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Doped carbon material catalyst as well as preparation method and application thereof

A technology of catalysts and carbon materials, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as harsh reaction conditions, and achieve the effect of inhibiting hydrolysis

Inactive Publication Date: 2020-07-03
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the harsh reaction conditions of the traditional ammonia synthesis Haber process at high temperature and high pressure, and the need to use noble metal catalysts for electrocatalytic reduction of nitrite

Method used

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  • Doped carbon material catalyst as well as preparation method and application thereof
  • Doped carbon material catalyst as well as preparation method and application thereof
  • Doped carbon material catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1.4 g of polyvinyl alcohol and 0.2 g of polyvinyl pyrrolidone were dispersed in 20 mL of aqueous solution, and the above solution was heated and stirred in a 70° C. water bath for 1 hour. After the polymer is completely dispersed and uniform, the solution is cooled. 1.0 mL of glacial acetic acid and 1.4 g of nickel chloride were added to the solution, and stirred for 12 hours to prepare an electrospinning solution. Place the thin film in a quartz boat with 0.1% H 2 Ar atmosphere, calcination at 500 ℃ for 1h. The prepared material is Sample A.

Embodiment 2

[0031] Disperse 1.0 g of polyvinylpyrrolidone, 0.2 g of polyvinyl alcohol and 0.2 g of polyacrylamide in 20 mL of aqueous solution, and heat and stir the above solution in a water bath at 80° C. for 1 hour. After the polymer is completely dispersed and uniform, the solution is cooled. 1.2 mL of glacial acetic acid and 1.4 g of nickel nitrate were added to the solution, and stirred for 12 hours to prepare an electrospinning solution. Place the film in a quartz boat with 0.1% H 2 Calcined at 600 °C for 3 h in an Ar atmosphere. The material prepared was Sample B.

Embodiment 3

[0033] Disperse 1.0 g of polyvinylpyrrolidone, 0.2 g of polyvinyl alcohol and 0.2 g of polyacrylamide in 20 mL of aqueous solution, and heat and stir the above solution in a 90° C. water bath for 1 hour. After the polymer is completely dispersed and uniform, the solution is cooled. 0.7 g of nickel nitrate, 0.7 g of nickel chloride and 1.5 mL of glacial acetic acid were added to the solution, and stirred for 12 hours to prepare an electrospinning solution. Place the thin film in a quartz boat with 0.1% H 2 N 2 Calcined at 700°C for 4h in atmosphere. The prepared material is Sample C.

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Abstract

The invention provides a doped carbon material catalyst as well as a preparation method and application thereof, and belongs to the fields of material preparation and electro-catalysis. The Ni-doped carbon material is prepared by an electrostatic spinning and a calcining method, and is prepared from at least the following raw materials: a nickel source, which is one or more of nickel acetate, nickel chloride and nickel nitrate; an organic additive, which is one or more of polyacrylamide, polyvinylpyrrolidone and polyvinyl alcohol; and glacial acetic acid. An H-type reactor is used for separating a cathode chamber from an anode chamber; two chambers are separated by a proton exchange membrane, the prepared Ni-doped carbon material catalyst is prepared into an electrode plate, the electrodeplate is filled in the cathode chamber, nitrite in water is electrochemically reduced into ammonia by the catalyst under a constant potential condition, and the catalyst has the advantages of normal temperature, normal pressure, no need of introducing H2 in the reaction process, and simple operation.

Description

technical field [0001] The invention relates to a preparation method of a doped carbon material catalyst for electrocatalytic reduction of nitrite and its application to the synthesis of ammonia by electrochemical reduction of nitrite, belonging to the fields of material preparation and electrocatalysis. Background technique [0002] The nitrogen cycle is an important process in ecosystems. First of all, nitrogen in the air can be used to synthesize ammonia through the Haber process, and ammonia is used to synthesize various fertilizers such as ammonium nitrate and urea to promote the production of important agricultural products. Secondly, ammonia is also used to synthesize various organic amine chemical raw materials that are widely used in the fields of pesticides, medicines, and dyes. Finally, ammonia or organic amines are decomposed by microorganisms (such as Thiobacillus denitrificans) and returned to the atmosphere in the form of nitrogen to complete the entire cycle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J21/18B01J37/34B01J37/08C25B1/00C25B11/06
CPCB01J23/755B01J21/18B01J37/342B01J37/0018C25B1/00C25B11/091B01J35/33
Inventor 沈丽娟邹婷梁诗景江莉龙刘福建曹彦宁
Owner FUZHOU UNIV
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