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Preparation method and applications of self-supported carbon cloth loaded cobaltous selenide nickel nanowires

A technology of nickel nanowires and cobalt selenide, which is applied in the fields of catalysis and energy storage, can solve the problems of high cost of precious metal catalysts, few catalysts, poor stability, etc., and achieves high-efficiency catalytic electrolysis of water for hydrogen evolution and oxygen evolution. High stability effect

Inactive Publication Date: 2019-11-19
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the challenges of high cost and poor stability of precious metal catalysts in the current water electrolysis process, and few catalysts can be used for both hydrogen evolution and oxygen evolution in electrolysis water, and provides a preparation of self-supporting carbon cloth-loaded cobalt-nickel selenide nanowires Method and application for bifunctional catalytic water splitting

Method used

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  • Preparation method and applications of self-supported carbon cloth loaded cobaltous selenide nickel nanowires
  • Preparation method and applications of self-supported carbon cloth loaded cobaltous selenide nickel nanowires
  • Preparation method and applications of self-supported carbon cloth loaded cobaltous selenide nickel nanowires

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Measure nitric acid with a mass fraction of 10% and sulfuric acid with a mass fraction of 10% according to the volume ratio of 3:1 with a graduated cylinder, add it to a 50mL beaker and stir evenly to obtain a nitric acid / sulfuric acid mixture; cut 3x3 cm 2 Put the carbon cloth into the solution and soak it completely for 1 hour; after soaking, take out the carbon cloth and wash it repeatedly with deionized water until PH = 7, and dry it in an oven at 60°C to obtain a hydrophilic carbon cloth;

[0033] (2) Weigh 1.45g Co(NO 3 ) 2 , 0.59g NiCl 2 ·6H 2 O, 0.45g H 2 NCONH 2 , added to a beaker containing 35ml of deionized water, stirred evenly with a magnetic stirrer; immersed in the fully wetted hydrophilic carbon cloth into the beaker, and ultrasonically treated for 10 minutes; finally, the carbon cloth and the solution were transferred to the reactor for water For heat treatment, the temperature was raised to 150°C at a heating rate of 5°C / min and kept for 16 h...

Embodiment 2

[0036] (1) with embodiment 1;

[0037] (2) with embodiment 1;

[0038] (3) During the selenization process of the sample, the target temperature was raised to 600°C, and finally marked as SeCoNi NWs / CC-600, and the rest were the same as step (3) of Example 1.

Embodiment 3

[0040] (1) with embodiment 1;

[0041] (2) with embodiment 1;

[0042] (3) During the selenization process of the sample, the target temperature was raised to 700°C, which was marked as SeCoNi NWs / CC-700, and the rest were the same as step (3) of Example 1.

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Abstract

The invention discloses a preparation method and applications of self-supported carbon cloth loaded cobaltous selenide nickel nanowires. The preparation method comprises following steps: conductive carbon cloth is taken as a substrate material, a cobalt nickel double metal salt and the hydrophilic carbon cloth are subjected to low temperature hydro-thermal reaction so as to obtain cobalt nickel nanowires uniformly grown on the carbon cloth; further high temperature selenylation is carried out so as to botain the cobaltous selenide nickel nanowires uniformly loaded by the carbon cloth, and theobtained product is taken as a self-supported electrode material in catalytic water electrolysis reaction. The double metal nanometer catalytic material is low in cost, simple in preparation technology, and unique in nanowire structure, and is capable of catalyzing water electrolysis hydrogen evolution and oxygen evolution reaction; in electrode preparation process, no binder is needed, excellentdurability is achieved, and a new idea is provided for preparation of non-noble metal based double function electrocatalysts.

Description

technical field [0001] The invention relates to the fields of catalysis and energy storage, in particular to a preparation method and application of self-supporting carbon cloth-supported cobalt-nickel selenide nanowires. Background technique [0002] Excessive use of fossil energy has caused problems such as energy depletion and environmental pollution. The development of green and clean energy can not only relieve the pressure on the traditional energy system, but also benefit the protection of the environment and ecology. Hydrogen energy is considered as an ideal "green" carrier to replace traditional fossil fuels due to its high combustion value, easy storage and transportation, and no polluting gases after combustion. At present, the global hydrogen production methods mainly include fossil fuel hydrogen production, photocatalytic hydrogen production, biological hydrogen production and electrochemical hydrogen production. Compared with the previous methods of hydrogen p...

Claims

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Application Information

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IPC IPC(8): B01J27/057B01J35/00B01J37/02B01J37/08B01J37/10C25B1/04C25B11/06
CPCB01J27/0573B01J37/10B01J37/08B01J37/0217C25B1/04C25B11/051B01J35/33Y02E60/36
Inventor 彭新文黄平权杜帆
Owner SOUTH CHINA UNIV OF TECH
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