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Composite material of nanoscale cobalt based particles and nitrogen doped carbon, synthetic method and application

A composite material, nitrogen-doped carbon technology, applied in chemical instruments and methods, electrical components, circuits, etc., can solve the problems of restricting large-scale production, poor durability, scarce output, etc., and achieve commercial large-scale production , simple operation and low cost of raw materials

Active Publication Date: 2016-08-17
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, platinum-based noble metals have been considered as the best oxygen reduction catalysts, but these noble metals have limited their large-scale production due to high cost, scarce yield and poor durability.

Method used

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  • Composite material of nanoscale cobalt based particles and nitrogen doped carbon, synthetic method and application
  • Composite material of nanoscale cobalt based particles and nitrogen doped carbon, synthetic method and application
  • Composite material of nanoscale cobalt based particles and nitrogen doped carbon, synthetic method and application

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Embodiment 1

[0050] In the invention, a certain amount of ethylenediaminetetraacetic acid is added to raw materials to synthesize a composite of nano-scale cobalt-based particles / nitrogen-doped carbon, and the oxygen reduction performance is evaluated.

[0051] 30g of melamine and 1g of glucosamine hydrochloride were uniformly mixed in an aqueous solution to form solution A. In addition, 1 g of ethylenediamine tetraacetic acid was dissolved in the aqueous solution, and 1 g of cobalt nitrate was added thereto, and mixed uniformly to form solution B. Mix solution A and solution B evenly, heat and stir until dry. The obtained solid mixture was calcined at 800° C. for 2 h under a nitrogen atmosphere to finally obtain a composite of nano-sized cobalt-based particles and nitrogen-doped carbon. The mass content of cobalt-based particles in the composite reaches 58%, and the content of pyridine nitrogen in the product is 57% (the percentage of pyridine nitrogen in the total nitrogen), and a dense...

Embodiment 2

[0054] In the invention, a certain amount of ethylenediaminetetraacetic acid is added to raw materials to synthesize a composite of nano-scale cobalt-based particles / nitrogen-doped carbon, and the oxygen reduction performance is evaluated.

[0055] 40g of melamine and 1g of glucosamine hydrochloride were uniformly mixed in an aqueous solution to form solution A. In addition, 4 g of ethylenediaminetetraacetic acid was dissolved in the aqueous solution, and 2 g of cobalt acetate was added thereto, and mixed uniformly to form solution B. Mix solution A and solution B evenly, heat and stir until dry. The obtained solid mixture was calcined at 700° C. for 3 h under an argon atmosphere to finally obtain a composite of nano-sized cobalt-based particles and nitrogen-doped carbon. The mass content of cobalt-based particles in the composite reaches 47%, and the mass content of pyridine nitrogen in the product is 55% (the percentage of pyridine nitrogen in the total nitrogen), and a den...

Embodiment 3

[0058] In the invention, a certain amount of ethylenediaminetetraacetic acid is added to raw materials to synthesize a composite of nano-scale cobalt-based particles / nitrogen-doped carbon, and the oxygen reduction performance is evaluated.

[0059] 20g of melamine and 1g of glucosamine hydrochloride were uniformly mixed in an aqueous solution to form solution A. In addition, 0.25 g of ethylenediamine tetraacetic acid was dissolved in the aqueous solution, and 0.5 g of cobalt chloride was added thereto, and mixed uniformly to form solution B. Mix solution A and solution B evenly, heat and stir until dry. The obtained solid mixture was calcined at 600° C. for 5 h under a helium atmosphere, and finally a composite of nano-scale cobalt-based particles and nitrogen-doped carbon was obtained. The mass content of cobalt-based particles in the composite reaches 51%, and the mass content of pyridine nitrogen in the product is 51% (the percentage of pyridine nitrogen in the total nitro...

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Abstract

The invention provides a composite material of nanoscale cobalt based particles and nitrogen doped carbon, a synthetic method and application. The composite material is characterized by being a coated type composite with the cobalt based particles as a core and the nitrogen doped carbon as a shell, wherein the mass content of the cobalt based particles reaches 40% to 60%; the mass content of pyridine nitrogen in the composite material is 50% to 60%; and the thickness of a carbon shell protection layer is 2 to 4 nm. The material provided by the invention has high oxygen reduction reaction (ORR) ability, is related to energy storage cells, and can be used as a cathode electrocatalyst of proton exchange membrane fuel cells and rechargeable metal-air cells.

Description

technical field [0001] The invention relates to a composite material, synthesis method and application of nano-scale cobalt-based particles and nitrogen-doped carbon. The material has high oxygen reduction (ORR) capability, is related to energy storage batteries, and can be used as proton exchange membrane fuel cells, Cathodic electrocatalysts for rechargeable metal-air batteries. Background technique [0002] Energy and the environment are the reliance and guarantee for the sustained and rapid development of economy and civilization in modern human society. With the development of industrial economy and the improvement of human living standards, human demand for energy is also changing and increasing. As we all know, the current energy It mainly comes from non-renewable fossil energy, and while people are seeking rapid economic development, the excessive and irrational use of this kind of energy has caused a sharp decline in the amount of these energy sources, and the waste...

Claims

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Application Information

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IPC IPC(8): B01J27/24H01M4/90
CPCH01M4/9016H01M4/9083B01J27/24B01J35/33Y02E60/50
Inventor 周嵬喻洁邵宗平
Owner NANJING UNIV OF TECH
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