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Preparation method for small-size high-dispersion fuel battery catalyst

A fuel cell and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, battery electrodes, etc., can solve the problems of complex process flow, low dispersion and harsh conditions for the preparation of Pt nanoparticle catalysts, and achieve production costs. Inexpensive, highly dispersed, mild effects

Inactive Publication Date: 2013-11-20
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a small-sized highly dispersed fuel cell catalyst for the existing Pt nanoparticle catalyst preparation process complex, harsh conditions, large size and low dispersion.

Method used

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  • Preparation method for small-size high-dispersion fuel battery catalyst
  • Preparation method for small-size high-dispersion fuel battery catalyst
  • Preparation method for small-size high-dispersion fuel battery catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Functional treatment of carbon support

[0028]Weigh 1 gram of commercially available Vulcan XC-72 carbon powder, add 150 ml of a mixed solution of hydrogen peroxide and concentrated sulfuric acid with a volume ratio of 1:4, wherein the mass percent concentration of hydrogen peroxide is 30%, and stir with ultrasonic oscillation After 3 hours, dilute it with ultrapure water, let it stand for 24 hours, filter out the supernatant, and get the functionalized Vulcan XC-72 carbon powder after several times of centrifugal washing, drying, and grinding.

[0029] (2) Preparation of NiFe / C nanoparticles

[0030] Weigh nickel acetylacetonate, Iron acetylacetonate, oleic acid, sodium hydroxide, sodium borohydride and functionalized Vulcan XC-72 carbon powder, nickel acetylacetonate, iron acetylacetonate, oleic acid, sodium hydroxide and 75mL ethylene glycol were added to a 250mL three-necked flask , raise the temperature to 130°C while stirring under a nitrogen atmosphere, ke...

Embodiment 2

[0035] Step (1) is the same as step (1) in Example 1.

[0036] (2) Preparation of NiFe / C nanoparticles

[0037] Weigh nickel acetylacetonate, Iron acetylacetonate, oleic acid, sodium hydroxide, sodium borohydride and functionalized Vulcan XC-72 carbon powder, nickel acetylacetonate, iron acetylacetonate, oleic acid, sodium hydroxide and 50mL ethylene glycol were added to a 250mL three-necked flask , raise the temperature to 110°C while stirring under a nitrogen atmosphere, keep it for 1.5 hours, and then continue to heat up to 150°C, slowly add sodium borohydride to the above mixed solution, the addition time is controlled at 10 minutes, after the addition is completed, at 150°C Continue to react for 20 minutes, then cool the reaction solution to 70°C, add functionalized Vulcan XC-72 carbon powder, stir and adsorb for 12 hours, wash the product with absolute ethanol for 3 times, vacuum dry at 70°C for 6 hours, and grind it NiFe / C nanoparticles were obtained.

[0038] (3) Pr...

Embodiment 3

[0043] Step (1) is the same as step (1) in Example 1.

[0044] (2) Preparation of NiFe / C nanoparticles

[0045] According to the mass ratio of nickel acetylacetonate: iron acetylacetonate: oleic acid: sodium hydroxide: sodium borohydride: functionalized Vulcan XC-72 carbon powder is 1: 1.375: 0.022: 0.016: 7.363: 1.557 respectively take nickel acetylacetonate, Iron acetylacetonate, oleic acid, sodium hydroxide, sodium borohydride and functionalized Vulcan XC-72 carbon powder, nickel acetylacetonate, iron acetylacetonate, oleic acid, sodium hydroxide and 100mL ethylene glycol were added to a 250mL three-necked flask , raise the temperature to 120°C while stirring under a nitrogen atmosphere, keep it for 2 hours, and then continue to heat up to 140°C, slowly add sodium borohydride to the above mixed solution, the addition time is controlled at 15 minutes, after the addition is completed, at 140°C Continue to react for 30 minutes, then cool the reaction solution to 80°C, add fun...

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Abstract

The invention provides a preparation method for a small-size high-dispersion fuel battery catalyst and belongs to the technical field of fuel batteries. The preparation method comprises the following steps of: preparing NiFe / C nano particles by a colloidal method, then adding a platinum precursor, dissolving and releasing a large number of electrons through a cathode with the NiFe nano particles to make the whole carbon carrier be a giant reducer for quickly reducing platinum ions adsorbed to the surface of the carbon carrier, and forming the small-size and high-dispersion Pt / C catalyst. The method is simple, feasible and low in production cost; the catalyst prepared by the method can be applied to the fuel battery taking a proton exchange membrane as an electrolyte. The fuel battery manufactured by the method can be widely applied to electric automobiles, various aircrafts and portable electronic equipment such as cameras, notebook computers and electric toys.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a method for preparing a small-sized highly dispersed fuel cell catalyst. Background technique [0002] Fuel cells convert chemical energy directly into electrical energy through chemical reactions, and have the advantages of high energy conversion efficiency, low pollution, low noise, adjustable power generation, wide selection of energy storage materials, and high reliability. New energy technologies that have the potential to replace existing energy technologies on a large scale. At present, fuel cells are difficult to popularize due to the high operating cost due to the large use of noble metal Pt. In the absence of a non-precious metal catalyst with catalytic performance comparable to that of Pt, it is very urgent to reduce the amount of Pt and increase the utilization of Pt. However, reducing the amount of Pt and improving the utilization of Pt can start from the persp...

Claims

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Application Information

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IPC IPC(8): B01J23/42H01M4/92
CPCY02E60/50
Inventor 魏子栋王紫娟陈四国丁炜汪虹敏张薇薇
Owner CHONGQING UNIV
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