Precious metal platinum nanometer catalyst and preparation method and application thereof

Abstract

The invention discloses a precious metal platinum nanometer catalyst and a preparation method and application thereof. Precious metal platinum nanometer particles are loaded on oxide of transition metal iron, and meanwhile graphene oxide is used as the whole substrate of the precious metal platinum nanometer particles and the oxide of transition metal iron to achieve even scattering. The catalyst has the advantages of being easy to prepare, wide in using range and the like. After the catalyst is directly roasted for 2 h at 350-850 DEG C in air or nitrogen, the particle size of the catalyst Pt particles is still kept being 3-5 nm; the problem that the Pt catalyst is likely to be sintered and lose activity in the reaction at the high temperature of 750 DEG C or above is solved, and the high-temperature catalysis application such as automobile tail gas treatment and other high-temperature reactors is broadened.

Description

technical field [0001] The invention belongs to the technical field of nano-catalysts, and in particular relates to a noble metal platinum nano-catalyst with high-temperature anti-sintering performance and a preparation method and application thereof. Background technique [0002] Platinum nanocrystals are widely concerned nanocatalysts. Because of their large specific surface area, high surface energy, short diffusion channels in the crystal, many catalytic active sites on the surface, and strong adsorption capacity, the reaction rate can be controlled. Size and facet structure have a crucial influence on catalytic activity. In most practical catalytic reactions, the operating temperature may be too high. However, under high temperature conditions, small-sized platinum nanocrystals (<10 nm) are prone to agglomeration and deactivation, which greatly limits its application. Improving the anti-sintering performance of supported noble metal nanocatalysts at high temperature...

AI Technical Summary

Problems solved by technology

In most practical catalytic reactions, the operating temperature may be too high. However, under high temperature conditions, small-sized platinum nanocrystals (<10 nm) are prone to agglomeration and deactivation, which greatly limits its application.

Improving the anti-sintering performance of supported noble metal nanocatalysts at high temperatures (≥750°C) is a difficult research problem, and there is no report on the anti-sintering of platinum nanocatalysts at high temperatures (≥750°C).

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