Preparation method of nickel/vanadium layered double hydroxide nano-sheet array water oxidation catalyst

A nanosheet array, hydroxide technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problem of uneven product distribution and uneven product morphology. Regularity, complex preparation process and other problems, to achieve the effect of being conducive to full contact, uniform morphology, and uniform chemical composition

Inactive Publication Date: 2017-12-22
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

China Invention Announcement Patent No. 201610060321.X discloses a preparation method of nickel-vanadium hydrotalcite / carbon composite material, which is prepared by co-precipitation method. The steps are cumbersome, the atmosphere and other requirements are high, and the technology is difficult.
Nickel-Based Layered Double Hydroxide From Guest Vanadium OxideAnions.Hae Woong Park et al prepared Ni V-LDH by co-precipitation method, the product distribution is not uniform, and the preparation process is complicated
Preparation of nickel-vanadium hydrotalcite and its carbon composites and research on supercapacitive performance. Chu Xiaoyan prepared nickel-vanadium hydrotalcite with different nickel-vanadium ion ratios by co-precipitation method, but the preparation process was complicated and the product morphology was irregular

Method used

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  • Preparation method of nickel/vanadium layered double hydroxide nano-sheet array water oxidation catalyst
  • Preparation method of nickel/vanadium layered double hydroxide nano-sheet array water oxidation catalyst
  • Preparation method of nickel/vanadium layered double hydroxide nano-sheet array water oxidation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0023] 1) Sonicate 2×5 cm of nickel foam in pure acetone solution for 10 minutes, then immerse the nickel foam in 2mol / L hydrochloric acid for ultrasonic cleaning, and finally wash it with ethanol and deionized water alternately, and finally clean it at 25°C Vacuum drying 10h obtains the foamed nickel after processing;

[0024] 2) Take NiCl according to the molar ratio of 2:0.5:5 2 ·6H 2 O, VCl 3 and Co(NH 2 ) 2 At the same time, add it to deionized water so that the concentration of the nickel source is 0.1mol / L, and stir magnetically at room temperature to obtain a clear solution A;

[0025] 3) Put the nickel foam treated in step 1) into the reaction liner, then pour solution A into the reaction liner and seal it. The reaction filling ratio should be controlled at 20%, and then the inner liner is fixed in the outer kettle After placing it in a homogeneous reactor, then carry out a hydrothermal reaction at 90°C;

[0026] 4) After the hydrothermal reaction is completed, ...

Embodiment 2

[0028] 1) Sonicate 2×5 cm of nickel foam in pure acetone solution for 10 minutes, then immerse the foam nickel in 3mol / L hydrochloric acid for ultrasonic cleaning, and finally wash it with ethanol and deionized water alternately, and finally clean it at 25°C Vacuum drying 12h obtains the foamed nickel after processing;

[0029] 2) Take NiCl according to the molar ratio of 2.5:1:5.5 2 ·6H 2 O, VCl 3 and Co(NH 2 ) 2 At the same time, add it to deionized water so that the concentration of the nickel source is 0.15mol / L, and magnetically stir at room temperature to obtain a clear solution A;

[0030] 3) Put the nickel foam treated in step 1) into the reaction liner, then pour solution A into the reaction liner and seal it. The reaction filling ratio should be controlled at 50%, and then the inner liner is fixed in the outer kettle After placing it in a homogeneous reactor, then carry out a hydrothermal reaction at 110°C;

[0031] 4) After the hydrothermal reaction is complet...

Embodiment 3

[0033] 1) Sonicate 2×5 cm of nickel foam in pure acetone solution for 10 minutes, then immerse the foam nickel in 3mol / L hydrochloric acid for ultrasonic cleaning, and finally wash it with ethanol and deionized water alternately, and finally clean it at 25°C Vacuum drying 12h obtains the foamed nickel after processing;

[0034] 2) Take NiCl according to the molar ratio of 3:1.5:6 2 ·6H 2 O, VCl 3 and Co(NH 2 ) 2 At the same time, add it to deionized water so that the concentration of the nickel source is 0.2mol / L, and stir magnetically at room temperature to obtain a clear solution A;

[0035] 3) Put the nickel foam treated in step 1) into the reaction lining, then pour solution A into the reaction lining and seal it. The reaction filling ratio should be controlled at 60%, and then the inner lining is fixed in the outer kettle After placing it in a homogeneous reactor, then carry out a hydrothermal reaction at 130°C;

[0036] 4) After the hydrothermal reaction is complet...

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Abstract

The invention provides a preparation method of a nickel / vanadium layered double hydroxide nano-sheet array water oxidation catalyst. The preparation method includes the steps of: 1) soaking foam nickel in a pure acetone solution for ultrasonic washing, soaking foam nickel in hydrochloric acid for ultrasonic washing, alternately washing the foam nickel with ethanol and deionized water, and finally vacuum-drying the foam nickel to obtain treated foam nickel; 2) simultaneously adding NiCl2.6H2O, VCl3 and Co(NH2)2 to deionized water to obtain a clear solution A; and 3) placing the foam nickel in a reaction lining, pouring the solution A into the reaction lining, sealing the reaction lining, and arranging and fixing the reaction lining in an outer kettle, placing the kettle in a homogeneous-phase reactor to perform hydrothermal reaction, and naturally cooling the reaction product to room temperature; 4) moving the cooled foam nickel product out, alternately washing the foam nickel product with water and alcohol, collecting the product, and vacuum-drying the product to obtain NiV-LDH nano-sheet array. The produce has homogeneous chemical composition, high purity and uniform appearance, and has excellent electrochemical performance when being used as an electrode material for electrolyzing water.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic materials, relates to the preparation and application of semiconductor optoelectronic materials, in particular to a preparation method of a nickel vanadium double metal hydroxide nanosheet array water oxidation catalyst. Background technique [0002] Electrocatalytic water splitting technology is one of the effective ways to produce hydrogen and oxygen, and it is one of the most potential technologies for developing sustainable and clean energy. In the process of water splitting, water oxidation is the rate-controlling step in the process of water splitting, which restricts the whole process of water splitting. Therefore, finding an electrocatalyst for efficient water splitting is the focus of many researchers. Hydrotalcite, also known as layered double hydroxides (LDHs), is an anionic layered compound, due to its unique two-dimensional laminate structure, adjustable composition, and ion ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847C25B1/04C25B11/06
CPCB01J23/8472B01J35/0033B01J35/02B01J37/10C25B1/04C25B11/051C25B11/057C25B11/091Y02E60/36
Inventor 黄剑锋刘倩倩冯亮亮曹丽云吴建鹏杨丹何元元席乔
Owner SHAANXI UNIV OF SCI & TECH
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