Preparing method for Pt-Co flower-type nano-catalyst

Abstract

The invention discloses a preparing method for a Pt-Co flower-type nano-catalyst. The preparing method includes the following steps that 1, methylbenzene and oleylamine are added into a reaction kettle, and then cobalt acetylacetonate and a tributyl-borane-ammonia complex compound are added; after the mixture is stirred for 15 minutes to 30 minutes, the reaction kettle is put into a drying oven; Co nano-particles are obtained after the reaction is carried out for 6 hours to 12 hours at the temperature of 140 DEG C to 160 DEG C; 2, octadecylamine is added into a reactor and dissolved, and then the obtained Co nano-particles obtained in the step 1 and a tributyl-borane-ammonia complex compound are added; after stirring is carried out for 0.5 hour to 2 hours, a pentanedione platinum derivative is added; heating is stopped after the temperature rises to 150 DEG C to 170 DEG C and reacting is carried out for 0.5 hour to 2 hours, and the Pt-Co flower-type nano-catalyst is obtained after a product is washed. The Pt-Co flower-type nano-catalyst is prepared through a two-step reaction, and the catalytic performance is much higher than that of commercial platinum black.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and more specifically relates to a preparation method of a Pt-Co flower-shaped nano-catalyst. Background technique [0002] Platinum is currently known as the metal element with the best adsorption and dissociation catalytic activity for various fuels used in fuel cells, and it is also the electrode material with the most stable performance in the fuel cell environment. However, platinum as a fuel cell catalyst has the following main problems: First, the precious metal platinum is a scarce resource, and the known reserves on the earth are very limited, so the high price greatly increases the cost of fuel cells and limits Commercial application; the second is that the fuels used in various fuel cells, such as formic acid, methanol, ethanol, etc., require an overpotential for oxidation on the surface of a platinum electrode that is much greater than their thermodynamic potential, makin...

AI Technical Summary

Problems solved by technology

However, platinum as a fuel cell catalyst has the following main problems: First, the precious metal platinum is a scarce resource, and the known reserves on the earth are very limited, so the high price greatly increases the cost of fuel cells and limits Commercial application; the second is that the fuels used in various fuel cells, such as formic acid, methanol, ethanol, etc., require an overpotential for oxidation on the surface of a platinum electrode that is much greater than their thermodynamic potential, making the catalyst easily poisoned and deactivated

Not only these existing preparation methods need to be perfected, but there are still some difficult problems and challenges in the field of synthesis of metal hollow nanostructures.

Since nanoparticles tend to form more stable structures composed of lower-energy faces, it is still challenging to prepare flower-like or dendritic nanostructures with high active facets.

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