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Beta-Ni(OH)2 electrode prepared by solvothermal method as well as method and application thereof

A solvothermal and electrode technology, applied in electrodes, electrolysis process, electrolysis components, etc., to achieve the effect of simple process, short preparation period and stable structure

Active Publication Date: 2021-02-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the use of cobalt oxyhydroxides as additives and other modification methods has also played a great role in improving the properties of nickel electrodes, but it also has its own shortcomings. Therefore, in Ni(OH) 2 The acquisition is the premise basis for its bulk density, surface morphology, and structure, and it is necessary to find a way to prepare high-quality Ni(OH) 2 method is crucial

Method used

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  • Beta-Ni(OH)2 electrode prepared by solvothermal method as well as method and application thereof
  • Beta-Ni(OH)2 electrode prepared by solvothermal method as well as method and application thereof
  • Beta-Ni(OH)2 electrode prepared by solvothermal method as well as method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Cut the nickel foam into 1.5×4.0cm 2 Rectangular slices were cleaned and dried at room temperature in a vacuum oven;

[0038] 2) The molar ratio is (2~3):1 Measure deionized water and absolute ethanol, prepare 20mL of ethanol solution, weigh 38.753~39.567g of vanadium chloride, 73~77mg of urea, dissolve them in deionized In a solution composed of water and absolute ethanol, stir at room temperature for 30 minutes, then add 210-220 mg of treated foam nickel to obtain a mixed solution;

[0039] 3) Then add 0.345-0.465 g of hexadecyltrimethylammonium bromide morphology control agent to the mixed solution, stir at room temperature for 30 minutes, then place the mixed solution in an oven at 155° C. for 21 hours;

[0040] 4) After the reaction is over, after naturally cooling to room temperature, take out the nickel foam, and rinse it with ultrapure water and absolute ethanol five times;

[0041] 5) Finally, put the rinsed nickel foam into a vacuum oven to dry at room te...

Embodiment 2

[0044] 1) Cut the nickel foam into 1.5×4.0cm 2 Rectangular slices were cleaned and dried in a vacuum box at room temperature;

[0045] 2) Prepare 20 mL of ethanol solution with deionized water and absolute ethanol at a molar ratio of (2-3):1, weigh 38.753-39.567 g of vanadium chloride and 73-77 mg of urea, and dissolve them in the ethanol solution , stirred at room temperature for 30 minutes, and then put in 210-220 mg of treated foam nickel to obtain a mixed solution;

[0046] 3) Then add 0.345-0.465 g of hexadecyltrimethylammonium bromide morphology control agent to the mixed solution, stir at room temperature for 30 minutes, and then place the mixed solution in an oven at 153° C. for 22 hours;

[0047] 4) After the reaction is over, after naturally cooling to room temperature, take out the nickel foam, and rinse it with ultrapure water and absolute ethanol five times;

[0048] 5) Finally, put the rinsed nickel foam into a vacuum oven to dry at room temperature for 8 hours...

Embodiment 3

[0051] 1) Cut the nickel foam into 1.5×4.0cm 2 Rectangular slices were cleaned and dried in a vacuum box at room temperature;

[0052] 2) Prepare 20 mL of ethanol solution with deionized water and absolute ethanol at a molar ratio of (2-3):1, weigh 38.753-39.567 g of vanadium chloride and 73-77 mg of urea, and dissolve them in the ethanol solution , stirred at room temperature for 30 minutes, and then put in 210-220 mg of treated foam nickel to obtain a mixed solution;

[0053] 3) Then add 0.345-0.465 g of hexadecyltrimethylammonium bromide morphology control agent to the mixed solution, stir at room temperature for 30 minutes, then place the mixed solution in an oven at 150° C. for 23 hours;

[0054] 4) After the reaction is over, after naturally cooling to room temperature, take out the nickel foam, and rinse it with ultrapure water and absolute ethanol five times;

[0055] 5) Finally, put the rinsed nickel foam into a vacuum oven to dry at room temperature for 8 hours to ...

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Abstract

The invention discloses a beta-Ni(OH)2 electrode prepared by a solvothermal method as well as a method and application of the beta-Ni(OH)2 electrode. Ni(OH)2 is vertically arranged on a foamed nickelsheet substrate by adopting a solvothermal method, taking a foamed nickel sheet as a substrate, taking an ethanol solution of vanadium chloride and urea as a vanadium source and taking hexadecyltrimethylammonium bromide as a morphology regulating agent, high-density and large-surface-area catalytic site activity is exposed, the electron transfer rate is increased, the electro-catalytic performanceis improved, the foamed nickel sheet substrate is not only beneficial to electron transmission, nickel comes from an original position, generated Ni(OH)2 is tightly connected with foamed nickel, thestructure is more stable, and the prepared beta-Ni(OH)2 electrode has excellent electro-catalytic performance, and when the beta-Ni(OH)2 electrode is applied to a water electrolysis catalytic reactionunder an alkaline condition, the electro-catalytic hydrogen and oxygen production performance of electrolyzed water is improved.

Description

technical field [0001] The invention belongs to the field of preparation of new energy materials, in particular to β-Ni(OH) prepared by solvothermal method 2 Electrodes with methods and applications. Background technique [0002] Nowadays, with the rapid development of modern industry in all countries in the world, the demand for energy has also increased sharply. However, since the end of the 20th century, we have faced a huge energy crisis and increasingly serious environmental pollution problems. Therefore, saving limited energy and controlling pollution is an urgent task. The research of electrocatalysis science just meets this requirement. Recent studies have shown that transition metals and their oxides, hydroxides, nitrides, phosphates, and selenides not only exhibit excellent HER and OER electrochemical performance in alkaline electrolyte solutions, but also have cheap, earth-abundant resources, etc. advantage. [0003] Judging from the current research situation,...

Claims

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Application Information

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IPC IPC(8): C25B11/031C25B11/061C25B11/075C25B1/04
CPCC25B1/04Y02E60/36
Inventor 曹丽云黄青青何丹阳冯亮亮黄剑锋韩瑞雪
Owner SHAANXI UNIV OF SCI & TECH
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