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Preparation of amorphous surface modified layered double hydroxide hierarchical heterostructure electrocatalyst

A surface modification layer, double hydroxide technology, applied in electrodes, electrolysis process, electrolysis components and other directions, can solve problems such as high technical requirements, industrial application impact, complex methods and processes, achieve low technical requirements, and easy to promote , the effect of simple preparation process

Active Publication Date: 2021-05-14
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commonly used two-dimensional materials such as graphene to construct a superlattice structure can improve catalytic activity, but the method is complex and technically demanding, and cannot be realized on a conductive substrate, so it has a certain impact on its industrial application

Method used

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  • Preparation of amorphous surface modified layered double hydroxide hierarchical heterostructure electrocatalyst
  • Preparation of amorphous surface modified layered double hydroxide hierarchical heterostructure electrocatalyst
  • Preparation of amorphous surface modified layered double hydroxide hierarchical heterostructure electrocatalyst

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Effect test

Embodiment 1

[0023] A preparation of an amorphous surface-modified layered double hydroxide hierarchical heterostructure electrocatalyst, specifically comprising the following steps:

[0024] (1) 0.8mmol of CoCl 2 ·6H 2 O, 0.4mmol of AlCl 3 ·6H 2 The ammonium fluoride of 0.4mmol and the urea of ​​28mmol are dissolved in the deionized water of 40ml, after magnetic stirring 30min, obtain mixed solution;

[0025] (2) mixed solution is moved into the high-pressure hydrothermal reaction kettle that volume is 50ml, then adds foamed nickel in the still, the size of foamed nickel is 2cm * 3cm, foamed nickel is before putting into autoclave, with deionized water and Ultrasonic cleaning with ethanol for 5 minutes, then seal the autoclave and put it in an oven, react at 100°C for 3 hours, take out the foamed nickel after cooling to room temperature naturally, and wash the foamed nickel with deionized water and absolute ethanol three times respectively Then put it into a vacuum drying oven and kee...

Embodiment 2

[0028] A preparation of an amorphous surface-modified layered double hydroxide hierarchical heterostructure electrocatalyst, specifically comprising the following steps:

[0029] (1) 0.8mmol of CoCl 2 ·6H 2 O, 0.4mmol of AlCl 3 ·6H 2 The ammonium fluoride of 0.4mmol and the urea of ​​28mmol are dissolved in the deionized water of 40ml, after magnetic stirring 30min, obtain mixed solution;

[0030] (2) mixed solution is moved into the high-pressure hydrothermal reaction kettle that volume is 50ml, then adds foamed nickel in the still, the size of foamed nickel is 2cm * 3cm, foamed nickel is before putting into autoclave, with deionized water and Ultrasonic cleaning with ethanol for 5 minutes, then seal the autoclave and put it in an oven, react at 100°C for 3 hours, take out the foamed nickel after cooling to room temperature naturally, and wash the foamed nickel with deionized water and absolute ethanol three times respectively Then put it into a vacuum drying oven and kee...

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Abstract

The invention discloses a preparation method of an amorphous surface modified layered double hydroxide hierarchical heterostructure electrocatalyst in the technical field of material preparation, which comprises the following steps: (1) dissolving CoCl2.6H2O, AlCl3.6H2O, ammonium fluoride and urea in deionized water to obtain a mixed solution; (2) transferring the mixed solution into a high-pressure hydrothermal reaction kettle, and then adding foamed nickel into the kettle; and (3) stirring FeCl3.6H2O and absolute ethyl alcohol for 10 minutes to form a solution, putting the foamed nickel obtained in the step (2) into the solution, magnetically stirring for 12 hours, then taking out, cleaning with absolute ethyl alcohol for three times, putting into a vacuum drying oven, and preserving heat at 60 DEG C for one night to obtain a target product. Compared with a traditional noble metal oxide, the product has the advantages that the catalytic performance is guaranteed, and meanwhile, the product is wide in raw material source, low in price and easy to popularize; the preparation technology is simple, the technical requirement is not high, and industrial large-scale application is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to the preparation of an amorphous surface-modified layered double hydroxide hierarchical heterostructure electrocatalyst. Background technique [0002] The energy problem has become one of the main problems facing the sustainable development of the world today, and the development and utilization of hydrogen production by electrolysis of water has become one of the key technical means to solve this problem. However, the sluggish kinetic process of the oxygen evolution reaction (OER) in electrocatalytic water electrolysis inhibits the efficiency of electrocatalysts. At the same time, there is an urgent need to replace traditional noble metal oxides with cheap and abundant OER catalytic materials. Transition metal layered double hydroxides are widely regarded as one of the most promising electrocatalyst candidates due to their unique structure-induced physicochemical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/075
CPCC25B1/04Y02E60/36
Inventor 邓小龙刘义李海金
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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