A chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for total water splitting and its preparation method

A self-supporting electrode and hydroxide technology, applied in electrodes, electrolysis components, electrolysis processes, etc., can solve the problems of high price and low reserves, and achieve the effect of increasing surface area, enhancing catalytic activity, and enhancing mechanical stability.

Active Publication Date: 2022-03-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, the precious metal-based material platinum is recognized as the best catalyst for electrolysis of water, but its large-scale application is limited due to its high price and low reserves.

Method used

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  • A chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for total water splitting and its preparation method
  • A chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for total water splitting and its preparation method
  • A chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for total water splitting and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the preparation of a chromium-doped nickel-based hydroxide self-supporting electrode of the present invention, and the specific steps include:

[0026] Step 1: Pretreatment of foam nickel. The foamed nickel was cut into 1 cm × 5 cm block, and it washed it in acetone solution for 10 min, then poured into a well-equipped 3 mol / L hydrochloric acid solution for 5 min, and finally washed with anhydrous ethanol and ultrapure water. 3 times, then dry at 25 ° C for 12 hours;

[0027] Step 2: 170 mg of hexahydrate nickel, 55 mg of nine-water nitrate chromium, 30 mg of glycene, 125 mg of urea, 13 mg of polyvinyl alcohol, and 20 ml of ultrapure water, magnetic force for 20min, stir well Get solution A;

[0028] Step 3: Soak the foam nickel of the step in step two in the solution A obtained in step two, transferred to the hydrothermal reaction kettle of the counterpinphenylphenylene and sealed, followed by fixing the inner liner in the outer extrapyl in the ...

Embodiment 2

[0035] The preparation method of the preparation of a chromium-doped nickel-based hydroxide self-supporting electrode of the present invention, and the specific steps include:

[0036] Step 1: Pretreatment of foam nickel. The foamed nickel was cut into a 1 cm × 5 cm block, and it washed it in acetone solution for 15 min, then poured into a 1 mol / L hydrochloric acid solution to ultrasonically cleaning 10 min, and finally washed with anhydrous ethanol and ultrapure water. 2 times, then drying at 35 ° C for 10 hours;

[0037] Step 2: 180 mg of hexahydrate nickel nickel, 65 mg of nine-water chromium, 20 mg of vanadium, 115 mg of urea 14 mg of polyvinyl alcohol is mixed, and 21 ml of ultrapure water, magnetic force is stirred for 21 min, stir evenly Solution A;

[0038] Step 3: Soak the foam nickel of the step in step two in the solution A obtained in step two, transferred to the hydrothermal reaction kettle of the counterpinphenylphenylene and sealed, followed by fixing the inner li...

Embodiment 3

[0041] The preparation method of the preparation of a chromium-doped nickel-based hydroxide self-supporting electrode of the present invention, and the specific steps include:

[0042] Step 1: Pretreatment of foam nickel. The foamed nickel was cut into a block of 1 cm × 5 cm, and it washed it in acetone solution for 11 min, then poured into a mixed 2 mol / L hydrochloric acid solution for 8 minutes, and finally washed with anhydrous ethanol and ultrapure water. 3 times, then dry at 30 ° C drying 11h after 11h;

[0043] Step 2: 175 mg of hexahydrate nickel, 60 mg of nine-water nitrate chromium, 25 mg of vanadium chloride, 120 mg of urea, 15 mg of polyvinyl alcohol, and 22 ml of ultrapure water, magnetic force for 22min, stirring evenly Get solution A;

[0044] Step 3: Soak the foam nickel of the steps obtained in step two, transferred to the hydrothermal reaction kettle of the counterpartenzene, followed by fixing the inner liner in an outer extract, filling The ratio was 62%, and th...

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Abstract

The invention discloses a chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for total water splitting and a preparation method thereof. The specific steps of the preparation method of the invention include: 1): adding a certain amount of nickel source, chromium source, vanadium source, alkali source, and polyvinyl alcohol are mixed evenly, and ultrapure water is added, and stirred evenly to obtain solution A; 2): soak nickel foam in solution A obtained in 1), and conduct Hydrothermal reaction; 3): After the hydrothermal reaction, cool down to room temperature naturally, take out the foamed nickel after the reaction, wash and dry to obtain a self-supporting electrode of chromium-vanadium co-doped nickel-based hydroxide for total water splitting . The preparation method of the present invention has low preparation cost, simple preparation process and easy control of the process. The chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for total water splitting prepared according to the preparation method of the present invention has the properties of Good total water splitting performance.

Description

Technical field [0001] The present invention relates to the technical field of electrocatalytic materials, and more particularly to a chromium-doped nickel-based hydrogen oxide self-supporting electrode and a preparation method thereof. Background technique [0002] With the development of modern industries, energy crises and environmental pollution is growing, hydrogen can be considered to be a very promising clean energy, electrochemical decomposition water It is an important way to effectively prepare hydrogen and further achieve its industrialization, which plays an important role in solving the problem of severe energy crises and increasingly serious environmental pollution. It is well known that precious metal-based material platinum is recognized as the best electrolytic water catalyst, but due to its high price, low reserves limit large-scale use. [0003] A large number of studies are committed to developing a high-performance and high-performance electrocatalyst having ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/031C25B11/052C25B11/061C25B11/075
CPCC25B1/04Y02E60/36
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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