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Preparation method and application of heteropolyacid/macrocyclic compound/carbon electrocatalyst

A technology of macrocyclic compounds and electrocatalysts, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of complex preparation methods of modified electrodes, difficulty in applying proton exchange membrane fuel cells, and difficult experimental scale-up of modified electrodes, achieving a huge ratio Surface area, extended service life, good electrical conductivity

Inactive Publication Date: 2017-05-31
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation method of this modified electrode is relatively complicated, and the obtained modified electrode is difficult to scale up in experiments, and it is difficult to apply to proton exchange membrane fuel cells.

Method used

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  • Preparation method and application of heteropolyacid/macrocyclic compound/carbon electrocatalyst
  • Preparation method and application of heteropolyacid/macrocyclic compound/carbon electrocatalyst
  • Preparation method and application of heteropolyacid/macrocyclic compound/carbon electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Disperse 10 mg of carboxy-modified multi-walled carbon nanotubes in 25 mL of ethanol solution, add 10 mg of tetrakis (N-methylpyridyl) iron porphyrin and 20 mg of H 3 PMo 12 o 40 , sonicated at 25°C for 30min, filtered with suction, washed until the filtrate was neutral and colorless, and dried at 65°C to finally obtain a black powder solid.

[0024] Such as figure 1 , thermogravimetric analysis showed that the heteropolyacid / porphyrin structure in the complex after washing with deionized water would not be lost, that is, the quaternary ammonium cationic macrocyclic compound and the heteropolyacid formed a water-insoluble stable structure.

[0025] Such as figure 2 , the heteropoly acid / iron porphyrin has been uniformly supported on the carbon nanotubes, and the black spots in the figure are the heteropoly acid / macrocyclic compound composite structure adsorbed.

[0026] Such as image 3 , the oxygen reduction reaction test adopts the standard three-electrode metho...

Embodiment 2

[0028] With 15mg carbon black, 2mg tetrakis (N-methylpyridyl) cobalt porphyrin, 4mg H 4 SiW 12 o 40 Add it into 30mL of methanol solution, disperse it by ultrasonication at 40°C for 15min, then filter and wash with deionized water until the filtrate is colorless and neutral. Vacuum drying at 65° C. for 6 h finally obtained a black powdery solid. The morphology and performance of the catalyst obtained in Example 2 are similar to those of the sample in Example 1, and it has better overall oxygen reduction performance.

Embodiment 3

[0030] 20mg carbon nanotubes, 2mg tetrakis (N-methylpyridyl) protoporphyrin, 30mg H7 PW 8 V 4 o 40 Add it into 5mL chloroform solution, ultrasonicate at 60°C for 20min to disperse, then filter and wash with deionized water until the filtrate is colorless and neutral. After vacuum drying at 65°C for 6 h, a black powdery solid was finally obtained. The morphology and performance of the catalyst obtained in Example 3 are similar to those of the sample in Example 1, and it has better overall oxygen reduction performance.

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Abstract

The invention provides a preparation method and application of a heteropolyacid / macrocyclic compound / carbon electrocatalyst, and belongs to the field of catalysts for proton exchange membrane fuel cells. A carbon material is dispersed into a solvent, the heteropolyacid and the macrocyclic compound are added, the mixture is subjected to ultrasonic treatment at the temperature of 10-80 DEG C for 0.1-2 hours, suction filtration and washing are conducted until a filtrate is neutral and colorless, and the filtrate is dried to obtain the heteropolyacid / macrocyclic compound / carbon electrocatalyst. The preparation method is simple in operation, easy in control and mild in conditions, and is environment-friendly; the prepared heteropolyacid / macrocyclic compound / carbon electrocatalyst is quite high in oxygen reduction activity, and can be applied to the proton exchange membrane fuel cell.

Description

technical field [0001] The invention belongs to the field of proton exchange membrane fuel cell electrocatalysts, and relates to a preparation method and application of a heteropolyacid / macrocyclic compound / carbon electrocatalyst. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) have attracted extensive attention due to their advantages such as high power density, fast start-up, and environmental friendliness. Platinum-based electrocatalyst is one of the core materials of PEMFC, but the large amount of platinum used and the high price limit the wide application of PEMFC. One of the solutions is to develop low-cost, high-efficiency, and high-stability non-precious metal electrocatalysts to replace platinum-based electrocatalysts to promote the commercialization of PEMFCs. [0003] Since Jasinski discovered that cobalt phthalocyanine has oxygen reduction activity in alkaline systems in 1964 (Nature, 1964, 201, 1212-1213), many electrocatalysts for ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90
CPCH01M4/8647H01M4/88H01M4/9008H01M4/9083Y02E60/50
Inventor 宋玉江韩洪仨
Owner DALIAN UNIV OF TECH
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