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Preparation method of electrocatalyst with nanoparticle structure for methanol fuel cell

A methanol fuel cell and electrocatalyst technology, applied in battery electrodes, nanotechnology, structural parts, etc., can solve the problems of poor activity of Pt catalysts and difficult removal of CO molecules, and achieve improved electrocatalytic activity, good contact, and energy consumption low effect

Inactive Publication Date: 2020-11-24
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the low potential state, the adsorbed CO molecules are difficult to be removed, resulting in poor activity of the Pt catalyst.

Method used

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  • Preparation method of electrocatalyst with nanoparticle structure for methanol fuel cell
  • Preparation method of electrocatalyst with nanoparticle structure for methanol fuel cell
  • Preparation method of electrocatalyst with nanoparticle structure for methanol fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step S1: Dissolve 25.1mg of platinum acetylacetonate, 67mg of copper acetylacetonate, 0.2g of cetyltrimethylammonium chloride and 0.2g of glucose in 30mL of oleylamine, stir and mix evenly at room temperature and transfer to an autoclave React at 180°C for 8 hours. After the reaction, wash the obtained black precipitate with absolute ethanol for 3-4 times to obtain a pure PtCu alloy nanoparticle catalyst, and ultrasonically disperse the PtCu alloy nanoparticle catalyst in an ethanol solution to obtain a spare solution;

[0029] Step S2: Add XC-72 carbon black to the standby solution obtained in step S1, stir and disperse evenly, and then let it stand at room temperature. After the supernatant is clarified, suck out the supernatant, and the black precipitate that settles to the bottom is placed in a vacuum drying oven Drying at 50° C. until the solvent is fully developed to obtain a PtCu alloy nanoparticle catalyst loaded on carbon black. It can be seen from FIG. 1 that ...

Embodiment 2

[0032] Step S1: Dissolve 52.7mg of platinum acetylacetonate, 42.5mg of copper acetylacetonate, 0.2g of cetyltrimethylammonium chloride and 0.2g of glucose in 30mL of oleylamine, stir and mix evenly at room temperature and transfer to a high-pressure reactor React at 180°C for 8 hours. After the reaction, wash the obtained black precipitate with absolute ethanol for 3-4 times to obtain a pure PtCu alloy nanoparticle catalyst, and ultrasonically disperse the PtCu alloy nanoparticle catalyst in an ethanol solution to obtain a reserve solution;

[0033] Step S2: Add XC-72 carbon black to the standby solution obtained in step S1, stir and disperse evenly, and then let it stand at room temperature. After the supernatant is clarified, suck out the supernatant, and the black precipitate that settles to the bottom is placed in a vacuum drying oven Dry at 50° C. until the solvent evaporates completely to obtain a PtCu alloy nanoparticle catalyst loaded on carbon black. Depend onfigure 2...

Embodiment 3

[0036] Step S1: Dissolve 76.2mg of platinum acetylacetonate, 27.9mg of copper acetylacetonate, 0.2g of cetyltrimethylammonium chloride and 0.2g of glucose in 30mL of oleylamine, stir and mix evenly at room temperature, and then transfer to a high-pressure reactor React at 180°C for 8 hours, wash with absolute ethanol for 3-4 times after the reaction to obtain a pure PtCu alloy nanoparticle catalyst, and ultrasonically disperse the PtCu alloy nanoparticle catalyst in an ethanol solution to obtain a reserve solution;

[0037] Step S2: Add XC-72 carbon black to the standby solution obtained in step S1, stir and disperse evenly, and then let it stand at room temperature. After the supernatant is clarified, suck out the supernatant, and the black precipitate that settles to the bottom is placed in a vacuum drying oven Dry at 50° C. until the solvent evaporates completely to obtain a PtCu alloy nanoparticle catalyst loaded on carbon black. Depend on image 3 It can be seen that the...

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Abstract

The invention discloses a preparation method of an electrocatalyst with a nanoparticle structure for a methanol fuel cell. The preparation method comprises the following steps: dissolving platinum acetylacetonate, copper acetylacetonate, hexadecyl trimethyl ammonium chloride and glucose into oleylamine; stirring and uniformly mixing at room temperature, transferring into a high-pressure reaction kettle, reacting for 8 hours at 180 DEG C, washing the obtained black precipitate with absolute ethyl alcohol for 3-4 times after the reaction is finished to obtain a pure PtCu alloy nanoparticle catalyst, and ultrasonically dispersing the PtCu alloy nanoparticle catalyst into an ethanol solution to obtain a standby solution. The synthetic method of the alcohol fuel cell electrocatalyst with the nanowire structure is simple to operate, high in reaction efficiency and low in energy consumption. The PtCu alloy nanoparticle catalyst has a large specific surface area and a large number of exposed active sites, can be in better contact with an electrolyte, and can effectively improve the electrocatalytic activity of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and in particular relates to a method for preparing an electrocatalyst with a nanoparticle structure for methanol fuel cells. Background technique [0002] With the development of society, environmental issues have been widely concerned, and there is an urgent need for a clean energy to replace traditional fossil fuels. Direct methanol fuel cells (DMFCs) have emerged as promising green energy devices with the advantages of high energy density and low pollutant emissions, making them ideal candidates to replace fossil energy. In alcohol fuel cells, catalysts are an important component and a key material that determines the performance of alcohol fuel cells. In recent years, platinum has been considered as the most suitable catalyst for alcohol fuel cells because of its high activity and stability, especially in acidic media. However, due to its high cost, its prospects in practical a...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88B82Y40/00
CPCB82Y40/00H01M4/8825H01M4/926Y02E60/50
Inventor 常方方任梦云杨林白正宇张庆
Owner HENAN NORMAL UNIV
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