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A kind of cobalt-nitrogen co-doped carbon airgel catalyst for fuel cell and preparation method thereof

A carbon aerogel and fuel cell technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as difficult breakthroughs in stability, balance of activity, and increase in mass transfer resistance, and achieve excellent electrocatalytic activity and stability, The effect of reducing the preparation cost and uniformly dispersing the catalyst

Active Publication Date: 2021-04-23
武汉氢能与燃料电池产业技术研究院有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this type of catalyst still has two fatal shortcomings: It is difficult to break through the stability and take into account the activity (identification of the active site); There are scientific and technical problems that need to be solved urgently when applied to the cathode catalytic layer (thicker catalytic layer leads to the problem of increased mass transfer resistance)

Method used

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  • A kind of cobalt-nitrogen co-doped carbon airgel catalyst for fuel cell and preparation method thereof
  • A kind of cobalt-nitrogen co-doped carbon airgel catalyst for fuel cell and preparation method thereof
  • A kind of cobalt-nitrogen co-doped carbon airgel catalyst for fuel cell and preparation method thereof

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preparation example Construction

[0032] The preparation method of the non-precious metal catalyst for the fuel cell of the present invention comprises two major steps. First, the hydrothermal reaction method is used to synthesize Co-phen by controlling the pH, reaction temperature and time of the reaction, and then the carbon airgel is synthesized by the sol-gel method; Then Co-phen was coated with carbon aerogel, and the composite material obtained in the previous step was 2 Preparation of cobalt-nitrogen co-doped carbon airgel catalyst by calcination at high temperature. Specific steps are as follows:

[0033] (1) Preparation of metal-organic framework complexes (Co-phen).

[0034] Such as Figure 6 shown. A: Pyridine 2,6-dicarboxylic acid dissolved in 20ml of methanol, B: Co(NO 3 ).6H 2 O and o-phenanthroline were dissolved in a mixed solution of 15ml of methanol and 20ml of deionized water, and the completely dissolved A was added to the completely dissolved B solution, stirred at room temperature fo...

Embodiment 1

[0044] (1) Weigh Co-phen and carbon airgel with a ratio of 1:10 into a 100ml beaker, add 20-40ml of ethylene glycol, and stir it ultrasonically to dissolve it completely;

[0045] (2) Add 0.5-5mol / L NaOH solution to adjust the pH to 7-10, stir at room temperature for 12-24h, and dry by suction;

[0046] (3) Put the composite material obtained in (2) in a porcelain boat, and put it in N 2 Under the atmosphere, use a tube furnace to treat it at a high temperature of 600-800° C. for 2-5 hours to obtain a non-precious metal catalyst.

Embodiment 2

[0048] (1) Weigh Co-phen and carbon airgel with a ratio of 2:10 into a 100ml beaker, add 20-40ml of ethylene glycol, and stir ultrasonically to completely dissolve it;

[0049] (2) Add 0.5-5mol / L NaOH solution to adjust the pH to 7-10, stir at room temperature for 12-24h, and dry by suction;

[0050] (3) Put the composite material obtained in (2) in a porcelain boat, and put it in N 2 Under the atmosphere, use a tube furnace to treat it at a high temperature of 600-800° C. for 2-5 hours to obtain a non-precious metal catalyst.

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Abstract

The invention discloses a cobalt-nitrogen co-doped carbon airgel catalyst for fuel cells and a preparation method thereof. The core-shell structure and material composition are Co-phen@CA; wherein, the carrier is carbon gas condensed after high-temperature carbonization The active component is cobalt simple substance and its oxides and carbides uniformly distributed on the surface of the carbon airgel; the present invention uses cobalt nitrate hexahydrate and organic ligands o-phenanthroline and pyridine 2,6-dicarboxylic acid in A new class of metal-organic framework complex materials with a sheet-like structure was generated by the reaction in a hydrothermal environment, and a new class of composite materials was formed after coating it with carbon aerogels, and the calcination process used N 2 As a protective gas, the preparation cost is obviously reduced, which will promote the further development of non-precious metal catalysts.

Description

technical field [0001] The invention belongs to the technical field of non-precious metal catalysts for fuel cells, in particular to a cobalt-nitrogen co-doped carbon airgel catalyst (Co- phen@CA). Background technique [0002] As a power generation device that directly converts the chemical energy of fuel into electrical energy through electrochemical reactions, fuel cells are a clean energy device with broad application prospects in the 21st century. Its appearance is expected to replace the current stage Conventional energy and rechargeable lithium-ion batteries. As an alkaline fuel cell that can operate smoothly at low temperature, its development is getting more and more attention. [0003] At present, low-temperature fuel cell cathode catalysts rely entirely on platinum (Pt) to meet power requirements, and the cost and reserves of Pt limit its commercialization. Therefore, the development of low-cost, high-active density centers, and high-stability non-noble metal c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90
CPCH01M4/8647H01M4/9016H01M4/9041H01M4/9083Y02E60/50
Inventor 李柯余罡花仕洋吴昊詹东旭
Owner 武汉氢能与燃料电池产业技术研究院有限公司