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Integral electrode with hierarchical pore structure and preparation method and application of integral electrode

A monolithic, multi-level pore technology, applied in the direction of electrodes, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of limited mass transfer and diffusion capacity of microporous materials, insufficient active sites of macroporous materials, etc. Abundance, low production costs, wide-ranging effects

Pending Publication Date: 2022-01-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the porous structures currently constructed are single-stage pores, which have certain limitations, such as insufficient active sites in macroporous materials, and limited mass transfer and diffusion capabilities in microporous materials.

Method used

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  • Integral electrode with hierarchical pore structure and preparation method and application of integral electrode
  • Integral electrode with hierarchical pore structure and preparation method and application of integral electrode
  • Integral electrode with hierarchical pore structure and preparation method and application of integral electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Monolithic electrode (100 / 20-MoS 2 @NF) Preparation:

[0034]1. Take 16mg of silicon dioxide (100nm) and 9mg of silicon dioxide (20nm) and ultrasonically disperse them in an aqueous solution for 2 hours, then stir them to dryness, then vacuum-dry them at 80°C for 10 hours, take them out and grind them to obtain a reaction template;

[0035] 2. Place nickel foam in hydrochloric acid (1M) and ethanol solution for ultrasonication, each ultrasonic time is 30min, after taking it out, wash it several times with ethanol solution and ultrapure water, and seal it for storage;

[0036] 3. Dissolve 4mg of ammonium molybdate and 10mg of thiourea in 2mL of water, mix them with ultrasonic waves for 30 minutes, add the reaction template in step (1), continue ultrasonic dispersion for 60 minutes, and then evenly drop-coat the dispersed mixed solution on the step ( 2) On the surface of nickel foam treated in the process, place it under a 100W infrared lamp to dry it, and finally vacuum...

Embodiment 2

[0041] Monolithic electrode (400 / 20-MoS 2 @NF) Preparation:

[0042] 1. Take 20mg of silicon dioxide (400nm) and 9mg of silicon dioxide (20nm) and ultrasonically disperse them in an aqueous solution for 2 hours, then stir them to dryness, then vacuum dry them at 80°C for 10 hours, take them out and grind them to obtain a reaction template;

[0043] 2. Place nickel foam in hydrochloric acid (1M) and ethanol solution for ultrasonication, each ultrasonic time is 30min, after taking it out, wash it several times with ethanol solution and ultrapure water, and seal it for storage;

[0044] 3. Dissolve 4mg of ammonium molybdate and 10mg of thiourea in 2mL of water, mix them with ultrasonic waves for 30 minutes, add the reaction template in step (1), continue ultrasonic dispersion for 60 minutes, and then evenly drop-coat the dispersed mixed solution on the step ( 2) On the surface of nickel foam treated in the process, place it under a 100W infrared lamp to dry it, and finally vacuu...

Embodiment 3

[0048] Monolithic electrode (20 / 1.5-MoS 2 @NF) Preparation:

[0049] 1. Take 15mg of silicon dioxide (20nm) and 5mg of silicon dioxide (1.5nm) and ultrasonically disperse them in the aqueous solution for 2 hours, then stir them to dryness, then vacuum dry them at 80°C for 10 hours, take them out and grind them to get the reaction template;

[0050] 2. Place nickel foam in hydrochloric acid (1M) and ethanol solution for ultrasonication, each ultrasonic time is 30min, after taking it out, wash it several times with ethanol solution and ultrapure water, and seal it for storage;

[0051] 3. Dissolve 4mg of ammonium molybdate and 10mg of thiourea in 2mL of water, mix them with ultrasonic waves for 30 minutes, add the reaction template in step (1), continue ultrasonic dispersion for 60 minutes, and then evenly drop-coat the dispersed mixed solution on the step ( 2) On the surface of nickel foam treated in the process, place it under a 100W infrared lamp to dry it, and finally vacuu...

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Abstract

The invention discloses an integral electrode with a hierarchical pore structure and a preparation method and application of the integral electrode. Particularly, the method comprises the following steps: by taking metal foamed nickel as a conductive carrier, constructing a transition metal chalcogenide (TMDs) nanosheet material with the hierarchical pore structure on the surface of the conductive carrier by adopting a double-template method, wherein TMDs nanosheets and the foamed nickel carrier are combined in a chemical bonding manner, so combination is firm, and high stability is achieved; and elements used in the catalyst are non-noble metal elements. The catalyst can be applied to alkaline electrolytic water hydrogen evolution reaction, has high catalytic activity, can ensure long-time high activity under the condition of large current, and has good stability. The preparation method of the integral electrode is a universal method for preparing an efficient water electrolysis hydrogen evolution material, is easy to operate and wide in application range, can be used for preparing integral electrodes of other materials, and has high commercial application value.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a monolithic electrode with a multi-level pore structure and a preparation method and application thereof. Background technique [0002] As an important raw material, hydrogen is widely used in the fields of chemical production, metallurgy, electronics and superconductivity. At the same time, hydrogen can also be directly used as a green and clean fuel in fuel cells and aerospace fuel propellants. At present, hydrogen is mainly produced based on the gasification of coal, biomass or organic waste, or the steam reforming process of natural gas. These traditional hydrogen production processes not only consume a large amount of fossil energy and cause environmental pollution, but also the purity of the obtained hydrogen is low, requiring further separation and purification before it can be used. Hydrogen evolution by electrolysis of water is a carbon-fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/032C25B11/052C25B11/075C25B11/091C25B11/061B01J27/051B01J35/10B01J37/18
CPCC25B1/04B01J27/0515B01J37/18B01J35/33B01J35/60B01J35/40Y02E60/36
Inventor 邓德会郑智龙胡景庭
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI