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A kind of synthetic method of indium-based vanadium oxide catalyst and its application

A synthesis method and oxide technology, applied in the field of electrocatalysis, can solve the problems of high cost, easy deactivation of catalyst, complex synthesis process, etc., and achieve the effect of short reaction time, simple equipment and good repeatability

Active Publication Date: 2022-07-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a synthesis method of an indium-based vanadium oxide catalyst and its application in order to solve the problems of high material cost, complex synthesis process and easy deactivation of the catalyst in the existing electrocatalytic synthesis of ammonia.

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  • A kind of synthetic method of indium-based vanadium oxide catalyst and its application
  • A kind of synthetic method of indium-based vanadium oxide catalyst and its application
  • A kind of synthetic method of indium-based vanadium oxide catalyst and its application

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specific Embodiment approach 1

[0017] Embodiment 1: This embodiment describes a method for synthesizing an indium-based vanadium oxide catalyst, and the method steps are as follows:

[0018] Step 1: adding indium nitrate into a three-necked flask containing a mixed solvent of oleic acid, oleylamine and octadecene, degassing in an inert atmosphere, and stirring the reaction at a temperature of 140°C-190°C;

[0019] Step 2: Dissolve sodium metavanadate in a mixed solution of nitric acid and water, after stirring and dissolving, drop the solution into the three-necked flask of step 1 dropwise, under the protection of an inert atmosphere, condense and reflux at 140°C-190°C React 30-40min, naturally cool to room temperature;

[0020] Step 3: Add the mixture of n-hexane and absolute ethanol for washing, the solution is layered up and down, the upper layer is washed with the mixture of n-hexane and absolute ethanol for 3-5 times, centrifuged, and finally dried in vacuum.

[0021] During the heating process, octad...

specific Embodiment approach 2

[0022] Embodiment 2: In the method for synthesizing an indium-based vanadium oxide catalyst described in Embodiment 1, in step 1, the volume ratio of oleic acid, oleylamine and octadecene is 1:1:10.

specific Embodiment approach 3

[0023] Embodiment 3: In the method for synthesizing an indium-based vanadium oxide catalyst described in Embodiment 1, in step 2, the volume ratio of the nitric acid to water is 1:5.

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Abstract

A synthesis method and application of an indium-based vanadium oxide catalyst belong to the technical field of electrocatalysis. In order to solve the problems of high material cost, complex synthesis process and easy deactivation of catalysts in the existing electrocatalytic ammonia synthesis, the method is as follows: adding indium nitrate to a mixed solvent containing oleic acid, oleylamine and octadecene. In a three-neck flask, degas under an inert atmosphere, and stir the reaction at a temperature of 140-190°C; dissolve sodium metavanadate in a mixed solution of nitric acid and water, stir and dissolve, and drop the solution into the three-neck flask , under the protection of an inert atmosphere, 140 ℃-190 ℃ condensation reflux reaction for 30-40min, naturally cooled to room temperature; add a mixture of n-hexane and anhydrous ethanol for washing, layering, the upper layer continues to be mixed with n-hexane and anhydrous ethanol The solution was washed, centrifuged, and dried in vacuo. The synthesis method of the invention is simple in operation, simple in equipment, short in reaction time and good in repeatability, and the electrocatalysts with two shapes have good electrocatalytic ammonia synthesis performance and very good stability.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a synthesis method and application of an indium-based vanadium oxide catalyst. Background technique [0002] Ammonia is an important inorganic chemical product, and the synthetic ammonia industry is of great significance to human production and life. Nitrogen and H are currently fixed in industry by the Haber-Bosch method. 2 The reaction takes place to synthesize ammonia. This process needs to be carried out under strict high temperature and high pressure conditions. due to H 2 It comes from the reforming of natural gas, so it requires huge energy consumption and produces a large amount of greenhouse gas CO 2 , causing serious environmental pollution and exacerbating global warming. [0003] Due to the mild reaction conditions, electrocatalytic ammonia synthesis can be carried out at normal temperature and pressure, and is expected to replace the traditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22B01J35/00C25B1/27C25B11/091
CPCB01J23/22C25B1/00C25B11/091B01J35/33
Inventor 韩晓军李佳栋
Owner HARBIN INST OF TECH