Platinum/graphene nano electro-catalyst and preparation method thereof

Abstract

The invention discloses a platinum / graphene nano electro-catalyst. The platinum / graphene nano electro-catalyst uses graphene as a carrier and uses platinum as an active component, wherein the mass fraction of the platinum in the catalyst is 10 to 40 percent. A preparation method comprises the following steps: 1) ultrasonically dispersing an oxidized graphite nano sheet into liquid polyalcohol, then adding chloroplatinic acid solution and sodium acetate solution into the liquid polyalcohol, and fully mixing the solution uniformly, wherein the content of the oxidized graphite nano sheet in the mixture is between 0.48 and 1.3 g / L, the concentration of the chloroplatinic acid is between 0.0005 and 0.005 mol / L and the concentration of the sodium acetate is between 0.007 and 0.013 mol / L; and 2) transferring the mixture to a microwave hydrothermal reaction kettle, heating the mixture by microwave to react for 5 to 10 minutes, and then filtering, washing and drying the reaction product to obtain the platinum / graphene nano electro-catalyst. The preparation method of the invention has the advantages of energy conservation, quickness, simple process and the like. The particle diameters of the platinum nano particles in the prepared platinum / graphene nano electro-catalyst are uniform. The catalyst has good electro-catalysis performance, and has wide application in a fuel cell.

Description

technical field [0001] The invention relates to a platinum / graphene nano electrocatalyst and a preparation method thereof. Background technique [0002] Platinum / carbon materials with carbon-supported platinum metal nanoparticles have been widely used as catalysts in chemical engineering, especially as electrocatalysts in fuel cells, due to their excellent catalytic properties. It is well known that the catalyst support has a great influence on the performance of the catalyst. Activated carbon, XC-72 nanocarbon, carbon nanotubes, etc. are some carbon materials with different forms and shapes, and they are also commonly used catalyst supports. These different carbon materials as supports to support noble metal Pt nanoparticles have a great influence on the electrocatalytic performance of the catalysts. XC-72 nano carbon is a commercial nano carbon material, which is widely used as fuel cell catalyst carrier. Carbon nanotubes have also been extensively studied as catalyst s...

AI Technical Summary

Problems solved by technology

However, the polymer-protected metal nanoparticles obtained by this method are difficult to directly support on carbon supports.

At the same time, as an application in the field of catalysts, the polymer protective agent must be removed at high temperature, and the metal nanoparticles will reunite during high temperature treatment, which will affect the electrocatalytic performance of the catalyst.

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