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A self-supporting bimetallic nickel-tungsten carbide total water-splitting material and its preparation method

A bimetallic and carbide technology, which is applied in the field of self-supporting bimetallic nickel-tungsten carbide full hydrolysis materials and its preparation, can solve the problems of poor stability, poor conductivity and low catalytic activity, achieve good stability and improve catalytic performance. Active, diffusion-friendly effect

Active Publication Date: 2020-08-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the problems of low catalytic activity, poor stability, poor conductivity, and inability to be used as an electrode to fully split water in the prior art.

Method used

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  • A self-supporting bimetallic nickel-tungsten carbide total water-splitting material and its preparation method
  • A self-supporting bimetallic nickel-tungsten carbide total water-splitting material and its preparation method
  • A self-supporting bimetallic nickel-tungsten carbide total water-splitting material and its preparation method

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Effect test

Embodiment 1

[0037] A method for preparing a nickel-tungsten double metal carbide high-efficiency electrolyzed water material of the present invention comprises the following steps:

[0038] (1) The organic polymer polyacrylonitrile powder is joined in N, N-dimethylformamide solvent, is configured into the spinning solution of mass concentration 12%, gets 0.5g nickel nitrate and 0.5g ammonium metatungstate and joins in In 29 g of polyacrylonitrile / N,N-dimethylformamide solution with a mass fraction of 12 wt%, a uniformly mixed solution was obtained after magnetic stirring for 6 hours, and then the solution was spun by electrospinning, and the spinning was controlled. The wire voltage range is 15kV, the distance from the spinning needle to the receiving device is 10cm, the solution flow rate is 0.05mL / min, and the precursor mixed nanofiber membrane is obtained after continuous spinning for 12 hours;

[0039] (2) Put 0.4g of the mixed nanofiber membrane prepared in step (1) into a corundum b...

Embodiment 2

[0045] A method for preparing a nickel-tungsten double metal carbide high-efficiency electrolyzed water material of the present invention comprises the following steps:

[0046] (1) The organic polymer polyacrylonitrile powder is joined in N, N-dimethylformamide solvent, is configured into the spinning solution of mass concentration 15%, gets 0.3g nickel nitrate and 0.7g ammonium metatungstate and joins in In 15g of polyacrylonitrile / N,N-dimethylformamide solution with a mass fraction of 15wt%, a uniformly mixed solution was obtained after magnetic stirring for 6 hours, and then the solution was spun by electrospinning, and the spinning method was controlled. The wire voltage range is 22kV, the distance from the spinning needle to the receiving device is 18cm, the solution flow rate is 0.1mL / min, and the precursor mixed nanofiber membrane is obtained after continuous spinning for 12 hours;

[0047] (2) Put 0.4g of the mixed nanofiber membrane prepared in step (1) into a corund...

Embodiment 3

[0050] A method for preparing a nickel-tungsten double metal carbide high-efficiency electrolyzed water material of the present invention comprises the following steps:

[0051] (1) The organic polymer polyacrylonitrile powder is joined in N, N-dimethylformamide solvent, is configured into the spinning solution of mass concentration 10%, gets 0.6g nickel nitrate and 0.4g ammonium metatungstate and joins in In 20 g of polyacrylonitrile / N,N-dimethylformamide solution with a mass fraction of 14 wt%, a uniformly mixed solution was obtained after magnetic stirring for 6 hours, and then the solution was spun by electrospinning, and the spinning was controlled. The wire voltage range is 13kV, the distance from the spinning needle to the receiving device is 12cm, the solution flow rate is 0.15mL / min, and the precursor mixed nanofiber membrane is obtained after continuous spinning for 12 hours;

[0052] (2) Put 0.4g of the mixed nanofiber membrane prepared in step (1) into a corundum b...

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Abstract

The invention discloses a self-supporting bimetallic nickel-tungsten carbide complete water electrolysis material and a preparation method thereof, and belongs to the technical field of composite material preparation. According to the method, an electrospinning method and a high-temperature thermal reduction method are adopted for preparing the bimetallic nickel-tungsten carbide water electrolysiscatalytic material, firstly, a hybrid nanofiber membrane containing a tungsten source and a nickel source is prepared by means of the electrospinning method, then the tungsten source and the nickel source form bimetallic nickel tungsten carbide Ni2W4C in situ through pre-oxidation and graphitization in sequence, and therefore the complete water electrolysis material is prepared. The prepared material has the high specific surface area, and the diffusion of an electrolyte solution and the desorption of gas are facilitated; meanwhile, the material can serve as a negative electrode and a positive electrode for complete water electrolysis under alkaline conditions without coating an electrode and can be directly used as an electrode for water electrolysis.

Description

technical field [0001] The invention relates to a self-supporting bimetallic nickel-tungsten carbide total water-splitting material and a preparation method thereof, belonging to the technical field of composite material preparation. Background technique [0002] Energy is an important material basis for the development and survival of human society. The gradual depletion of fossil fuels such as oil and coal and the increasingly serious environmental problems force people to look for a renewable new energy with abundant reserves. Due to its high combustion calorific value, non-polluting combustion products, and recyclable utilization, the development and utilization of hydrogen energy has become one of the hotspots in the field of new energy research. Hydrogen is at the top of the periodic table, with the smallest atomic number, but it is the most common element in nature (accounting for about 75% of the mass of the universe), but it is mainly stored in water in the form of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888C25B1/04C25B11/06
CPCB01J23/888C25B1/04C25B11/04Y02E60/36
Inventor 朱罕杜明亮陆双龙张颂歌王灿段芳
Owner JIANGNAN UNIV
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