Preparation method of CoFe2O4/F-Ag2MoO4 composite material

A composite material, deionized water technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of poor catalyst stability, difficult catalyst catalysis reaction, etc., to achieve easy access, excellent electrocatalytic performance, and improved electrocatalytic performance. Effect

Inactive Publication Date: 2021-03-09
HANGZHOU XINKANG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these catalysts have poor stability under strong reducing conditions, and it is difficult to immobilize such catalysts on electrodes for efficient catalytic reactions.

Method used

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  • Preparation method of CoFe2O4/F-Ag2MoO4 composite material
  • Preparation method of CoFe2O4/F-Ag2MoO4 composite material
  • Preparation method of CoFe2O4/F-Ag2MoO4 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a CoFe 2 o 4 / F-Ag 2 MoO 4 The composite material specifically comprises the following preparation steps:

[0023] (1) Dissolve 4g of cobalt nitrate and 2g of ferric nitrate in deionized water. After the dissolution is complete, transfer it to a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 180°C for 24 hours. After the product is cooled, wash it with deionized water 3 times, dry at 60°C;

[0024] (2) Add 2mmol Na 2 MoO 4 2H 2 O dissolved in 100ml deionized water, 8mmolAgNO 3 Dissolve in 50ml of deionized water, then mix the two solutions, stir at 800r / min for 1h, then sonicate for 30min, then add 4mmol NaF and 4g of the product of step (1), and continue stirring for 1h;

[0025] (3) Transfer the solution of step (2) into a polytetrafluoroethylene reactor, conduct a hydrothermal reaction at 160°C for 24 hours, then centrifuge and wash at 8000rpm / min, and dry in vacuum to obtain CoFe 2 o 4 / F-Ag 2 MoO 4 composite material.

[0026] ...

Embodiment 2

[0037] a CoFe 2 o 4 / F-Ag 2 MoO 4 The composite material specifically comprises the following preparation steps:

[0038] (1) Dissolve 4g of cobalt nitrate and 1g of ferric nitrate in deionized water. After the dissolution is complete, transfer it to a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 150°C for 16 hours. After the product is cooled, wash it with deionized water 3 times, dry at 60°C;

[0039] (2) Add 2mmol Na 2 MoO 4 2H 2 O dissolved in 100ml deionized water, 4mmolAgNO 3 Dissolve in 50ml of deionized water, then mix the two solutions, stir at 800r / min for 1h, then sonicate for 30min, then add 2mmol NaF and 2g of the product of step (1), and continue stirring for 1h;

[0040] (3) Transfer the solution of step (2) into a polytetrafluoroethylene reactor, conduct a hydrothermal reaction at 140°C for 16 hours, then centrifuge and wash at 6000rpm / min, and dry in vacuum to obtain CoFe 2 o 4 / F-Ag 2 MoO 4 composite material.

[0041] ...

Embodiment 3

[0043] a CoFe 2 o 4 / F-Ag 2 MoO 4 The composite material specifically comprises the following preparation steps:

[0044] (1) Dissolve 4g of cobalt nitrate and 3g of ferric nitrate in deionized water. After the dissolution is complete, transfer it to a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 200°C for 32 hours. After the product is cooled, wash it with deionized water 3 times, dry at 60°C;

[0045] (2) Add 2mmol Na 2 MoO 4 2H 2 O dissolved in 100ml deionized water, 12mmol AgNO 3 Dissolve in 50ml of deionized water, then mix the two solutions, stir at 800r / min for 1h, then sonicate for 30min, then add 6mmolNaF and 6g of the product of step (1), and continue stirring for 1h;

[0046] (3) Transfer the solution of step (2) into a polytetrafluoroethylene reactor, conduct a hydrothermal reaction at 180°C for 32 hours, then centrifuge and wash at 10,000rpm / min, and dry in vacuum to obtain CoFe 2 o 4 / F-Ag 2 MoO 4 composite material.

[004...

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Abstract

The invention discloses a preparation method of a CoFe2O4/F-Ag2MoO4 composite material, wherein the preparation method comprises the following steps: carrying out hybrid reaction on silver nitrate andsodium molybdate, adding sodium bromide and sodium fluoride, and carrying out hydrothermal treatment to obtain the CoFe2O4/F-Ag2MoO4 composite material. The method is low in cost, simple to operate,efficient and energy-saving, and the obtained composite material is applied to an electrocatalytic nitrogen reduction catalyst.

Description

technical field [0001] The invention is applied to an electrocatalytic nitrogen reduction catalyst, in particular to a CoFe 2 o 4 / F-Ag 2 MoO 4 Methods of preparation of composite materials. Background technique [0002] Ammonia (NH 3 ) as an important chemical substance in the world's industrial production, is widely used in the production of pharmaceuticals, synthetic fibers, fertilizers, and energy conversion processes. However, the current industrial ammonia production mainly uses the traditional Haber–Bosch method to make nitrogen (N 2 ) reduced to NH 3 . The reaction process requires pure H 2 It will consume a large amount of fossil energy as a reactant and in a high temperature and high pressure environment. Therefore, it is an urgent task to find a cleaner and more efficient ammonia production method to replace the traditional Haber–Bosch method. [0003] Electrocatalytic nitrogen reduction can synthesize ammonia at normal temperature and pressure, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/27C25B11/091
CPCC25B1/00
Inventor 郭婷
Owner HANGZHOU XINKANG NEW MATERIAL CO LTD
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