Preparation method and application of functionalized group-adjustable carbon nanotube loaded iron phthalocyanine composite material

A technology of carbon nanotubes and composite materials, applied in the field of electrochemistry, can solve the problems of single-atom catalysts such as low plasticity, poor environmental adaptability, and introduction of functional groups, and achieve the effects of excellent electrocatalytic oxygen reduction performance, low cost, and mild conditions

Inactive Publication Date: 2021-02-12
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of cations or extensive hydrogen bonding in materials or solutions is a stable O 2- The most common and simplest method is to introduce functional groups that can form hydrogen bonds, but due to the low plasticity of single-atom catalysts, functional groups cannot be easily introduced into materials.
Some recent ones have M-N 4 Small molecule catalysts with porphyrin-like structures have become a research hotspot, among which metallophthalocyanines have a two-dimensional planar structure and M-N 4 The structure of small molecules has been widely studied. This small molecule has a large π bond that can form a π-π attraction with the graphene-like structure and anchor on the surface of the graphene-like structure. At the same time, this material has good class modification. Usually the easiest way is to modify the graphene substrate first, and then introduce the metal phthalocyanine structure; but because the metal phthalocyanine itself is easy to agglomerate, has poor stability, is easy to deactivate for a long time, and has poor adaptability to the environment, there are many limitations in application.

Method used

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  • Preparation method and application of functionalized group-adjustable carbon nanotube loaded iron phthalocyanine composite material
  • Preparation method and application of functionalized group-adjustable carbon nanotube loaded iron phthalocyanine composite material
  • Preparation method and application of functionalized group-adjustable carbon nanotube loaded iron phthalocyanine composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Iron Phthalocyanine FePc / MNCNT-NH Supported by Aminated Multi-walled Carbon Nanotubes 2 Preparation of:

[0037] (1) Dissolve 0.5 g of iron phthalocyanine in 50 mL of ethanol, and ultrasonicate for 1 h at room temperature to obtain a uniform dark green liquid, which is designated as mixture I.

[0038] (2) Take 2.5g of aminated carbon nanotube MNCNT-NH 2 Add it into 50ml of ethanol, and ultrasonicate at room temperature for 1h to obtain a uniformly dispersed black dispersion, which is designated as Mixture II.

[0039] (3) Add the above-mentioned mixture I to the mixture II, after mixing, sonicate for 1h, then magnetically stir at room temperature for 24h under the protection of nitrogen, and after standing for 1h, a black suspension is obtained. Suction filter the suspension, and use it several times. Washed with ethanol, and finally dried in a vacuum dryer at 60°C for 12 hours to obtain a black powder product aminated multi-walled carbon nanotubes loaded with iron p...

Embodiment 2

[0045] Preparation of hydroxylated multi-walled carbon nanotubes supported iron phthalocyanine FePc / MNCNT-OH:

[0046] (1) Dissolve 0.1 g of iron phthalocyanine in 50 mL of DMF, and ultrasonicate for 0.5 h at room temperature to obtain a uniform dark green liquid, which is designated as Mixture I.

[0047] (2) Add 1 g of hydroxylated carbon nanotubes MNCNT-OH to 50 ml of DMF, and ultrasonicate for 0.5 h at room temperature to obtain a uniformly dispersed black dispersion liquid, which is designated as mixture II.

[0048] (3) Add the above-mentioned mixture I to the mixture II, and after mixing, sonicate for 1 hour, then magnetically stir at room temperature for 12 hours under the protection of nitrogen, and after standing for 1 hour, a black suspension is obtained. Washed with ethanol and DMF, and finally dried in a vacuum dryer at 60°C for 12 hours to obtain a black powder product of hydroxylated multi-walled carbon nanotubes loaded with iron phthalocyanine FePc / MNCNT-OH.

Embodiment 3

[0050] Preparation of iron phthalocyanine FePc / MNCNT-COOH supported by carboxylated multi-walled carbon nanotubes:

[0051] (1) Dissolve 0.05 g of iron phthalocyanine in 50 mL of dimethyl sulfoxide, and sonicate for 1 h at room temperature to obtain a uniform dark green liquid, which is designated as mixture I.

[0052] (2) Add 0.4 g of carboxylated carbon nanotube MNCNT-COOH into 50 ml of dimethyl sulfoxide, and ultrasonicate for 1 h at room temperature to obtain a uniformly dispersed black dispersion liquid, which is designated as mixture II.

[0053] (3) Add the above-mentioned mixture I to the mixture II, after mixing, sonicate for 0.5h, then magnetically stir at room temperature for 20h under the protection of nitrogen, and after standing for 1h, a black suspension is obtained, and the suspension is suction-filtered for several times Wash with ethanol and dimethyl sulfoxide, and finally dry in a vacuum dryer at 60°C for 12 hours to obtain a black powder product carboxylat...

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Abstract

The invention relates to a preparation method and application of a functionalized group-adjustable carbon nanotube loaded iron phthalocyanine composite material. The method comprises the steps of mixing an iron phthalocyanine solution and a functionalized multi-walled carbon nanotube MNCNT-R solution, ultrasonically dispersing a dispersion liquid for 10-60 minutes, and finally magnetically stirring the dispersion liquid for 10-24 hours at room temperature under the protection of nitrogen to obtain the black solid product, namely, the functionalized carbon nanotube loaded iron phthalocyanine composite material. The composite electrocatalytic material with excellent oxygen reduction performance is obtained, and preparation of a carbon-based oxygen reduction catalytic material with high-quality and high-current density can be efficiently catalyzed.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to an electrocatalyst and its preparation method and its application in electrocatalytic oxygen reduction. Background technique [0002] Global environmental concerns caused by the increased use of fossil fuels have stimulated worldwide research into sustainable energy technologies. The development of sustainable energy technologies, including metal-air batteries and fuel cells, relies heavily on electrocatalysts for the oxygen reduction reaction (ORR), as they are at the heart of this energy source. Noble metal catalytic materials (such as Pt) have been extensively researched and developed due to their excellent ORR activity, but cannot be applied globally on a large scale due to their high price, low reserves, and low stability. Therefore, it is urgent to develop low-cost, high-activity, and high-stability ORR catalysts to replace traditional noble metal catalytic materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9008H01M4/9083H01M2004/8689Y02E60/50
Inventor 张文林杨双丞于丰收张永康王磊杨德新李春利
Owner HEBEI UNIV OF TECH
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