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Hill-shaped in-situ nickel-vanadium double-metal hydroxide catalyst as well as preparation method and application thereof

A hydroxide, bimetallic technology, applied in the field of electrocatalytic materials, achieves the effects of low synthesis temperature, enhanced mechanical stability, and simple preparation process

Active Publication Date: 2020-01-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the previous reports on the synthesis of LDH, the solvent used was mainly water or a mixed solvent of water and alcohol, and few people used alcohol and nitrogen methyl pyrrolidone as a solvent.

Method used

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  • Hill-shaped in-situ nickel-vanadium double-metal hydroxide catalyst as well as preparation method and application thereof
  • Hill-shaped in-situ nickel-vanadium double-metal hydroxide catalyst as well as preparation method and application thereof
  • Hill-shaped in-situ nickel-vanadium double-metal hydroxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step 1: Take the cut 1cm×4.5cm nickel foam and clean it ultrasonically in acetone for 12 minutes, then ultrasonically clean it in 1mol / L hydrochloric acid for 8 minutes, then rinse it alternately with absolute ethanol and ultrapure water for 3 times, and finally clean it at 28°C. After vacuum drying for 15 h, it was used for later use.

[0042] Step 2: Take 62.92 mg of vanadium chloride and 66 mg of urea and add them to the mixed solvent of nitrogen methyl pyrrolidone and alcohol with a volume ratio of 1:11 at the same time, and stir evenly for 15 minutes to obtain solution A;

[0043] Step 3: Pour solution A into a 50mL reaction inner kettle, then put the nickel foam treated in step 1 into it to soak it, and then put the inner kettle in the outer kettle and fix it in a homogeneous reactor. The filling ratio is 61%, and the solvothermal reaction is carried out at 115°C for 25h at a speed of 5r / min;

[0044] Step 4: After the reaction is over, cool the reactor to room t...

Embodiment 2

[0056] Step 1: Take the cut 1cm×4.5cm nickel foam and clean it ultrasonically in acetone for 15 minutes, then ultrasonically clean it in 3mol / L hydrochloric acid for 5 minutes, then wash it alternately with absolute ethanol and ultrapure water for 4 times, and finally clean it at 29°C It was dried under vacuum for 14 hours before use.

[0057] Step 2: Take 70.78 mg of vanadium chloride and 78.00 mg of urea and add them to the mixed solvent of nitrogen methyl pyrrolidone and alcohol with a volume ratio of 1:9 at the same time, and stir evenly for 16 minutes to obtain solution A;

[0058] Step 3: Pour solution A into a 50mL reaction inner kettle, then put the nickel foam treated in step 1 into it to soak it, and then put the inner kettle in the outer kettle and fix it in a homogeneous reactor. The filling ratio is 60%, and the solvothermal reaction is carried out at 118°C for 25h at a speed of 6r / min;

[0059] Step 4: After the reaction is over, cool the reactor to room tempera...

Embodiment 3

[0062] Step 1: Take the cut 1cm×4.5cm nickel foam and clean it ultrasonically in acetone for 13 minutes, then ultrasonically clean it in 2mol / L hydrochloric acid for 7 minutes, then rinse it alternately with absolute ethanol and ultrapure water for 3 times, and finally clean it at 30°C After vacuum drying for 13 hours, it was used for later use.

[0063] Step 2: Take 62.89 mg of vanadium chloride and 68.40 mg of urea and add them to the mixed solvent of nitrogen methyl pyrrolidone and alcohol with a volume ratio of 1:10 at the same time, and stir evenly for 17 minutes to obtain solution A;

[0064] Step 3: Pour solution A into a 50mL reaction inner kettle, then put the nickel foam treated in step 1 into it to soak it, and then put the inner kettle in the outer kettle and fix it in a homogeneous reactor. The filling ratio is 62%, and the solvothermal reaction is carried out at 120 °C for 24 hours at a speed of 7 r / min;

[0065] Step 4: After the reaction is over, cool the reac...

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Abstract

The invention discloses a hill-shaped in-situ nickel-vanadium double-metal hydroxide catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: step 1, pretreating foamed nickel; 2, adding vanadium chloride and urea into a mixed solvent of alcohol and Nitrogen-methyl pyrrolidone at the same time; 3, soaking the treated foamed nickel in asolution A, and carrying out solvothermal reaction for 23-25 hours at 115-125 DEG C; and 4, after the reaction is finished, naturally cooling a reaction kettle to room temperature, alternately cleaning with water and alcohol, collecting and drying to obtain the hill-shaped in-situ nickel-vanadium double-metal hydroxide catalyst. The preparation method has the characteristics of simple preparationprocess, low synthesis temperature, no need of large-scale equipment and harsh conditions and the like by adopting the solvothermal method, and the prepared hill-shaped in-situ nickel-vanadium double-metal hydroxide catalyst has high activity and high stability, and has good total water splitting performance under alkaline and neutral conditions.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, in particular to a hill-shaped in-situ nickel-vanadium double metal hydroxide catalyst and its preparation method and application. Background technique [0002] With the increasing environmental pollution and the rapid consumption of fossil fuels, it is imperative to develop renewable and sustainable energy. Owing to its carbon-free emission, electrolysis of water to produce hydrogen (H 2 ) and oxygen (O 2 ) is considered one of the most promising and competitive solutions [1] In the field of electrocatalysis, noble metal-based materials (oxides of Pt, Ru, or Ir) are currently the best electrocatalysts for hydrogen production, while scarcity and high cost severely limit their practical applications. [0003] Therefore, in recent years, researchers have devoted themselves to the development of non-precious metal hydrogen-producing electrocatalysts composed of high-abundance elements in...

Claims

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Application Information

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IPC IPC(8): C25B11/03C25B11/06C25B1/04B01J23/847
CPCC25B1/04B01J23/8472C25B11/057C25B11/031C25B11/075C25B11/051B01J35/33Y02E60/36
Inventor 曹丽云何丹阳冯亮亮黄剑锋吴建鹏赵亚娟杨丹
Owner SHAANXI UNIV OF SCI & TECH
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