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Carbon-nanotube-loaded platinum-iron superlattice alloy nanoparticles and preparation method therefor

A technology of alloy nanoparticles and carbon nanotubes, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as difficult application and low catalytic stability, and achieve improved activity and stability. , The effect of simple equipment process and safe operation

Active Publication Date: 2016-04-13
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that carbon-supported platinum-iron alloy nanoparticles have low catalytic stability in acidic system and are difficult to be practically applied, improve the atomic arrangement of the alloy through a simple and easy-to-operate method, and improve the catalytic performance of the catalyst for oxygen reduction reaction. activity and stability

Method used

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  • Carbon-nanotube-loaded platinum-iron superlattice alloy nanoparticles and preparation method therefor
  • Carbon-nanotube-loaded platinum-iron superlattice alloy nanoparticles and preparation method therefor
  • Carbon-nanotube-loaded platinum-iron superlattice alloy nanoparticles and preparation method therefor

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Effect test

Embodiment 1

[0026] 1) Mix 150mL of concentrated sulfuric acid and 50mL of concentrated nitric acid, add 1g of carbon nanotubes into the mixed acid, heat to 70°C under stirring, and react for 5 hours;

[0027] 2) Slowly add the mixed solution after the reaction in step 1) into 1000mL deionized water under stirring conditions, separate the solid and liquid components by suction filtration, and dry the solid in a vacuum oven at 60°C for 12 hours to obtain acidified carbon nanotube;

[0028] 3) Take 50 mg of acidified carbon nanotubes obtained in step 2), put them in a three-necked flask, add 100 mL of ethylene glycol, and ultrasonically disperse for 30 minutes, dissolve 33.5 mg of chloroplatinic acid and 12 mg of ferrous nitrate in the above dispersed carbon In the ethylene glycol of nanotubes, continue to sonicate for 30 minutes to mix evenly;

[0029] 4) Heat the mixed solution in step 3) to 80°C under stirring, add 500mL, 0.1mol / L sodium borohydride aqueous solution, and keep heating to ...

Embodiment 2

[0034] 1) Mix 120mL of concentrated sulfuric acid and 40mL of concentrated nitric acid, add 0.8g of carbon nanotubes into the mixed acid, heat to 60°C under stirring, and react for 10 hours;

[0035] 2) Slowly add the mixed liquid after the reaction in step 1) into 1000mL deionized water under stirring conditions, separate the solid and liquid components by suction filtration, and dry the solid in a vacuum oven at 80°C for 10 hours to obtain acidified carbon nanotube;

[0036] 3) Take 80 mg of acidified carbon nanotubes obtained in step 2), put them in a three-necked flask, add 150 mL of ethylene glycol, and ultrasonically disperse for 30 minutes, dissolve 38.6 mg of chloroplatinic acid and 15.2 mg of ferrous nitrate in the above dispersed solution In the ethylene glycol of carbon nanotubes, continue to sonicate for 30 minutes to mix evenly;

[0037] 4) Heat the mixed solution in step 3) to 80°C under stirring, add 300mL, 0.1mol / L sodium borohydride aqueous solution, and keep...

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Abstract

The invention relates to carbon-nanotube-loaded platinum-iron superlattice alloy nanoparticles used for an oxygen reduction reaction of a proton film fuel cell negative electrode, and a preparation method for the nanoparticles. Chloroplatinic acid and ferrous nitrate are used as a precursor; carbon-nanotube-loaded platinum-iron alloy nanoparticles are obtained by adopting a sodium borohydride reduction method implemented in an ethylene glycol solution; then the carbon-nanotube-loaded alloy nanoparticles are subjected to thermal annealing processing in an inert gas atmosphere to convert the carbon-nanotube-loaded alloy nanoparticles into the carbon-nanotube-loaded platinum-iron superlattice alloy nanoparticles. The method is simple in process, safe in operation, free of reduction gas in the thermal annealing process, and high in controllability; and the activity and the stability of the catalyst oxidization reduction reaction of the obtained product catalyst are both improved at a relative high degree.

Description

technical field [0001] The invention belongs to the field of electrocatalysts, and in particular relates to a carbon nanotube-loaded platinum-iron superlattice alloy nanoparticle used in the cathode oxygen reduction reaction of a proton membrane fuel cell and a preparation method thereof. Background technique [0002] With the rapid growth of population and industry, the problems of environmental pollution and energy shortage have become increasingly prominent, and the development of efficient and clean energy conversion devices has become a hot and difficult point in the current scientific and technological development. Proton membrane fuel cells have received extensive attention due to their high energy density, low operating temperature, high conversion efficiency, clean and pollution-free, and portability. However, the electrode reaction of the proton membrane fuel cell, especially the oxygen reduction reaction of the cathode has high overpotential, slow kinetics, and di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88B82Y30/00
CPCB82Y30/00H01M4/8882H01M4/921H01M4/926Y02E60/50
Inventor 王峰刘海静宋夜刘景军李志林吉静窦美玲覃事永王伟红康建忠
Owner BEIJING UNIV OF CHEM TECH
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