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

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

Active Publication Date: 2021-02-02
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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  • Chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water and preparation method thereof
  • Chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water and preparation method thereof
  • Chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0026] Step 1: Pretreatment of nickel foam. The nickel foam was cut into 1cm × 5cm blocks, which were ultrasonically cleaned in acetone solution for 10 minutes, then poured into the prepared 3mol / L hydrochloric acid solution for ultrasonic cleaning for 5 minutes, and finally rinsed 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 170 mg of nickel nitrate hexahydrate, 55 mg of chromium nitrate nonahydrate, 30 mg of vanadium chloride, 125 mg of urea, and 13 mg of polyvinyl alcohol, and add 20 ml of ultrapure water, stir magnetically for 20 minutes, and stir evenly to obtain solution A;

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

Embodiment 2

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

[0036] Step 1: Pretreatment of nickel foam. The nickel foam was cut into 1cm×5cm blocks, ultrasonically cleaned in acetone solution for 15min, then poured into the prepared 1mol / L hydrochloric acid solution for ultrasonic cleaning for 10min, and finally rinsed 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 180 mg of nickel nitrate hexahydrate, 65 mg of chromium nitrate nonahydrate, 20 mg of vanadium chloride, 115 mg of urea and 14 mg of polyvinyl alcohol, add 21 ml of ultrapure water, stir magnetically for 21 min, and stir evenly to obtain solution A;

[0038] Step 3: Immerse the spare nickel foam obtained in step 1 in solution A obtained in step 2, transfer it to the hydrothermal ...

Embodiment 3

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

[0042] Step 1: Pretreatment of nickel foam. The nickel foam was cut into 1cm × 5cm blocks, which were ultrasonically cleaned in acetone solution for 11 minutes, then poured into the prepared 2mol / L hydrochloric acid solution for ultrasonic cleaning for 8 minutes, and finally rinsed 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 175 mg of nickel nitrate hexahydrate, 60 mg of chromium nitrate nonahydrate, 25 mg of vanadium chloride, 120 mg of urea, and 15 mg of polyvinyl alcohol, and add 22 ml of ultrapure water, stir magnetically for 22 minutes, and stir evenly to obtain solution A;

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

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Abstract

The invention discloses a chromium-vanadium 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 chromium source, a vanadium source, an alkali source and polyvinyl alcohol uniformly, adding ultrapure water, and stirring the substances uniformly to obtain a solution A; 2) soaking foamed nickel in the solution A obtained in the step 1), and carrying out hydrothermal reaction at 115-125DEG C; and 3) after the hydrothermal reaction is finished, performing natural cooling to room temperature, taking out the reacted foamed nickel, conducting washing and drying to obtain the chromium-vanadium 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 thechromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for fully decomposing water prepared by the preparation method disclosed by the invention has good full water decompositionperformance under an alkaline condition.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic materials, in particular to a chromium-vanadium co-doped nickel-based hydroxide self-supporting electrode for total water splitting and a preparation method thereof. Background technique [0002] With the development of modern industry, the energy crisis and environmental pollution are becoming more and more serious. Hydrogen energy has always been considered as a very promising clean energy because the product is only water, has no pollution and has the advantages of high atomic utilization rate. Electrochemical water splitting It is an important way to effectively prepare hydrogen and further realize its industrialization, which plays an important role in solving the serious energy crisis and increasingly serious environmental pollution. As we all know, the precious metal-based material platinum is recognized as the best catalyst for water electrolysis, but its large-scale use is limite...

Claims

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Application Information

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Patent Type & Authority Applications(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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