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NiSe2-CoSe2/CFs composite material with micro-nano two-stage pores and high structural stability and preparation of NiSe2-CoSe2/CFs composite material

A composite material and double-stage pore technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of active phase structure instability, short service life of electrodes, etc., to achieve rich active sites, rich super-gas repellency, The effect of excellent mechanical stability

Active Publication Date: 2021-11-05
XIAN AERONAUTICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the three-dimensional integrated electrode materials loaded with M(Co, Ni)-Se2 reported in the literature, the active phase of M(Co, Ni)-Se2 is mostly nanowires or The nanosheet array structure is the main structure. When this type of structure is used in the production of electrolyzed water with high current for a long time, due to the intense exchange of liquid and gas phase substances on the surface of the electrode, and the electrode is under severe service conditions such as high temperature and strong corrosion, Qualcomm The M(Co,Ni)-Se2 active phase in the form of nanowires or nanosheet arrays is prone to structural instability under the long-term impact of a large amount of precipitated gas, resulting in a short service life of the electrode

Method used

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  • NiSe2-CoSe2/CFs composite material with micro-nano two-stage pores and high structural stability and preparation of NiSe2-CoSe2/CFs composite material
  • NiSe2-CoSe2/CFs composite material with micro-nano two-stage pores and high structural stability and preparation of NiSe2-CoSe2/CFs composite material
  • NiSe2-CoSe2/CFs composite material with micro-nano two-stage pores and high structural stability and preparation of NiSe2-CoSe2/CFs composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A NiSe with micro-nano dual-level pores and high structural stability 2 -CoSe 2 The preparation method of / CFs composite material, comprises the following steps:

[0042] Step 1, the porous carbon fiber, 0.3g Ni(NO 3 ) 2 , 0.15g CoSO 4 , 0.1g urea and 30mL deionized water were mechanically stirred and mixed evenly to obtain a precursor solution; the precursor solution was hydrothermally grown in a 50mL autoclave, the hydrothermal growth temperature was 120°C, and the reaction time was 8h to obtain a carbon fiber supported The basic nickel-cobalt carbonate nanowire primary product; the carbon fiber-loaded basic nickel-cobalt carbonate nanowire primary product is cleaned, that is, it is washed with acetone, ethanol, and deionized water in sequence, and then placed in a vacuum oven at 70 ° C. Dry at a temperature of 12 hours to obtain a carbon fiber-loaded basic nickel-cobalt carbonate nanowire precursor; wherein, the carbon fiber-loaded basic nickel-cobalt carbonate na...

Embodiment 2

[0047] A NiSe with micro-nano dual-level pores and high structural stability 2 -CoSe 2 The preparation method of / CFs composite material, comprises the following steps:

[0048] Step 1, the porous carbon fiber, 0.4g Ni(NO 3 ) 2 , 0.2g Co(NO 3 ) 2 , 0.1g urea and 35mL deionized water were mechanically stirred and mixed evenly to obtain a precursor solution; the precursor solution was hydrothermally grown in a 50mL autoclave, the hydrothermal growth temperature was 130°C, and the reaction time was 10h to obtain a carbon fiber loaded The basic nickel-cobalt carbonate nanowire primary product; the carbon fiber-loaded basic nickel-cobalt carbonate nanowire primary product is cleaned, that is, it is washed with acetone, ethanol, and deionized water in sequence, and then placed in a vacuum oven at 70 ° C. Dry at a temperature of 12 hours to obtain a carbon fiber-loaded basic nickel-cobalt carbonate nanowire precursor;

[0049] Among them, the atomic ratio of Ni and Co in the car...

Embodiment 3

[0054] A NiSe with micro-nano dual-level pores and high structural stability 2 -CoSe 2 The preparation method of / CFs composite material, comprises the following steps:

[0055] Step 1, the porous carbon fiber, 0.28gNiSO 4 , 0.15gCo(NO 3 ) 2 , 0.1g urea and 30mL of deionized water were mechanically stirred and mixed evenly to obtain a precursor solution; the precursor solution was hydrothermally grown in a 50mL autoclave, the hydrothermal growth temperature was 120°C, and the reaction time was 10h to obtain a carbon fiber loaded The basic nickel-cobalt carbonate nanowire primary product; the carbon fiber-loaded basic nickel-cobalt carbonate nanowire primary product is cleaned, that is, it is washed with acetone, ethanol, and deionized water in sequence, and then placed in a vacuum oven at 70 ° C. Dry at a temperature of 12 hours to obtain a carbon fiber-loaded basic nickel-cobalt carbonate nanowire precursor;

[0056] Among them, the atomic ratio of Ni and Co in the carbon...

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Abstract

The invention discloses a NiSe2-CoSe2 / CFs composite material with micro-nano two-stage pores and high structural stability and preparation of the NiSe2-CoSe2 / CFs composite material. The composite material comprises a micron-stage porous carbon fiber matrix and a nano foamed NiSe2-CoSe2 material loaded on the carbon fiber matrix, and the atomic ratio of Ni to Co is (1.6-2.5):1. The carbon fiber loaded NiSe2-CoSe2 composite material is prepared by using a hydrothermal method and a chemical vapor deposition method, and is subjected to heat treatment in the atmosphere of H2 and N2. The product provided by the invention has excellent mechanical stability. When the product is directly applied to a cathode electrode for water electrolysis hydrogen production, the destructive effect of gas impact on the structural stability of an active phase of the electrode under the industrial large-current long-time service condition can be relieved, the mechanical stability of the electrode is remarkably improved, and therefore the service life of the electrode is prolonged, and the water electrolysis cost is reduced.

Description

technical field [0001] The invention relates to the technical field of hydrogen production by electrolysis of water, in particular to a NiSe with micro-nano double-stage pores and high structural stability 2 -CoSe 2 / CFs composites and their preparation. Background technique [0002] With the rapid advancement of industrialization, the demand for energy is increasing day by day. Fossil fuels, mainly oil and coal, are about to be exhausted as conventional energy sources, and the extensive use of fossil fuels has led to CO 2 Emissions have seriously exceeded standards and aggravated various environmental pollution problems such as global warming and smog. Due to the advantages of zero carbon, high energy density, storability, and easy transportation, hydrogen energy has gradually attracted more and more attention from the industry. The hydrogen production technology of water electrolysis can decompose the most abundant water resources on the earth into hydrogen gas. The who...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/065C25B11/091C25B11/031C25B1/04
CPCC25B11/054C25B11/065C25B11/091C25B11/031C25B1/04Y02E60/36
Inventor 张龙鲁媛媛杨森
Owner XIAN AERONAUTICAL UNIV
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