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Novel bifunctional electrochemical efficient catalyst composite material and preparation method thereof

A composite material, dual-function technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of reducing volume capacity and mass capacity, low energy density, etc. problems, to achieve the effect of improving performance, increasing specific surface area, and good stability

Pending Publication Date: 2020-06-23
HUBEI UNIV +1
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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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  • Novel bifunctional electrochemical efficient catalyst composite material and preparation method thereof
  • Novel bifunctional electrochemical efficient catalyst composite material and preparation method thereof
  • Novel bifunctional electrochemical efficient catalyst composite material and preparation method thereof

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Effect test

preparation example Construction

[0043] The present invention provides a method for preparing an iron-based metal organic frame / nickel foam composite material, which includes the following procedures and steps:

[0044] Process (1): Take commercially available foamed three-dimensional porous nickel foam material, composition: nickel content 99.8%; specification size: 250mm*200mm*1mm; surface density: 320g / m 2 ±20

[0045] Step (2): Preparation of activated three-dimensional porous nickel foam material carrier:

[0046] Activating solution formula: HCL, concentration 1~10mol / L

[0047] Activation process: temperature 25~60℃, time 1~45min.

[0048] According to the above formula and process, the three-dimensional porous nickel foam material is activated 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.

[0049] Process (3): Preparation of iron-based metal organic frame / nic...

Embodiment 1

[0059] In the above specific embodiment,

[0060] Step (1): Prepare the foam three-dimensional porous nickel foam material according to the above "specific implementation method"

[0061] Step (2): Preparation of activated three-dimensional porous nickel foam material carrier:

[0062] HCL, concentration 1mol / L, temperature 60℃, time 45min.

[0063] Process (3): Preparation of iron-based metal organic frame / nickel foam composite material:

[0064] Step 1: Ferrous chloride tetrahydrate: 60mg, 2,5-dihydroxyterephthalic acid: 100mg; DMF: 20Ml, deionized water: 1.5ml, absolute ethanol: 1.5ml

[0065] Step 2: Prepare the autoclave according to the above "specific implementation method".

[0066] Step 3: Prepare MOF material according to the above "specific implementation method":

[0067] Electrochemical test results:

[0068] Use the prepared MOF material as the working electrode of HER linear cyclic voltammetry test, reaching 300mA / cm 2 The current density. This reflects the excellent hydroge...

Embodiment 2

[0071] In the above specific embodiment,

[0072] Step (1): Prepare the foam three-dimensional porous nickel foam material according to the above "specific implementation method"

[0073] Step (2): Preparation of activated three-dimensional porous nickel foam material carrier:

[0074] HCL, concentration 3mol / L, temperature 60℃, time 30min.

[0075] Process (3): Preparation of iron-based metal organic frame / nickel foam composite material:

[0076] Step 1: Ferrous chloride tetrahydrate: 136.7mg, 2,5-dihydroxyterephthalic acid: 60mg; DMF: 20ml, deionized water: 1.5ml, absolute ethanol: 1.5ml

[0077] Step 2: Prepare the autoclave according to the above "specific implementation method".

[0078] Step 3: Prepare MOF material according to the above "specific implementation method":

[0079] Using the prepared MOF material as the working electrode of HER linear cyclic voltammetry test, 320mA / cm is achieved 2 The current density. This reflects the excellent hydrogen evolution performance of this...

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Abstract

The invention belongs to the technical field of new energy materials, and particularly relates to a novel bifunctional electrochemical efficient catalyst, in particular to a metal organic framework (MOF) array constructed by introducing ferrous ions and a preparation method thereof. The preparation method comprises the following steps: (1) putting nickel foam (NF) into a hydrochloric acid solutionto remove impurities such as nickel oxide on the surface, improving the adhesive force of reactants on the surface of nickel foam, taking out, washing, and drying water on the surface to obtain an activated nickel foam carrier; and (2) weighing iron salt according to a certain molar weight, taking a certain amount of ligand, dissolving iron salt and the ligand in a solvent, immersing the nickel foam carrier obtained in the step (1) into the solution, and carrying out a solvothermal reaction to obtain the iron-based metal organic framework composite material with a columnar structure. The prepared novel bifunctional electrochemical catalyst has a large current effect and super-stability under a high current density, and thus the novel bifunctional electrochemical catalyst has a more excellent electrochemical catalytic performance and higher stability.

Description

Technical field [0001] The invention belongs to the technical field of new energy materials, and specifically relates to a novel dual-function 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 were synthesized, but their porosity and chemical stability were not high. Therefore, scientists began to study new types of coordination polymers formed by cations, anions 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 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 high porosity, large specific surface area, regular periodic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J35/10C08G83/00C25B11/06C25B1/04
CPCB01J31/1691B01J31/2208C08G83/008C25B11/04C25B1/04B01J2531/0213B01J2531/16B01J35/33B01J35/61Y02E60/36
Inventor 王海人魏飞飞王麒钧李金华屈钧娥
Owner HUBEI UNIV
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