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V-doped Ni3S2/NF electrode material with short rods self-assembled into dendritic shape and preparation method thereof

An electrode material and self-assembly technology, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve the problems of high price, limited large-scale use, and scarce reserves, etc., to improve catalytic activity, not easy to agglomerate, and mild reaction conditions Effect

Active Publication Date: 2019-02-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

IrO 2 , RuO 2 and Pt are considered to be the most efficient water-splitting OER and HER catalysts, respectively, but their expensive and scarce reserves limit their large-scale use.

Method used

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  • V-doped Ni3S2/NF electrode material with short rods self-assembled into dendritic shape and preparation method thereof
  • V-doped Ni3S2/NF electrode material with short rods self-assembled into dendritic shape and preparation method thereof
  • V-doped Ni3S2/NF electrode material with short rods self-assembled into dendritic shape and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) The conductive substrate was immersed in acetone solution for ultrasonic cleaning for 10 minutes, then transferred to 2 mol / L hydrochloric acid for ultrasonic cleaning for 10 minutes, and finally rinsed alternately with ethanol and ultrapure water for 3 times, and then vacuum-dried at 35 °C for 10 hours;

[0019] (2) Prepare a precursor solution, which contains nickel chloride hexahydrate with a concentration of 0.05mol / L, vanadium chloride with a concentration of 0.0125mol / L, ammonium fluoride with a concentration of 0.05mol / L and a concentration of 0.05mol / L. 0.125) mol / L urea aqueous solution, magnetic stirring at room temperature for 20min to obtain clear solution A. Transfer the clear 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, in which the reaction filling ratio should be controlled at 40%. After the hydrothermal reaction was over, the reactio...

Embodiment 2

[0022] (1) Immerse 1cm x 5cm nickel foam in acetone solution for ultrasonic cleaning for 10 minutes, then transfer to 2mol / L hydrochloric acid for ultrasonic cleaning for 10 minutes, and finally rinse with ethanol and ultrapure water alternately for 3 times, and then at 35 °C Vacuum drying for 10h;

[0023] (2) Prepare a precursor solution, which contains nickel chloride hexahydrate with a concentration of 0.1 mol / L, vanadium chloride with a concentration of 0.04 mol / L, ammonium fluoride with a concentration of 0.05 mol / L and a concentration of 0.05 mol / L. It is an aqueous solution of 0.2 mol / L urea, which is magnetically stirred for 20 min at room temperature to obtain a clear solution A. Transfer the clear 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, in which the reaction filling ratio should be controlled at 40%. After the hydrothermal reaction was over, th...

Embodiment 3

[0026] (1) Immerse the nickel foam of 1cm x 5cm in acetone solution for ultrasonic cleaning for 5 minutes, then immerse the nickel foam in 2mol / L hydrochloric acid for ultrasonic cleaning for 5 minutes, and finally rinse with ethanol and ultrapure water alternately for 3 times. After vacuum drying at ℃ for 10, the treated nickel foam was obtained;

[0027] (2) Prepare a precursor solution, which contains nickel chloride hexahydrate with a concentration of 0.1 mol / L, vanadium chloride with a concentration of 0.05 mol / L, ammonium fluoride with a concentration of 0.05 mol / L and a concentration of 0.05 mol / L. It is an aqueous solution of 0.2 mol / L urea, which is magnetically stirred for 20 min at room temperature to obtain a clear solution A. Transfer the clear 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, in which the reaction filling ratio should be controlled at 30%. Aft...

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Abstract

The invention provides a V-doped Ni3S2 / NF electrode material with short rods self-assembled into a dendritic shape. The V-doped Ni3S2 / NF electrode material comprises a nickel foam base and V-doped Ni3S2 with the nano-short rods self-assembled into the dendritic shape, and the V-doped Ni3S2 is grown on the nickel foam base. The preparation method of the material comprises the following steps that the cleaned nickel foam is soaked in a precursor solution containing nickel chloride, vanadium chloride, ammonium fluoride and urea, and first-time hydrothermal reaction is performed; the reacted nickel foam is soaked in an ethanol and water mixed solution containing thioacetamide, second-time hydrothermal reaction is performed, and the V-doped Ni3S2 / NF electrode material with the short rods self-assembled into the dendritic shape is obtained. The method has the advantages that the reaction condition is mild, the morphology of the catalyst is regulated and controlled through doping of metal ions, the generated product has a three-dimensional stable structure, and agglomeration is not prone to occurrence in the electrocatalysis process.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, and in particular relates to a kind of V-doped Ni in which short rods are self-assembled into dendrites 3 S 2 / NF electrode material and preparation method thereof. Background technique [0002] At present, the energy crisis and environmental problems have always been research hotspots. Hydrogen energy is a clean, efficient and non-polluting environment-friendly energy carrier, and is considered to be one of the most potential substitutes for fossil energy. The technology of electrolysis of water to produce hydrogen and oxygen is favored by people and is now a research hotspot. Its main purpose is to develop electrocatalysts with high activity and strong stability. IrO 2 , RuO 2 Pt and Pt are considered to be the most efficient OER and HER catalysts for water splitting, respectively, but their high price and scarcity limit their large-scale use. [0003] In recent years, transition...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/03C25B1/04
CPCC25B1/04C25B11/031C25B11/051C25B11/091Y02E60/36
Inventor 黄剑锋刘倩倩冯亮亮曹丽云张晓
Owner SHAANXI UNIV OF SCI & TECH
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