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Preparation method of electrocatalytic material B-VS2 for ENRR

A B-VS2, electrocatalysis technology, applied in chemical instruments and methods, electrodes, vanadium compounds, etc., can solve problems such as poor stability, and achieve stable catalytic performance and concentrated size distribution.

Active Publication Date: 2021-11-05
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0004] Aiming at the problem of poor stability performance of existing catalysts, the present invention aims to prepare a method of doped catalyst B-VS2 capable of stabilizing the active center of the catalyst, which can stabilize the catalytic performance for a long period of time, thereby increasing the ammonia production. Rate

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  • Preparation method of electrocatalytic material B-VS2 for ENRR
  • Preparation method of electrocatalytic material B-VS2 for ENRR
  • Preparation method of electrocatalytic material B-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 B-VS for ENRR 2 , the material is mainly composed of microspheres with a particle size of about 1 μm.

[0021] Preparation method: Mix 5 mmol of ammonium metavanadate, 15 mmol of thioacetamide, 0.75 mmol of boric acid 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 microwave 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 Heated to 180°C for 10 minutes, and kept at this temperature for 120 minutes; finally cooled naturally to room ...

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Abstract

The invention discloses a preparation method of an electrocatalytic material B-VS2 for ENRR, and belongs to the field of electrocatalytic nitrogen fixation. The method comprising the following steps: mechanically mixing precursors, carrying out microwave hydrothermal treatment on a precursor solution, and carrying out suction filtration, washing and vacuum drying on a solid obtained by the hydrothermal treatment to obtain B-VS2. The preparation method is mainly used for preparing the B-VS2 electro-catalysis nitrogen fixation material, and the problem that the stability performance is poor when the boron-undoped VS2 is used for ENRR is solved. Compared with that an active center V<4+> is reduced to V<2+> to lose activity in the process of obtaining vanadium disulfide VS2 by taking ammonium metavanadate as a vanadium source and taking thioacetamide as a sulfur source in a hydrothermal manner, the preparation method has the advantages that B-VS2 is obtained by taking ammonium metavanadate as the vanadium source, taking thioacetamide as the sulfur source and taking boric acid as a boron source in a hydrothermal manner, the V<4+> active center is stabilized by doping boron, and further, the catalytic performance of the ENRR is stabilized.

Description

technical field [0001] The invention belongs to the field of electrocatalytic reduction of nitrogen to produce ammonia, and specifically discloses an electrocatalytic material B-VS for ENRR 2 method of preparation. Background technique [0002] Ammonia is an important industrial raw material in modern society, widely used in chemical industry, plastic manufacturing, explosives and dyes and other industries. The Haber-Bosch method plays a leading role in global ammonia synthesis, but its process is carried out under high temperature and pressure conditions, accompanied by high energy consumption and CO 2 The issue of emissions. Among various strategies, electrochemical nitrogen reduction reaction (ENRR) is considered as a promising method due to its green nature and easy large-scale setup. However, its practical application is greatly limited due to its very low productivity, which is very dependent on the used electrocatalyst. Therefore, finding novel electronic catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/27C01G31/00
CPCC25B11/091C25B1/27C01G31/006
Inventor 严乙铭迟新月赵瑞王晓璇熊媛媛
Owner BEIJING UNIV OF CHEM TECH
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