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Nanometer forest-shaped V-doped Ni3S2/NF self supporting electrode and preparation method thereof

A self-supporting electrode, forest technology, applied in the direction of electrode, electrode shape/type, electrolysis process, etc., can solve the problems of not being able to perform at the same time, mismatch between hydrogen-producing end and oxygen-producing end, etc., to achieve short reaction time and improve conductivity and electron transfer efficiency, the effect of simple steps

Active Publication Date: 2019-01-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although they can exhibit excellent HER or OER performance in acidic or alkaline environments, their hydrogen-producing ends do not match with oxygen-producing ends, and cannot be performed simultaneously in the same electrolyte.
Therefore, the synthesis of dual electrocatalysts capable of producing both hydrogen and oxygen under the same working conditions remains a great challenge.

Method used

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  • Nanometer forest-shaped V-doped Ni3S2/NF self supporting electrode and preparation method thereof
  • Nanometer forest-shaped V-doped Ni3S2/NF self supporting electrode and preparation method thereof
  • Nanometer forest-shaped V-doped Ni3S2/NF self supporting electrode and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0017] (1) Immerse the conductive substrate in acetone solution for ultrasonic cleaning for 10 minutes, then transfer it to 2mol / L hydrochloric acid for ultrasonic cleaning for 10 minutes, and finally wash it alternately with ethanol and ultrapure water for 3 times, and then dry it in vacuum at 35°C for 10 hours;

[0018] (2) Configure a precursor solution, which contains nickel chloride at a concentration of 0.05mol / L, vanadium chloride at a concentration of 0.0125mol / L, ammonium fluoride at a concentration of 0.05mol / L and a concentration of 0.125 ) mol / L aqueous solution of urea, magnetically stirred at room temperature for 20 minutes to obtain a clear solution A. Transfer the clarified solution A and the conductive substrate treated in step (1) into a high-temperature and high-pressure hydrothermal kettle, and then react at 100°C for 18 hours, and the reaction filling ratio should be controlled at 40%. After the hydrothermal reaction was completed, the reactor was naturall...

Embodiment 2

[0021] (1) Soak nickel foam of 1cm x 5cm in acetone solution for 10 minutes, then transfer it to 2mol / L hydrochloric acid for 10 minutes, and finally rinse it with ethanol and ultrapure water for 3 times, and then clean it at 35°C. Vacuum drying for 10h;

[0022] (2) Configure a precursor solution, which contains nickel chloride at a concentration of 0.1mol / L, vanadium chloride at a concentration of 0.04mol / L, ammonium fluoride at a concentration of 0.05mol / L and a concentration of 0.2 The aqueous solution of mol / L urea was magnetically stirred at room temperature for 20 minutes to obtain a clear solution A. Transfer the clarified solution A and the conductive substrate treated in step (1) into a high-temperature and high-pressure hydrothermal kettle, and then react at 120°C for 14 hours, and the reaction filling ratio should be controlled at 40%. After the hydrothermal reaction was completed, the reactor was naturally cooled to room temperature, and then the conductive subst...

Embodiment 3

[0025] (1) Sonicate 1cm x 5cm nickel foam in acetone solution for 5 minutes, then immerse foam nickel in 2mol / L hydrochloric acid for 5 minutes, and finally rinse with ethanol and ultrapure water for 3 times respectively. After vacuum drying for 10°C, the treated foamed nickel was obtained;

[0026] (2) Configure a precursor solution, which contains nickel chloride at a concentration of 0.1mol / L, vanadium chloride at a concentration of 0.05mol / L, ammonium fluoride at a concentration of 0.05mol / L and 0.2 The aqueous solution of mol / L urea was magnetically stirred at room temperature for 20 minutes to obtain a clear solution A. Transfer the clarified solution A and the nickel foam treated in step (1) into a high-temperature and high-pressure hydrothermal kettle, and then react at 140°C for 10 hours, and the reaction filling ratio should be controlled at 30%. After the hydrothermal reaction was completed, the reactor was naturally cooled to room temperature, and then the conduct...

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Abstract

The invention relates to a nanometer forest-shaped V-doped Ni3S2 / NF self supporting electrode, which comprises a nickel foam substrate and a nanometer forest-shaped V-doped Ni3S2 coating layer growingon the surface of the nickel foam substrate. A preparation method of the self supporting electrode comprises the following steps of soaking clean nickel foam into a precursor solution containing nickel chloride, vanadium chloride, ammonium fluoride and urea; performing first hydrothermal reaction; soaking the reacted nickel foam into a water solution of thioacetamide; performing second hydrothermal reaction at 120 to 160 DEG C for the reaction time of 15 to 24h to obtain the nanometer forest-shaped V-doped Ni3S2 / NF self supporting electrode. The electrode material does not need the use of a bonding agent; the generated electrode material has good OER and HER catalysis activity in a 1M KOH solution.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, in particular to a nano-forest V-doped Ni 3 S 2 / NF self-supporting electrode and its preparation method. Background technique [0002] With the development of society and economy, the excessive use of traditional fossil energy has exacerbated environmental pollution and global warming, forcing people to seek a new type of alternative energy is imminent. Electrocatalytic water splitting can convert electrical energy converted from solar energy, wind energy, and water energy into hydrogen energy, so electrolytic water technology is considered to be one of the effective ways to generate hydrogen and oxygen. However, a large energy barrier needs to be overcome in the actual water electrolysis process, resulting in low energy utilization. Currently, IrO 2 , RuO 2 Pt and Pt are considered to be the most effective water splitting OER and HER catalysts, respectively, but the high price and...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B11/06C25B11/03C25B1/04
CPCC25B1/04C25B11/031C25B11/051C25B11/075Y02E60/36
Inventor 黄剑锋刘倩倩冯亮亮曹丽云杨丹张晓
Owner SHAANXI UNIV OF SCI & TECH
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