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A novel dual-mofs electrochemical high-efficiency catalyst composite material and preparation method thereof

An electrocatalytic material and composite material technology, applied in the field of novel dual MOFs electrochemical high-efficiency catalyst composite material and its preparation, can solve the problems of reducing volume capacity and mass capacity, low energy density, etc., to improve performance and increase specific surface area. , the effect of strong stability

Active Publication Date: 2022-07-08
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the intrinsic energy density of this framework material is too low, which limits the theoretical energy density improvement of its redox active sites, thereby reducing its volume capacity and mass capacity.

Method used

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  • A novel dual-mofs electrochemical high-efficiency catalyst composite material and preparation method thereof
  • A novel dual-mofs electrochemical high-efficiency catalyst composite material and preparation method thereof
  • A novel dual-mofs electrochemical high-efficiency catalyst composite material and preparation method thereof

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preparation example Construction

[0058] The invention provides a cobalt-based metal-organic framework / manganese-based metal-organic framework / foamed nickel composite material and a preparation method thereof, including the following procedures and steps:

[0059] Process (1): Take commercially available foam three-dimensional porous nickel foam material, composition: nickel content 99.8%; size: 250mm*200mm*1mm; surface density: 320g / m2±20;

[0060] Process (2): Preparation of activated three-dimensional porous nickel foam material carrier:

[0061] Activation solution formula: HCL, concentration 1~10mol / L

[0062] Activation process: temperature 25~60℃, time 1~45min.

[0063] The three-dimensional porous nickel foam material is activated according to the above formula and process to remove the oxide scale on the surface of the three-dimensional porous nickel foam material, and then taken out and dried to obtain an activated three-dimensional porous nickel foam material carrier.

[0064] Process (3): Prepara...

Embodiment 1

[0084] In the above-mentioned specific embodiment,

[0085] Process (1): Prepare foamed three-dimensional porous nickel foam material according to the above "specific implementation method"

[0086] Process (2): Preparation of activated three-dimensional porous nickel foam material carrier:

[0087] HCL, concentration 1mol / L, temperature 60℃, time 45min.

[0088] Process (3): Preparation of manganese-based metal organic framework / nickel foam composite material:

[0089] Step 1: Manganese chloride tetrahydrate: 60mg, 2,5-dihydroxyterephthalic acid: 60mg; DMF: 20Ml, deionized water: 1.5ml, absolute ethanol: 1.5ml

[0090] Step 2: Prepare the autoclave according to the above-mentioned "specific implementation method".

[0091] Step 3: Prepare MOF material according to the above "specific implementation method":

[0092] Step (4): prepare MOF material according to the above "specific implementation method";

[0093] Electrochemical test results:

[0094] The MOF material pre...

Embodiment 2

[0097] In the above-mentioned specific embodiment,

[0098] Process (1): Prepare foamed three-dimensional porous nickel foam material according to the above "specific implementation method"

[0099] Process (2): Preparation of activated three-dimensional porous nickel foam material carrier:

[0100] HCL, concentration 3mol / L, temperature 60℃, time 30min.

[0101] Process (3): Preparation of manganese-based metal organic framework / nickel foam composite material:

[0102] Step 1: Manganese chloride tetrahydrate: 120mg, 2,5-dihydroxyterephthalic acid: 60mg; DMF: 20ml, deionized water: 1.5ml, absolute ethanol: 1.5ml

[0103] Step 2: Prepare the autoclave according to the above-mentioned "specific implementation method".

[0104] Step 3: Prepare MOF material according to the above "specific implementation method":

[0105] Step (4): Prepare MOF material according to the above "specific implementation method"

[0106]The MOF prepared above was used as the working electrode of t...

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Abstract

The invention relates to a novel double MOFs electrochemical high-efficiency catalyst material and a preparation method thereof. The method includes the following steps: (1) putting nickel foam into a hydrochloric acid solution to remove the surface oxide layer, (2) weighing a certain amount of manganese salt and ligand, dissolving in a solvent, and adding the foam obtained in (1) The nickel carrier is immersed in the solution, and the manganese-based metal-organic framework / foamed nickel composite material with a columnar structure is obtained by solvothermal reaction; (3) Weigh a certain amount of cobalt salt and ligand, dissolve in the solvent, and obtain the obtained in (2) The manganese-based metal-organic framework / nickel foam composite was immersed in the above ligand solution and magnetically stirred for 24 hours to obtain a new bifunctional electrochemical catalyst of cobalt-based metal-organic framework / manganese-based metal-organic framework / nickel foam. The above catalyst is at 10mA / cm 2 , the HER startup overpotential is ‑1.07V, and the OER startup overpotential is 0.59V, which has a "large current" effect, and still has good stability after 24 hours at high current density.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a novel dual-MOFs electrochemical high-efficiency catalyst composite material and a preparation method thereof. Background technique [0002] As early as the mid-1990s, the first type of MOFs with zinc as the cation center were synthesized, but their porosity and chemical stability were not high. Therefore, scientists began to study the coordination polymer MOF materials formed by new cationic, anionic and neutral ligands. At present, a large number of metal-organic framework materials have been synthesized, mainly based on carboxyl-containing organic anion ligands, or MOF materials used together with nitrogen-containing heterocyclic organic neutral ligands. Most of these metal-organic frameworks have high porosity and good chemical stability. In recent years, metal-organic framework (MOF) and its derivative nanomaterials have the characteristics of hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J23/755B01J35/04B01J37/06C25B11/061C25B11/085C25B1/04
CPCB01J31/1691B01J31/2239B01J31/1625B01J37/06C25B1/04B01J2531/72B01J2531/845B01J35/33B01J35/56Y02E60/36
Inventor 王麒钧吴松王海人
Owner HUBEI UNIV
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