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Ferrochrome co-doped nickel-based hydroxide self-supporting electrode for fully hydrolyzing water and preparation method thereof

A self-supporting electrode and hydroxide technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of restricting the wide application of catalysts, high price, low reserves, etc., to achieve multiple reaction active sites, low cost, high temperature low effect

Pending 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

Noble metal-based materials (such as Pt, Ru or Ir oxides) are currently recognized as the best catalysts for water splitting, but their high price and low reserves greatly limit the wide application of such catalysts.

Method used

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  • Ferrochrome co-doped nickel-based hydroxide self-supporting electrode for fully hydrolyzing water and preparation method thereof
  • Ferrochrome co-doped nickel-based hydroxide self-supporting electrode for fully hydrolyzing water and preparation method thereof
  • Ferrochrome co-doped nickel-based hydroxide self-supporting electrode for fully hydrolyzing water and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The preparation method of the chromium-iron co-doped nickel-based hydroxide self-supporting electrode for total water splitting of the present invention, the specific steps include:

[0027] 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;

[0028] Step 2: Mix 170mg of nickel nitrate hexahydrate, 55mg of chromium nitrate nonahydrate, 45mg of ferric chloride hexahydrate, 125mg of urea, and 1.5mL of dimethylformamide, and add 20ml of ultrapure water, magnetic Stir for 20min, stir evenly to obtain solution A;

[0029] Step 3: Soak the spare nickel foam obtained in step 1 in the solution A obtained in step 2, transfer it to the hydrothermal reaction kettle of...

Embodiment 2

[0037] The preparation method of the chromium-iron co-doped nickel-based hydroxide self-supporting electrode for total water splitting of the present invention, the specific steps include:

[0038] 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;

[0039] Step 2: Mix 180mg of nickel nitrate hexahydrate, 65mg of chromium nitrate nonahydrate, 35mg of ferric chloride hexahydrate, 115mg of urea, and 1.6mL of dimethylformamide, and add 21ml of ultrapure water, magnetically Stir for 21min, stir evenly to obtain solution A;

[0040] Step 3: Soak the spare nickel foam obtained in step 1 in the solution A obtained in step 2, transfer it to the hydrothermal reaction kettle...

Embodiment 3

[0043] The preparation method of the chromium-iron co-doped nickel-based hydroxide self-supporting electrode for total water splitting of the present invention, the specific steps include:

[0044] 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;

[0045] Step 2: Mix 175mg of nickel nitrate hexahydrate, 60mg of chromium nitrate nonahydrate, 40mg of ferric chloride hexahydrate, 120mg of urea, and 1.7mL of dimethylformamide, and add 22ml of ultrapure water. Stir for 22 minutes, stir evenly to obtain solution A;

[0046] Step 3: Soak the spare nickel foam obtained in step 1 in the solution A obtained in step 2, transfer it to the hydrothermal reaction kettle of p-p...

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Abstract

The invention discloses a ferrochrome co-doped nickel-based hydroxide self-supporting electrode for fully hydrolyzing water and a preparation method thereof. The preparation method comprises the specific steps that: 1) uniformly mixing a certain amount of nickel source, chromium source, iron source, alkali source and dimethylformamide, adding ultrapure water, and uniformly stirring to obtain a solution A; 2) soaking foamed nickel in the solution A obtained in the step 1), and carrying out hydrothermal reaction at 125-135 DEG C; and 3) after the hydrothermal reaction is finished, naturally cooling to room temperature, taking out the reacted foamed nickel, washing and drying to obtain the ferrochrome co-doped nickel-based hydroxide self-supporting electrode for fully hydrolyzing 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-iron co-doped nickel-based hydroxide self-supporting electrode for fully hydrolyzing water prepared by the preparation method disclosed by the invention has good fully 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-iron co-doped nickel-based hydroxide self-supporting electrode for total water splitting and a preparation method thereof. Background technique [0002] With the intensification of environmental pollution and the energy shortage caused by the massive consumption of fossil fuels, the development of efficient, low-cost, and environmentally friendly new energy technologies is of great significance to the next generation of energy science and technology. Hydrogen, as a green, sustainable and clean energy, will be the key to mankind One of the ideal energy sources in the future, and the electrocatalytic hydrogen production technology using water as raw material will be an important green way to provide hydrogen energy. Designing efficient and low-cost catalysts is the core and key of electrocatalytic hydrogen production. Noble metal-based materials (such ...

Claims

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Application Information

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IPC IPC(8): C25B11/031C25B11/061C25B11/091C25B1/04
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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