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Chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water and preparation method thereof

A self-supporting electrode, hydroxide technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problem of carbon dioxide emission and environmental pollution, high potential barrier and slow reaction rate of electrolyzed water, difficult to promote and use on a large scale, etc. problem, to achieve the effect of improving catalytic activity and stability, multiple reactive active sites, and convenient open area

Inactive Publication Date: 2021-02-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the first two preparation methods still need to consume fossil fuels, which cannot solve the problems of carbon dioxide emissions and environmental pollution.
After research, it is found that electrolysis of water is currently the most promising method for sustainable hydrogen production. The cost of traditional noble metal-based electrocatalysts is too high to be widely used. In order to solve the problems of high potential barrier and slow reaction rate in electrolysis of water itself, There is an urgent need to find a non-precious metal-based electrocatalyst with good performance

Method used

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  • Chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water and preparation method thereof
  • Chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water and preparation method thereof
  • Chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] The preparation method of the chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for total water splitting of the present invention, the specific steps include:

[0026] Step 1: Pretreat the nickel foam. Cut the nickel foam into 1cm×5cm blocks, ultrasonically clean it in acetone solution for 10min, then pour it into the prepared 3mol / L hydrochloric acid solution for ultrasonic cleaning for 5min, and finally rinse it alternately with absolute ethanol and ultrapure water 3 times, and then vacuum-dried at 25°C for 12 hours before use;

[0027] Step 2: Mix 170mg of nickel nitrate hexahydrate, 55mg of chromium nitrate nonahydrate, 40mg of aluminum chloride hexahydrate, 125mg of urea, 1.5mL of dimethylformamide and 0.25g of polyvinylpyrrolidone, and add 20ml ultrapure water, magnetically stirred for 20min, and stirred evenly to obtain solution A;

[0028] Step 3: Soak the spare nickel foam obtained in step 1 in the solution A obtained in step 2, tra...

Embodiment 2

[0035] The preparation method of the chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for total water splitting of the present invention, the specific steps include:

[0036] Step 1: Pretreat the nickel foam. Cut the nickel foam into 1cm×5cm blocks, ultrasonically clean it in acetone solution for 15min, then pour it into the prepared 1mol / L hydrochloric acid solution for ultrasonic cleaning for 10min, and finally rinse it alternately with absolute ethanol and ultrapure water 2 times, and then vacuum-dried at 35°C for 10 hours before use;

[0037] Step 2: Mix 180mg of nickel nitrate hexahydrate, 65mg of chromium nitrate nonahydrate, 30mg of aluminum chloride hexahydrate, 115mg of urea, 1.6mL of dimethylformamide and 0.26g of polyvinylpyrrolidone, and add 21ml ultrapure water, magnetically stirred for 21min, and stirred evenly to obtain solution A;

[0038] Step 3: Soak the spare nickel foam obtained in step 1 in the solution A obtained in step 2, tr...

Embodiment 3

[0041] The preparation method of the chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for total water splitting of the present invention, the specific steps include:

[0042]Step 1: Pretreat the nickel foam. Cut the nickel foam into 1cm×5cm blocks, ultrasonically clean it in acetone solution for 11min, then pour it into the prepared 2mol / L hydrochloric acid solution for ultrasonic cleaning for 8min, and finally rinse it alternately with absolute ethanol and ultrapure water 3 times, and then vacuum-dried at 30°C for 11 hours before use;

[0043] Step 2: Mix 175mg of nickel nitrate hexahydrate, 60mg of chromium nitrate nonahydrate, 35mg of aluminum chloride hexahydrate, 120mg of urea, 1.7mL of dimethylformamide and 0.27g of polyvinylpyrrolidone, and add 22ml ultrapure water, magnetically stirred for 22min, and stirred evenly to obtain solution A;

[0044] Step 3: Soak the spare nickel foam obtained in step 1 in the solution A obtained in step 2, tran...

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Abstract

The invention discloses a chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water and a preparation method thereof. The preparation method comprises thespecific steps of: (1) mixing a certain amount of a nickel source, a certain amount of a chromium source, a certain amount of an aluminum source, a certain amount of an alkali source, a certain amount of dimethylformamide and a certain amount of polyvinylpyrrolidone to a uniform state, adding ultra-pure water, and stirring to a uniform state to obtain a solution A; (2) soaking foamed nickel in the solution A obtained in the step (1), and carrying out hydrothermal reaction at 105-115 DEG C; and (3) after the hydrothermal reaction is finished, naturally cooling to room temperature, taking out the reacted foamed nickel, and carrying out washing and drying to obtain the chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water. The preparation method disclosed by the invention is low in preparation cost, simple in preparation process and easy to control in process, and the chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for fully hydrolyzing water prepared by the preparation method disclosed by the invention has good water full hydrolyzing performance under an alkaline condition.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic materials, in particular to a chromium-aluminum co-doped nickel-based hydroxide self-supporting electrode for total water splitting and a preparation method thereof. Background technique [0002] As a clean energy source, hydrogen has the advantages of good thermal conductivity, high ideal calorific value, environmental friendliness, and high utilization rate. With the aggravation of the global energy crisis and environmental pollution, hydrogen, a clean energy source, has been extensively studied. [0003] At present, there are three main methods for industrial hydrogen production: steam reforming of methane, coal gasification process and electrolysis of water. Obviously, the first two preparation methods still need to consume fossil fuels, which cannot solve the problems of carbon dioxide emissions and environmental pollution. After research, it is found that electrolysis of water is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/031C25B11/061C25B11/091C25B1/04
CPCC25B1/04C25B11/04Y02E60/36
Inventor 曹丽云刘振婷何丹阳冯亮亮黄剑锋
Owner SHAANXI UNIV OF SCI & TECH
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