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A kind of preparation method of iron-cobalt alloy/nitrogen co-doped carbon aerogel electrocatalytic material

An electrocatalytic material, iron-cobalt alloy technology, applied in the direction of fuel cell-type half-cell and secondary battery-type half-cell, circuits, electrical components, etc. Utilize and other problems to achieve excellent catalytic performance, improve catalytic performance, and increase the effect of basic sites

Active Publication Date: 2022-07-26
南京绿源智慧科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the development of biomass energy technology and the development of the market are not perfect enough, resulting in the waste of a lot of resources and the pollution of certain environments.
It is estimated that the world produces about 10 to 15 billion tons of biomass waste every year, but most of them have not been effectively reused, especially marine debris, such as some seaweed, not only not being used, but also increasing marine pollution

Method used

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  • A kind of preparation method of iron-cobalt alloy/nitrogen co-doped carbon aerogel electrocatalytic material
  • A kind of preparation method of iron-cobalt alloy/nitrogen co-doped carbon aerogel electrocatalytic material
  • A kind of preparation method of iron-cobalt alloy/nitrogen co-doped carbon aerogel electrocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Select sodium alginate as the precursor, polypyrrole and melamine as nitrogen sources, cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) is cobalt salt, ferric chloride hexahydrate (FeCl 3 ·6H 2 O) is an iron salt to prepare an iron-cobalt alloy / nitrogen co-doped carbon aerogel electrode material based on sodium alginate:

[0036] First, weigh 1 g of sodium alginate (SA) and 0.1 g of polypyrrole (PPy) into beaker A and add 50 mL of deionized water to dissolve to form the first solution. Weigh 1.25 g CoCl 2 ·6H 2 O, 1.25 g FeCl 3 ·6H 2 O is placed in beaker B and 50 mL of water is added to dissolve it ultrasonically to form a second solution, in which Fe 3+ and Co 2+The molar ratio is about 1:1. Then, the mixed solution in beaker A was dropped into B with a syringe, placed at room temperature (20°C) for 1 h, washed with deionized water, and freeze-dried to obtain a yellow-green aerogel. The freeze-dried product was calcined at 256 °C for 1 h at a heating rate of 2 °...

Embodiment 2

[0042] Example 2 (comparative example)

[0043] The difference from Example 1 is that the material is not impregnated with nitrogen and carbonized again after freeze-drying, high-temperature calcination and pickling, and the resulting material is an iron-cobalt alloy-doped carbon aerogel based on sodium alginate. Labeled as FeCo-SACA-PPy.

Embodiment 3

[0044] Example 3 (comparative example)

[0045] The difference from Example 1 is that no polypyrrole was added when the material was prepared in the first solution, and there was no process of impregnation and nitrogen-doping and recarbonization afterward. The prepared material was marked as FeCo-SACA.

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Abstract

A preparation method of an iron-cobalt alloy / nitrogen co-doped carbon aerogel electrode material relates to the field of catalyst preparation. The method includes dispersing sodium alginate and polypyrrole in water to form a first solution, dispersing iron salt and cobalt salt in water to form a second solution; dropping the first solution into the second solution and letting it stand for 1 hour to obtain a hydrogel; Freeze-drying, calcining at high temperature in nitrogen for 1 h, and pickling the sample to obtain carbon aerogel; impregnating the solid powder with melamine, drying it again in N 2 Medium calcination to obtain iron-cobalt alloy / nitrogen co-doped electrode material based on sodium alginate. The invention has the dual function catalytic performance of oxygen reduction (ORR) and oxygen evolution (OER), and the assembled zinc-air battery has high power density and good charge-discharge performance. The invention not only makes the cheap biomass seaweed resourceful, but also has a non-toxic and harmless preparation process, low cost, and broad industrial application prospect.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a preparation method of an iron-cobalt alloy / nitrogen co-doped carbon aerogel electrocatalytic material, belonging to the technical field of electrocatalysis. Background technique [0002] With the rapid development of modern industry and society, energy and environmental issues follow. Today's ever-increasing performance of electric vehicles and mobile devices creates a strong need for new electrochemical energy storage and conversion devices. So far, rechargeable zinc-air batteries, fuel cells, etc. have received extensive attention due to their high safety, abundant resources and environmental protection. However, oxygen-reduction electrocatalysts used in catalysis fields such as fuel cells, microbial batteries, and metal-air batteries do not possess fast kinetics and suffer from poor stability and methanol resistance, and their commercial development and application are s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/08
CPCH01M4/8825H01M4/9083H01M4/9041H01M12/08H01M2004/8689
Inventor 黄燕李思媛
Owner 南京绿源智慧科技有限公司
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