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Nitrogen-doped carbon nanotube-loaded nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst and preparation method and application thereof

A bifunctional catalyst, nitrogen-doped carbon technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as poor stability and self-aggregation, achieve good discharge performance, improve resistance Effects of CO poisoning and enrichment of active sites

Inactive Publication Date: 2020-02-11
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its alloyed metal nanoparticles suffer from poor stability and obvious self-aggregation when subjected to ORR and OER processes (especially in harsh electrochemical environments).

Method used

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  • Nitrogen-doped carbon nanotube-loaded nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst and preparation method and application thereof
  • Nitrogen-doped carbon nanotube-loaded nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst and preparation method and application thereof
  • Nitrogen-doped carbon nanotube-loaded nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst supported by nitrogen-doped carbon nanotubes (Fe 1.2 Co@NC / NCNTs) synthesis:

[0034] (1) Pretreatment of carbon nanotubes:

[0035] Dissolve 100 mg of carbon nanotubes (CNTs) in 10 mL of acetone, stir at room temperature for 3 h, wash and dry; add the dried CNTs into the flask, and then add 100 mL of 10% HNO with a volume ratio of 2:1 3 and 10%H 2 o 2 Mixed solution, start stirring, heat up to 60°C, reflux and stir for 5h, suction filter after cooling, wash the filter cake with deionized water until neutral, dry in a vacuum oven at 50°C to constant weight, and dry the functional The NaCNTs samples were ground for later use.

[0036] (2) Grafting reaction of iron-cobalt organic ligands and melamine on the surface of functionalized carbon nanotubes:

[0037] Under the condition of stirring, 50 mg of FePc (ferric phthalocyanine) and 50 mg of CoPc (cobalt phthalocyanine) were ultrasonicall...

Embodiment 2

[0064] Example 2: Nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst supported by nitrogen-doped carbon nanotubes (Fe 2.8 Co@NC / NCNTs) synthesis:

[0065] (1) Pretreatment of carbon nanotubes:

[0066] Dissolve 200 mg of carbon nanotubes (CNTs) in 10 mL of acetone, stir at room temperature for 5 h, wash and dry; add the dried CNTs into the flask, and then add 100 mL of 10% HNO with a volume ratio of 3:1 3 and 35%H 2 o 2 Mixed liquid, start stirring, heat up to 80°C, reflux and stir for 5h, suction filter after cooling, wash the filter cake with deionized water until neutral, dry in a vacuum oven at 80°C to constant weight, and dry the functional The NaCNTs samples were ground for later use.

[0067] (2) Grafting reaction of iron-cobalt organic ligands and melamine on the surface of functionalized carbon nanotubes:

[0068] Under the condition of stirring, 100 mg of FePc (ferric phthalocyanide) and 30 mg of CoPc (cobalt phthalocyanine) materials were ultr...

Embodiment 3

[0073] Example 3: Nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst supported by nitrogen-doped carbon nanotubes (FeCo 2.5 @NC / NCNTs) synthesis:

[0074] (1) Pretreatment of carbon nanotubes:

[0075] Dissolve 50 mg of carbon nanotubes (CNTs) in 5 mL of acetone, stir at room temperature for 3 h, wash and dry; add the dried CNTs into the flask, and then add 50 mL of 5% HNO with a volume ratio of 2:1 3 and 10%H 2 o 2 Mixed solution, start stirring, heat up to 60°C, reflux and stir for 3h, suction filter after cooling, wash the filter cake with deionized water until neutral, dry in a vacuum oven at 50°C to constant weight, and dry the functional The NaCNTs samples were ground for later use.

[0076] (2) Grafting reaction of iron-cobalt organic ligands and melamine on the surface of functionalized carbon nanotubes:

[0077] Under the condition of stirring, 30mg of FePc (ferric phthalocyanine) and 100mg of CoPc (cobalt phthalocyanine) materials were ultrason...

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Abstract

The invention discloses a nitrogen-doped carbon nanotube-loaded nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst and a preparation method and an application thereof. The catalyst is characterized in that for a structural unit, nitrogen-doped carbon nanotubes (NCNTs) are utilized as a conductive network, and iron-cobalt alloy nanoparticles wrapped by a nitrogen-doped ultrathin carbon layer are loaded on the nitrogen-doped ultrathin carbon layer. The preparation method comprises steps of pretreatment of carbon nanotubes, removing impurities on surfaces of the carbon nanotubesthrough cleaning, and generating a large number of defects and oxygen-containing surface functional groups on the surfaces of the carbon nanotubes through acid treatment; carrying out grafting reaction of an iron-cobalt organic ligand and melamine on the surfaces of the functionalized carbon nanotubes; calcining the iron-cobalt organic ligand and the melamine-grafted functionalized carbon nanotubes under a high-temperature condition to obtain the nitrogen-doped carbon nanotube-loaded nitrogen-doped carbon-coated iron-cobalt alloy bifunctional catalyst.

Description

technical field [0001] The invention belongs to the technical field of preparation of new energy materials—electrode materials for zinc-air batteries. More specifically, the invention relates to a high-efficiency and stable dual-function catalyst for air electrodes of zinc-air batteries and its preparation method and application. Background technique [0002] With the development of social economy and technology, people's lives are becoming more and more intelligent. Many wearable devices are used to facilitate people's lives and protect people's health, such as sports bracelets and medical technology. Carrier wearable devices are playing an important role in measuring physical conditions, recording physiological parameters or notifying when to take medication. Many battery products have also entered people's lives widely with the appearance of these devices. However, most of these batteries are harmful to the environment and are very inefficient in practical applications. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/08B82Y30/00
CPCB82Y30/00H01M4/9041H01M4/9083H01M12/08Y02E60/10
Inventor 蒋仲庆李莎莎韩佳奇白云飞尚小楠陈巍衡王若飞费翼凡
Owner ZHEJIANG SCI-TECH UNIV
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