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Preparation method and application of biomimetic oxygen reduction electrocatalyst based on metal macrocyclic compound

A technology of macrocyclic compounds and electrocatalysts, applied in circuits, electrical components, battery electrodes, etc., can solve problems such as low efficiency of covalent bond replacement, complicated experimental methods, and damage to the conductivity of carbon materials, and achieve a large specific surface area, conductive Good performance, improve the effect of electron conduction

Active Publication Date: 2018-05-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the experimental method of fixing covalent bonds on carbon nanotubes is complicated, and the efficiency of covalent bond replacement is low, and the derivation of covalent bonds will make the original SP on carbon nanotubes 2 Hybridized large π bonds become SP 3 Hybridization, which destroys the electrical conductivity of the original carbon material

Method used

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  • Preparation method and application of biomimetic oxygen reduction electrocatalyst based on metal macrocyclic compound
  • Preparation method and application of biomimetic oxygen reduction electrocatalyst based on metal macrocyclic compound
  • Preparation method and application of biomimetic oxygen reduction electrocatalyst based on metal macrocyclic compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Disperse 10mg of multi-walled carbon nanotubes and 40mg of compound A (n=1) in 5ml of N,N-dimethylformamide solution, sonicate at 25°C for 30min, stand at -10°C, and filter with suction after 24h , washed with N,N-dimethylformamide until the filtrate was pure and colorless, dried at 65°C, dispersed the obtained black powder solid in 10ml of methanol solution, added 40mg of hematin, and stirred at 25°C under nitrogen for 24h , filtered methanol and washed until the filtrate was colorless, and dried.

Embodiment 2

[0027] Disperse 50 mg of multi-walled carbon nanotubes and 30 mg of compound B (n=2) in 5 ml of tetrahydrofuran solution, ultrasonicate at 25°C for 30 min, stand at -10°C for 24 h, and then filter with suction, wash with tetrahydrofuran until the filtrate is pure and colorless, Dry at ℃, disperse the obtained black powder solid in 10ml of methanol solution, add 40mg of cobalt phthalocyanine, stir at 55℃ under nitrogen for 24h, filter methanol and wash until the filtrate is colorless, and dry. The morphology and performance of the obtained catalyst are similar to those of the sample in Example 1, and it has good overall oxygen reduction performance.

Embodiment 3

[0029] Disperse 20mg of graphene and 100mg of compound C (n=4) in 5ml of cyclohexane solution, ultrasonicate at 25°C for 120min, stand still at 20°C for 48h, then filter with suction, wash with cyclohexane until the filtrate is pure and colorless, at 65°C Dry at ℃, disperse the obtained black powder solid in 10ml of cyclohexane solution, add 40mg of tetramethoxyphenyliron porphyrin, stir at 80℃ under nitrogen for 12h, filter and wash with cyclohexane until the filtrate is colorless, drying. The morphology and performance of the obtained catalyst are similar to those of the sample in Example 1, and it has good overall oxygen reduction performance.

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Abstract

The invention discloses a preparation method and application of a biomimetic oxygen reduction electrocatalyst based on a metal macrocyclic compound and belongs to the technical field of proton exchange membrane fuel cell catalysts. According to the preparation method, carbon materials are dispersed in a solvent, an aromatic fused-ring compound is added to the mixture, processed by ultrasound, stirred for 2-48 hours and then subjected to extraction filtration and washing till a filtrate is colorless and clean, and the product is dried to obtain an aromatic fused-ring compound intermediate for carbon adsorption; the obtained aromatic fused-ring compound intermediate for carbon adsorption is dispersed in a solution, blended with the metal macrocyclic compound in the presence of inert gas suchas nitrogen or argon, stirred for 1-48 hours at 25-100 DEG C, then subjected to filtering and washing till a filtrate is colorless, and dried at last, and correspondingly the electrocatalyst based onthe metal macrocyclic compound / the aromatic fused-ring compound / carbon is obtained. The method is easy to operate and control and mild in condition, and the prepared electrocatalyst based on the metal macrocyclic compound / the aromatic fused-ring compound / carbon has high oxygen reduction activity and can be used in a proton exchange membrane fuel cell.

Description

technical field [0001] The invention belongs to the technical field of proton exchange membrane fuel cell electrocatalysts, and relates to a preparation method and application of a metal macrocyclic compound / nitrogen heterocyclic functionalized aromatic fused ring 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] It is well known that biological enzymes have extremely high catalytic activity and selectivity in livin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9008H01M4/9083Y02E60/50
Inventor 宋玉江韩洪仨
Owner DALIAN UNIV OF TECH
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