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Preparation method of nanosheet array electrocatalyst

A technology of nanosheet array and electrocatalyst, which is applied in the field of electrochemistry, can solve the problem of less water splitting reaction of binary metal selenide, and achieve the effect of easy large-scale production, large-scale production, and improvement of embrittlement

Active Publication Date: 2020-11-17
ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite some progress, few studies have been reported on the water-splitting reaction of binary metal selenides

Method used

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  • Preparation method of nanosheet array electrocatalyst
  • Preparation method of nanosheet array electrocatalyst
  • Preparation method of nanosheet array electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of nanosheet array NiCoSe@NF1 includes the following steps:

[0027] 1) Preparation of nanosheet array ZIF-67@NF:

[0028] 11) Pretreatment of foamed nickel, the foamed nickel is cleaned before use, ultrasonicated with 3.0M hydrochloric acid, acetone and water respectively for 20 minutes, then rinsed several times with absolute ethanol, dried at 60°C for 6 hours, and the pretreated foam is obtained nickel.

[0029] 12) Disperse 1.3136g of 2-methylimidazole and 0.582g of cobalt nitrate hexahydrate (the corresponding molar number at this time is 0.2mmol) in 40ml of deionized water, stir magnetically for 10min, and quickly pour 2-methylimidazole into Co(NO 3 ) 2 ·6H 2 In the O solution, the transparent solution quickly turned blue-purple, and continued to stir for 5 minutes.

[0030] 13) Put a piece of 2*4cm -2 The nickel foam was put into it, and after standing for 4 hours, it was washed several times with deionized water and absolute ethanol, and dr...

Embodiment 2

[0034] For the preparation of nanosheet array NiCoSe@NF2, the amount of selenium powder in step 3) in Example 1 was changed to 2 mmoles of selenium powder, and the amounts of other steps and components were kept unchanged to obtain nanosheet array NiCoSe@NF2.

[0035] For the preparation of nanosheet array NiCoSe@NF3, the amount of selenium powder in step 3) in Example 1 was changed to 4 mmoles of selenium powder, and the amounts of other steps and components were kept unchanged to obtain nanosheet array NiCoSe@NF3.

[0036] For the preparation of nanosheet array NiCoSe@NF4, the amount of selenium powder in step 3) in Example 1 was changed to 6 mmoles of selenium powder, and the amounts of other steps and components were kept unchanged to obtain nanosheet array NiCoSe@NF4.

[0037] For the preparation of nanosheet array NiCoSe@NF5, the amount of selenium powder in step 3) in Example 1 was changed to 8 mmoles of selenium powder, and the amounts of other steps and components were...

Embodiment 3

[0040] Embodiment 3 performance test

[0041] 1. The nanosheet array NiCoSe@NF2 was characterized by scanning electron microscopy, and the field emission scanning electron microscopy (FESEM) image analysis was carried out on a 10.0kV JEOLJ SM-7800F. The results are as follows figure 2 shown. From figure 2 It can be seen that NiCoSe nanosheets with uniform size grow on the surface of nickel foam, which becomes thinner than the thickness of precursor nanosheets, which is more conducive to the penetration of electrolyte and the improvement of electrochemical properties.

[0042] 2. Use the Cu target radiation source of Mac Science MXP-18 X-ray diffractometer to conduct X-ray diffraction on the nanosheet array NiCoSe@NF2, the results are as follows image 3 shown. image 3 is the X-ray diffraction pattern of the nanosheet array NiCoSe@NF2 of the present invention. It can be seen from the figure that the target product contains the diffraction peaks of NiSe, CoSe and Ni at th...

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Abstract

The invention relates to a preparation method of a nanosheet array electrocatalyst, in particular to a preparation method of a NiCoSe mesoporous nanosheet array-coating NF electrocatalyst with excellent electrochemical properties. The experimental method for preparing the NiCoSe-coating NF nanosheet array by taking C4H6N2, Co(NO3)2.6H2O, C2H6O, selenium powder, NaOH and N2H4.H2O as main raw materials is characterized by comprising the following steps: firstly, synthesizing a ZIF67-coating NF nanosheet array, then obtaining the NiCo LDH nanosheet array-coating NF with a mesoporous structure through ion exchange in water and ethanol solution, and finally conducting selenizing for 12h, so as to achieve preparation of a target product.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a preparation method of a nanosheet array electrocatalyst. Background technique [0002] Electrochemical water splitting is considered to be one of the most attractive and sustainable approaches for efficient renewable energy production and conversion. Water splitting is divided into two half-reactions: hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). To facilitate these two reactions, noble metal compounds are state-of-the-art catalysts such as Pt, Pd for HER and IrO for OER 2 , RuO 2 Wait. However, their poor stability and high price limit their extensive use in industry. To address this issue, non-noble metal electrocatalysts such as transition metal selenides, phosphides, sulfides, carbon, and alloys have been intensively studied. However, in practical applications, the cathode and anode should work in the same electrolyte to maintain the...

Claims

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Application Information

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IPC IPC(8): B01J27/057C25B1/04C25B11/06
CPCB01J27/0573C25B1/04B01J35/33Y02E60/36
Inventor 司宇曾乐贵王宏民刘影贺珍妮郭玉周月
Owner ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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