Preparation method of titanium-doped platinum catalyst with high catalytic activity

Abstract

The invention discloses a preparation method of a titanium-doped platinum catalyst with high catalytic activity. The preparation method comprises the following steps: firstly, preparing a platinum precursor solution and a titanium precursor solution; then, dispersing a porous carbon nano tube in the platinum precursor solution, and doping a metal oxide foaming body catalytic framework into the titanium precursor solution; spraying the platinum precursor solution dispersed with the carbon nano tube on the titanium-doped metal oxide foaming body catalytic framework; and finally, calcining at a high temperature to obtain the titanium-doped platinum catalyst. According to the preparation method, a metal oxide foaming body and the carbon nano tube are used as dual carriers for loading platinum and the doping of the titanium is carried out, so that an agglomeration phenomenon caused by the fact that only the carbon nano tube is used as the carrier is avoided, and the problems that when only the metal oxide foaming body is used as the carrier, the active component platinum has poor bonding force on the carrier and is easy to fall off are also avoided, so that the active component platinum is uniformly dispersed, the catalytic activity of the catalyst is improved and the service life of the catalyst is prolonged. Furthermore, the preparation method has the advantages of energy conservation and environment friendliness, is easy to control and can be widely applied to the preparation of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a preparation method of a titanium-doped platinum catalyst with high catalytic activity. Background technique [0002] Platinum group metal catalysts have good catalytic performance, occupy an extremely important position in petrochemical and organic synthesis, and are widely used in reactions such as hydrogenation, dehydrogenation, oxidation, reduction, isomerization, aromatization, and cracking. The catalytic performance of the catalyst, in addition to depending on the composition and content of the catalyst, is also closely related to the preparation method and process conditions of the catalyst. The same raw material, the same composition and content, different preparation methods, the activity and thermal stability of the catalyst There can be big differences. Therefore, it is of great significance to study the preparation methods of platinum-based ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a titanium-doped platinum catalyst with high catalytic activity, which solves the problems in the prior art that the catalysts prepared by traditional precipitation and impregnation methods have a wide particle range, large particle size, and platinum dispersion. The technical problems of low catalyst activity and short service life caused by low catalyst