COMPOSITE OF ULTRAFINE PARTICLE OF CERIUM-CONTAINING MESOPOROUS SILICA AND NOBLE METAL, PRODUCTION METHOD OF THE COMPOSITE, OXIDATIVE EXCLUSION METHOD OF MINUTE AMOUNT OF CARBON MONOXIDE BY USING THE COMPLEX AS CATALYST, AND SYNTHETIC METHOD OF KETONE BY OXIDATIVE DEHYDROGENATION OF ALCOHOL

摘要

PROBLEM TO BE SOLVED: To provide a high-performance catalyst capable of efficiently eliminating a minute amount of carbon monoxide in air or in a hydrogen gas, or a high-performance catalyst capable of efficiently synthesizing a ketone by oxidative dehydrogenation of an alcohol, and a production method thereof.

SOLUTION: An inorganic composite prepared by causing a cerium-containing mesoporous silica to carry superfine gold particles, especially superfine particles of which the diameters of almost all particles are 0.5-5 nm, is used as the catalyst. A method for causing a gold complex to be adsorbed by dispersing cerium-containing mesoporous silica in a solution of chlorauric acid adjusted to a pH value higher than 7.0 and lower than 10.0 or by contacting the solution with the cerium-containing mesoporous silica, is employed as the supporting method of gold in the composite.

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