Process for producing direct methanol fuel cell electro-catalyst

A methanol fuel cell and electrocatalyst technology, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as agglomeration of metal particles, and achieve the effect of a simple preparation method

Inactive Publication Date: 2008-07-16
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in the end, the removal of these functional molecules, surfactants, and stabilizers also needs to be carried out at a certain temperature, so it is easy to lead to the agglomeration of metal particles after loading

Method used

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  • Process for producing direct methanol fuel cell electro-catalyst
  • Process for producing direct methanol fuel cell electro-catalyst
  • Process for producing direct methanol fuel cell electro-catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 1 gram of chloroplatinic acid and 1 gram of sodium hydroxide in 50 mL of ethylene glycol solution, and then ultrasonically disperse and mix uniformly; blow nitrogen for 15 minutes to remove air, and then heat to reflux in an oil bath at 130°C for 3 hours under a nitrogen atmosphere, during which time Electromagnetic stirring was continued; after the temperature dropped to room temperature, the ventilation was stopped, and 3.76 mg / mL platinum sol was prepared.

[0022] The carbon nanotubes are soaked in concentrated hydrochloric acid for 24 hours, then filtered and washed until the filtrate is neutral, and then dried at 100° C. for 2 hours to obtain a purified carbon nanotube carrier. Then put the carbon nanotubes into a round bottom flask, heat NaOH (3mmol / L) at 70°C for 1 hour, centrifuge, filter until the filtrate is neutral, and dry at 100°C for 2 hours; then place the volume ratio at 3:1 Concentrated HNO 3 Hwanon H 2 SO 4 In the mixed acid solution, heat reflux...

Embodiment 2

[0025]Dissolve 0.4 g of ruthenium trichloride and 1 g of sodium hydroxide in 50 mL of ethylene glycol solution respectively, and then disperse and mix uniformly by ultrasonic; bubbling nitrogen for 15 minutes to remove air; then heating and refluxing in an oil bath at 130°C for 3 hours under nitrogen atmosphere, during Electromagnetic stirring was continued; after the temperature dropped to room temperature, the ventilation was stopped, and 0.39 mg / mL ruthenium sol was prepared.

[0026] The carbon nanotubes are soaked in concentrated hydrochloric acid for 24 hours, then filtered and washed until the filtrate is neutral, and then dried at 100° C. for 2 hours to obtain a purified carbon nanotube carrier. Then put the carbon nanotubes into a round bottom flask, heat NaOH (3mmol / L) at 70°C for 1 hour, centrifuge, filter until the filtrate is neutral, dry at 100°C for 2 hours; then place the volume ratio at 3:1 Concentrated HNO 3 Hwanon H 2 SO 4 In the mixed acid solution, heat reflux...

Embodiment 3

[0028] This embodiment is the same as embodiment 1 except for the following features: heating and refluxing in an oil bath at 130°C under a nitrogen atmosphere for 3 hours.

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Abstract

The invention discloses a preparation method of an electrocatalyst of direct methanol fueled battery. A carbon nano tube carrier is purified and activated, and then a solution of platinum or platinum-ruthenium mixture nano particles is prepared; the carbon nano tube and platinum or platinum-ruthenium mixture are mixed in a mass ratio of 1: 0.02 to 1: 0.80: firstly, the carbon nano tube is dispersed with glycol, and added with the platinum or platinum- ruthenium mixture nano particle solution, then treated by 200 to 500W ultrasonic for 1 to 5 hours, thus the electrocatalyst of the direct methanol fueled battery is prepared. The preparation method of the electrocatalyst of the invention does not need surfactant, stabilizer or functional molecule, metal particles do not congregate at normal temperature and are loaded on high density small grain diameter of the carbon nano tubes.

Description

Technical field [0001] The invention relates to the field of catalysts, in particular to a method for preparing an electrocatalyst for a direct methanol fuel cell. Background technique [0002] Direct methanol fuel cell (DMFC) has received extensive attention due to its abundant fuel sources, low price, and relatively safe transportation and storage. However, the low catalytic activity of the anode catalyst and the poisoning effect of the carbonyl compound in the methanol oxidation intermediate have caused the development speed of the practical application of DMFC to have been relatively slow. The use of highly dispersed platinum and other precious metal nanoparticles loaded on the surface of carbon nanotubes as a DMFC catalyst has been widely studied. How to design and prepare noble metal particles on the surface of the tube wall with small particle size and uniform distribution is what many researchers consider. Currently, catalyst preparation methods mainly include the follo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/42B01J21/18H01M4/92
CPCY02E60/50
Inventor 李伟李伟善张庆龙黄幼菊
Owner SOUTH CHINA NORMAL UNIVERSITY
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