A kind of preparation method of cerium oxide/copper oxide composite nano-film catalyst

Abstract

The invention provides a method for preparing a novel cerium oxide / copper oxide composite nanometer film catalyst. According to the method, the load rate of CuO can be effectively improved to 50 percent, the reaction temperature for catalyzing CO can be reduced to 100 DEG C, and the catalytic activity of a CeO2 / CuO catalyst is greatly improved. The method comprises the following steps: heating a mixed solution containing cerous nitrate, copper nitrate and a material for improving the solution viscosity to form a transparent solution, and spreading the obtain solution on a pretreated template; treating the template containing a mixed material at the high temperature, so as to obtain the novel cerium oxide / copper oxide composite nanometer film catalyst; observing the phase structure and the morphology of the material through X-ray diffraction patterns and scanning electron micrographs; and finally, determining the influence of the change of the phase structure and the morphology of the material on a catalytic performance of the material by using a method for detecting the CO conversion rate and the reaction temperature.

Description

technical field [0001] The invention relates to a simple and effective carbon monoxide (CO) oxidation catalyst, in particular to a preparation method of a cerium oxide / copper oxide composite nano film. Background technique [0002] In recent years, the catalytic oxidation of carbon monoxide (CO) has received great attention and can be widely used in various fields, including: control of automobile exhaust pollution, removal of trace CO in closed environments, CO 2 Gas purification for lasers, CO gas sensors and fuel cells. Noble metal catalysts, such as gold (Au), platinum (Pt), and palladium (Pd), have been proven to be able to catalyze the oxidation of CO at lower temperatures, but noble metals are expensive, scarce in resources, and prone to sulfur poisoning, making people increasingly More attention has been paid to lower cost transition metal catalysts. such as CeO 2 / CuO catalysts, due to their high activity, high selectivity, and low price, have been widely studied...

AI Technical Summary

Problems solved by technology

At present, the catalytic activity of the material is the best when the loading of CuO is about 10% under the traditional preparation method, and continuing to increase the content of CuO still cannot improve the catalytic activity of the material.

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