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Preparation method of high-entropy metal sulfide NiMnCoCuCrSx

A metal sulfide, high-entropy technology, used in electrolysis components, electrodes, electrolysis processes, etc.

Pending Publication Date: 2022-07-08
QILU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are no related reports on the application of DESs in the preparation of high-entropy metal sulfides (HEMS) with multiple metal elements

Method used

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  • Preparation method of high-entropy metal sulfide NiMnCoCuCrSx
  • Preparation method of high-entropy metal sulfide NiMnCoCuCrSx
  • Preparation method of high-entropy metal sulfide NiMnCoCuCrSx

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Accurately weigh polyethylene glycol 200 and thiourea with a molar ratio of 2:1 to form a deep eutectic solvent (DESs) in an oil bath at 60 °C; take 70 mL of DESs and add 0.002 mol of NiCl respectively 2 ·6H 2 O, MnCl 2 ·4H 2 O, CoCl 2 ·6H 2 O, CuCl 2 ·2H 2 O, CrCl 3 ·6H 2 O, stir in an oil bath at 60°C to form a homogeneous solvent. The formed solvent was transferred to a 100 mL reaction kettle and placed in an oven for reaction (240° C., 12 h). After the reaction was completed, it was naturally cooled to room temperature, and the filtrate was discarded by filtration. The obtained solid was washed three times with ethanol and deionized water, respectively, and dried.

Embodiment 2

[0034] Accurately weigh polyethylene glycol 200 and thiourea with a molar ratio of 2:1 to form a deep eutectic solvent (DESs) in an oil bath at 60 °C; take 70 mL of DESs and add 0.001 mol of NiCl respectively 2 ·6H 2 O, MnCl 2 ·4H 2 O, CoCl 2 ·6H 2 O, CuCl 2 ·2H 2 O, CrCl 3 ·6H 2 O, stir in an oil bath at 60°C to form a homogeneous solvent. The formed solvent was transferred to a 100 mL reaction kettle and placed in an oven for reaction (240° C., 12 h). After the reaction was completed, it was naturally cooled to room temperature, and the filtrate was discarded by filtration. The obtained solid was washed three times with ethanol and deionized water, respectively, and dried.

Embodiment 3

[0036] Accurately weigh polyethylene glycol 200 and thiourea with a molar ratio of 2:1 to form a deep eutectic solvent (DESs) in an oil bath at 60 °C; take 70 mL of DESs and add 0.003 mol of NiCl respectively 2 ·6H 2 O, MnCl 2 ·4H 2 O, CoCl 2 ·6H 2 O, CuCl 2 ·2H 2 O, CrCl 3 ·6H 2O, stir in an oil bath at 60°C to form a homogeneous solvent. The formed solvent was transferred to a 100 mL reaction kettle and placed in an oven for reaction (240° C., 12 h). After the reaction was completed, it was naturally cooled to room temperature, and the filtrate was discarded by filtration. The obtained solid was washed three times with ethanol and deionized water, respectively, and dried.

[0037] Morphology of the product obtained in Example 1 was carried out. The morphology of the product was observed by SEM, and the composition and crystal form of the product were identified by XRD.

[0038] figure 1 High-entropy metal sulfide NiMnCoCuCrS prepared in Example 1 of the present i...

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Abstract

The invention discloses a preparation method of high-entropy metal sulfide NiMnCoCuCrSx, which comprises the following steps: 1) mixing polyethylene glycol and thiourea, and heating to form a deep eutectic solvent (DESs); 2) adding Ni salt, Mn salt, Co salt, Cu salt and Cr salt into DESs, and heating to form a uniform solution; and (3) transferring the obtained solution into a reaction kettle, reacting, after the reaction is finished, naturally cooling to room temperature, filtering, respectively washing the obtained solid with ethanol and deionized water for three times, and drying. The preparation method is easy to operate and low in preparation cost, large-scale production can be achieved, and the obtained NiMnCoCuCrSx material is controllable in nanoparticle size and has a good crystal form.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials and preparation thereof, and in particular relates to a high-entropy metal sulfide NiMnCoCuCrS x preparation method. Background technique [0002] Electrochemical water splitting has been shown to be an economical, clean and efficient energy conversion technology and has received great attention in the past decades. However, further development of this technology has been hindered by the slow kinetics of oxygen evolution. Therefore, the development of efficient, durable, and low-cost electrocatalysts is crucial for promoting the industrialization process of OER as well as reducing overpotentials and improving overall OER performance. Recently, transition metal sulfides (M x S y ) catalysts with good electrical conductivity and potential electrocatalytic activity have become promising candidates to solve this problem. However, transition metal sulfides suffer from poor stabi...

Claims

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Application Information

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IPC IPC(8): C25B11/042C25B1/04
CPCC25B11/042C25B1/04Y02E60/36
Inventor 牟红宇李晓茵张德瑞陈静茹白艳玲孟艳芝董艺发
Owner QILU INST OF TECH