Platinum catalyst based on metal-carrier strong interaction and preparation and application thereof

Abstract

The invention relates to a preparation method of a supported platinum titanium dioxide catalyst based on strong interaction of metal and a carrier and an application of the supported platinum titaniumdioxide catalyst in selective hydrogenation reaction. The catalyst is prepared by taking titanium dioxide as a carrier and a platinum compound as a precursor through an ultraviolet light reduction method, and after hydrogen atmosphere reduction, platinum nanoparticles and the titanium dioxide carrier generate strong metal carrier interaction. The characterization results show that the catalyst contains platinum single atoms and platinum nanoparticles loaded on the surface of a carrier, after reduction, the platinum nanoparticles are embedded by the carrier, and the single atoms stably exist,so that the nanoparticles are prevented from further agglomeration to influence the reaction performance, and meanwhile, a Pt-Ti interface is increased. The catalyst is applied to a selective hydrogenation reaction, and the selectivity is greatly improved. The preparation method provided by the invention is simple and easy to implement, the exposed active sites can be regulated and controlled, theactivity and selectivity of the reaction are improved, and the preparation method has an excellent application prospect.

Description

technical field

[0001] The invention relates to a preparation method of a platinum catalyst based on the strong interaction of metal supports and its application in selective hydrogenation reaction. Specifically, titanium dioxide is used as a carrier, and the active component is a platinum catalyst that generates a metal carrier after reduction. Strong interaction, the platinum single atom remains stable, and the platinum nanoparticles are wrapped by the carrier to prevent agglomeration, which can improve the selectivity of the hydrogenation reaction of the catalyst and obtain a high-temperature stable catalyst. Background technique

[0002] Supported catalysts are widely used in the chemical industry and are very important in heterogeneous catalysis. Platinum group metal catalysts are widely used in large-scale industrial applications, including oxidation reactions, hydrogenation reactions, hydrocarbon rearrangement reactions, etc., exhibiting excellent catalytic activity. ...

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