Preparation method of zirconium dioxide-based platinum oxide catalyst with core-shell structure

Abstract

The invention discloses a preparation method of a zirconium dioxide-based platinum oxide catalyst with a core-shell structure, which specifically comprises the following steps of: firstly, adding zirconium chloride into absolute ethyl alcohol, adding ethyl cellulose, carrying out ultrasonic dispersion and reduced pressure distillation to form viscous slurry, and adding the viscous slurry into a mold to form prefabricated particles; adding ethyl cellulose into absolute ethyl alcohol, and carrying out ultrasonic dispersion; spraying the obtained solution into the prefabricated particles, and carrying out constant-temperature standing reaction to obtain first coated particles; adding platinum chloride into distilled water, spraying the obtained solution on the first coated particles, standing at constant temperature for reaction, and repeating spraying-constant temperature standing for several times to obtain second coated particles; and finally, putting the second coated particles into a reaction kettle for reaction to obtain a prefabricated catalyst, and performing constant-temperature illumination reaction to obtain the zirconium dioxide-based platinum oxide catalyst. The zirconium dioxide-based platinum oxide catalyst with the shell-core structure prepared by the method can reflect external light to the inner surface of the catalyst, so that the catalytic efficiency is effectively improved, and the service life can be greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of catalytic preparation, and in particular relates to a preparation method of a zirconium dioxide-based platinum oxide catalyst with a core-shell structure. Background technique [0002] Zirconium dioxide has high thermal stability, good mechanical strength, and strong interaction with supported metals. It can be used as an excellent catalyst carrier and is widely used in heterogeneous catalytic reactions. The increase of its surface area is beneficial to improve the dispersion of the loaded metal active components, generate more reactive sites, and then improve the reactivity. On the basis of high specific surface area, ZrO 2 Realizing the functionalization of morphology and structure can further enhance its application value. [0003] Jin et al. disclosed a hollow spherical mesoporous ZrO with nanocube Pd inside. 2 Catalyst, ZrO 2 The mesoporous structure on the shell greatly strengthens the diffusion...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a zirconia-based platinum oxide catalyst with a core-shell structure, which solves the problem of low catalytic activity of existing platinum oxide catalysts and the use of The problem of short life