the reaction, the pressure may range from about 0.5 MPa to about 100 MPa. In this regard, although the reaction of the carbon dioxide with the liquid hydrazine derivative occurs when the pressure is adjusted to below than about 0.5 MPa, sticky precipitates in a form of gel are gradually produced but the powder is not produced.

Abstract: The present application relates to a preparation method for solid powder of a carbamic acid derivative, which includes reacting an amine derivative with carbon dioxide at a temperature in a range of from about ?30° C. to about 500° C. and at a pressure in a range of from about 0.3 MPa to about 100 MPa. In addition, the present disclosure relates to a reduction method for solid powder of a carbamic acid derivative to an amine derivative and carbon dioxide, which includes dissolving solid powder of the carbamic acid derivative prepared in a solvent; refluxing the carbamic acid derivative at a temperature in a range of from about 30° C. to about 100° C.; and evaporating the solvent.

Abstract: The present invention relates to the synthesis of a novel compound, in which liquid hydrazine and the derivatives thereof react with excess carbon dioxide to enable the carbon dioxide to chemically bond to the hydrazine and the derivatives thereof. To this end, high-pressure carbon dioxide is used to synthesize hydrazine and the derivatives thereof to which the carbon dioxide is bonded in a pure form with no water and no by-product. Furthermore, the present invention provides a method for utilizing the above-described compounds by reacting the compounds with carbonyl compounds.

Abstract: The present disclosure relates to a preparation method for powder of a carbamic acid derivative, which includes reacting a liquid amine derivative with carbon dioxide at a temperature in a range of from about ?30° C. to about 500° C. at a pressure in a range of from about 0.3 MPa to about 100 MPa. In addition, the present disclosure relates to a reduction method for powder of a carbamic acid derivative to a liquid amine derivative and carbon dioxide, which includes dissolving powder of the carbamic acid derivative prepared in a solvent; refluxing the carbamic acid derivative at a temperature in a range of from about 30° C. to about 100° C.; and evaporating the solvent.

Abstract: The present disclosure relates to a method of preparing powder of a solid carbazic acid derivative, which involves inducing a reaction of a liquid hydrazine derivative with carbon dioxide at a high pressure of from about 0.5 MPa to about 100 MPa. During the reaction, the pressure may range from about 0.5 MPa to about 100 MPa. In this regard, although the reaction of the carbon dioxide with the liquid hydrazine derivative occurs when the pressure is adjusted to below than about 0.5 MPa, sticky precipitates in a form of gel are gradually produced but the powder is not produced.

Abstract: The present invention relates to the macroporous manganese oxide material having ferromagnetic property and a method of preparing the same, more particularly to the macroporous ferromagnetic manganese oxide having three-dimensionally ordered nanopores, which is prepared by aligning colloidal polymer particles with an average diameter of a few hundred nanometers in 3D, infiltrating a solution of the precursor compound capable of forming manganese oxide represented by the following Chemical Formula 1 into interstices of the colloidal template and heating in an oxygen atmosphere to decompose and remove the polymer template, and a method for preparing the same: La1-xCax-ySryMnO3 ??(1) wherein 0.25<x<0.35 and 0<y?0.35.

Abstract: The present invention relates to a method for preparing manganese-based nitride having nearly zero temperature coefficient of resistivity and more particularly, to the effective method for preparing manganese-based nitride expressed by the formula (1), wherein the manganese-based nitride, prepared by heating the stoichiometric mixture of Mn2N and Cu in an evacuated quartz tube, provides some advantages in that i) the use of the Mn2N compound as a reactant, the formation of impurities and nitrogen evaporation may be prevented, and ii) through nitrogen is tightly bonded between metals, the manganese-based nitride has extremely low (46 ppm/K) temperature coefficient of resistivity.

Abstract: The present invention relates to a method for preparing manganese-based nitride having nearly zero temperature coefficient of resistivity and more particularly, to the effective method for preparing manganese-based nitride expressed by the formula (1), wherein the manganese-based nitride, prepared by heating the stoichiometric mixture of Mn2N and Cu in an evacuated quartz tube, provides some advantages in that i) the use of the Mn2N compound as a reactant, the formation of impurities and nitrogen evaporation may be prevented, and ii) through nitrogen is tightly bonded between metals, the manganese-based nitride has extremely low (46 ppm/K) temperature coefficient of resistivity.

Abstract: The present invention relates to a sodium-intervened superconductor and its manufacturing method and more particularly, to the sodium-intervened superconductor expressed by the following Formula 1 and its manufacturing method, wherein the superconductor, prepared from a stoichiometric mixture of Y.sub.2 O.sub.3, NaCuO.sub.2, BaCuO.sub.2, Ln.sub.2 O.sub.3 (Ln: lanthanide ion) and CuO under the atmosphere of oxygen, has some advantages in that a) through the use of NaCuO.sub.2, a ternary oxide, as a reactant, the formation of impurities and sodium evaporation may be prevent, and b) through partial substitution of a divalent barium by a trivalent lanthanide group ion, the superconductor is stable in air with a higher critical current density and critical temperature.Formula 1(Na.sub.1-x Y.sub.x)(Ba.sub.1-y Ln.sub.y).sub.2 Cu.sub.3 O.sub.6+.delta.wherein, Ln is a trivalent lanthanide ion other than Ce and Pr; 0.1<x<0.9; and 0.1<y<0.3.