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Sulfur-doped iron selenide nanorod material, and preparation method and application thereof

An iron selenide, nanorod technology, applied in iron sulfide, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of limited performance, limitation, increase synthesis cost and time, etc., to reduce Production cost, low cost, effect of reducing d-orbit overlap

Active Publication Date: 2021-06-15
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Iron diselenide (FeSe 2 ) surface with Fe active sites for improved conductivity and OH - The adsorption, however, of FeSe 2 The OER performance of FeSe is still limited, and the current FeSe 2 The synthesis needs purified fine chemicals as raw materials, which increases the cost and time of synthesis, thus greatly restricting its practical application

Method used

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  • Sulfur-doped iron selenide nanorod material, and preparation method and application thereof
  • Sulfur-doped iron selenide nanorod material, and preparation method and application thereof
  • Sulfur-doped iron selenide nanorod material, and preparation method and application thereof

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preparation example Construction

[0030] Aiming at the problems existing in the prior art, the invention provides a preparation method for a sulfur-doped iron selenide nanorod material, comprising the following steps:

[0031] S1, under the protective gas atmosphere, using sulfur powder, selenium powder and soluble iron salt as raw materials, prepare a homogeneous mixed solution;

[0032] S2. Using the homogeneous mixture prepared in S1 at 100-250° C. to prepare a sulfur-doped iron selenide nanorod material through a hydrothermal reaction.

[0033] Among them, the soluble iron salts commonly used at present can all be applicable to the above method. In order to describe the technical solution of the present invention in detail, only ferric chloride is taken as an example. The present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiment 1

[0035] The preparation method of the sulfur-doped iron selenide nanomaterial provided in Example 1 of the present invention comprises the following steps:

[0036] Such as figure 1 As shown, first, 0.016g of sublimed sulfur powder and 0.118g of selenium powder were dissolved in 8mL of organic solvent under the protection of nitrogen, and fully stirred to form a solution one. Dissolve 0.162g of ferric chloride in 25mL of water under the protection of nitrogen, and fully stir to form solution 2. Slowly pour solution one into solution two to form a mixed solution. Then, the mixed solution was rapidly magnetically stirred at room temperature for 20 minutes, then the mixture was transferred to a stainless steel autoclave, and the autoclave was placed in an oven at 180°C for 24 hours; finally, the temperature of the autoclave was cooled to room temperature , the mixture was centrifuged and washed to obtain a black precipitate, which was ultrasonically dispersed, washed alternately...

Embodiment 2

[0038] The preparation method of the sulfur-doped iron selenide nanomaterial provided in Example 2 of the present invention comprises the following steps:

[0039] Firstly, 0.022g of sublimed sulfur powder and 0.104g of selenium powder were dissolved in 8mL of organic solvent under the protection of nitrogen, and fully stirred to form solution 1. Dissolve 0.162g of ferric chloride in 25mL of water under the protection of nitrogen, and fully stir to form solution 2. Slowly pour solution one into solution two to form a mixed solution. Then, the mixed solution was rapidly magnetically stirred at room temperature for 20 minutes, then the mixture was transferred to a stainless steel autoclave, and the autoclave was placed in an oven at 180°C for 24 hours; finally, the temperature of the autoclave was cooled to room temperature , the mixture was centrifuged and washed to obtain a black precipitate, which was ultrasonically dispersed, washed alternately with absolute ethanol and wat...

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Abstract

The invention belongs to the technical field of electro-catalytic water decomposition, and particularly relates to a sulfur-doped iron selenide nanorod material, and a preparation method and application thereof. The preparation method comprises the following steps: S1, in the protective gas atmosphere, dissolving sulfur powder, selenium powder and soluble iron salt in a solvent to obtain a mixture; and S2, performing heat treatment on the mixture prepared in step S1 at the temperature of 100-250 DEG C, cooling to room temperature, and purifying to obtain the sulfur-doped iron selenide nanorod material. The sulfur powder, the selenium powder and the soluble iron salt are used as raw materials, the sulfur-doped iron selenide nanorod material is prepared through a one-step hydrothermal method, the sulfur-doped iron selenide nanorod material is used as an OER electrochemical catalyst, and the catalytic activity is improved; and the preparation method has the advantages that the raw materials are easy to obtain and low in price, the synthesis process is simple, and the production cost is greatly reduced, so that a new path is provided for finding and researching the high-activity and low-cost iron-based electrolyzed water catalyst in the future, and the iron-based electrolyzed water catalyst is expected to play an important role in wider emerging fields.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic water splitting, and in particular relates to a sulfur-doped iron selenide nanorod material and its preparation method and application. Background technique [0002] The depletion of fossil fuels and climate change have prompted people to study clean and sustainable energy sources. The electrochemical decomposition of water to produce hydrogen and oxygen has been considered as a clean and sustainable energy storage and conversion technology, which is expected to become an alternative to fossil fuels. Taste. Oxygen evolution reaction (OER) is the half-reaction that determines the efficiency of water splitting due to its four electron transfer steps (4OH - →O 2 (g)+2H 2 O+4e - ) often react slowly, thus, high-performance OER catalysts are crucial to improve electrode kinetics and stability. Although IrO 2 and RuO 2 Exhibits excellent OER activity, but the high cost and scarcity of re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/00C01B19/04C01G49/12C25B1/04C25B11/091B82Y40/00B82Y30/00
CPCC01B19/002C01B19/007C01G49/12C25B1/04B82Y40/00B82Y30/00C01P2004/16C01P2004/80Y02E60/36
Inventor 林健健高孟友郑德华荆忠鑫
Owner QINGDAO UNIV OF SCI & TECH
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