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Preparation method of electro-catalytic material VS2 for ENRR

A technology of electrocatalysis and vanadium disulfide, applied in chemical instruments and methods, electrodes, vanadium compounds, etc., can solve the problems of difficult unification of physical characteristics of materials, long reaction time, etc., and achieve the effect of concentrated size distribution and shortened time

Pending Publication Date: 2022-01-11
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

In the traditional catalyst preparation process, the common hydrothermal method that is often used not only has a long reaction time, but also consumes a lot of energy, and the physical characteristics of the obtained materials are difficult to unify.

Method used

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  • Preparation method of electro-catalytic material VS2 for ENRR
  • Preparation method of electro-catalytic material VS2 for ENRR
  • Preparation method of electro-catalytic material VS2 for ENRR

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Embodiment Construction

[0019] The following will be further described in detail through specific embodiments, but the present invention is not limited to the following examples.

[0020] combine figure 1 As shown, an electrocatalytic material VS for ENRR 2 , the material is mainly composed of microspheres with a particle size of about 1 μm.

[0021] Preparation method: Mix 3 mmol of ammonium metavanadate, 15 mmol of thioacetamide and 40 mL of ultrapure water, and stir magnetically for 1 hour to obtain a light green turbid liquid. The above liquid was transferred to a microwave reactor, and the hydrothermal synthesis was carried out according to the following process: heating from room temperature to 120°C for 10 minutes, and keeping at this temperature for 8 minutes; then heating to 150°C for 10 minutes, and keeping at this temperature for 8 minutes; then 10 minutes Heated to 180°C, and kept at this temperature for 120min; finally cooled naturally to room temperature. The power used in the microw...

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Abstract

A preparation method of an electro-catalytic material VS2 for ENRR belongs to the field of electro-catalytic nitrogen fixation. The method comprises the following steps: mechanically mixing a precursor, performing microwave hydrothermal treatment on a precursor solution, and performing suction filtration, washing and vacuum drying on solid obtained by the hydrothermal treatment to obtain the VS2. The method is mainly used for preparing the VS2 electro-catalysis nitrogen fixation material, and the problem that the performance of VS2 prepared through a common hydrothermal method is poor when the VS2 is used for ENRR is solved. In addition, compared with vanadium disulfide VS2-x obtained by taking sodium orthovanadate as a vanadium source and thioacetamide as a sulfur source in a hydrothermal mode, pure vanadium disulfide VS2 with +4-valence V is obtained by taking ammonium metavanadate as the vanadium source and thioacetamide in a hydrothermal mode, and the corresponding ENRR performance of the vanadium disulfide VS2 is more excellent.

Description

technical field [0001] The invention belongs to the field of electrocatalytic reduction of nitrogen to produce ammonia, and specifically discloses an electrocatalytic material VS for ENRR. 2 method of preparation. Background technique [0002] With the continuous consumption of non-renewable fossil fuels and the excessive emission of greenhouse gases, the energy crisis and environmental degradation have become increasingly prominent. It is imperative to find new and clean energy with abundant reserves to gradually replace fossil fuels and realize green and sustainable development. . As a clean energy carrier, ammonia has a higher energy density than hydrogen, and its combustion products are also environmentally friendly. The N in the atmosphere as a source of ammonia 2 very rich. Compared to compressed hydrogen (hydrogen storage and transport), NH 3 Easily liquefied at ambient temperature and pressure ≈8 bar, providing a high volumetric energy density (10.5 mJ / L), which ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00C25B1/00C25B1/27C25B11/052C25B11/077
CPCC01G31/00C25B1/27C25B1/00C25B11/052C25B11/077C01P2004/61C01P2004/32C01P2004/03C01P2004/04C01P2002/72
Inventor 严乙铭赵瑞王晓璇迟新月熊媛媛
Owner BEIJING UNIV OF CHEM TECH
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