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A kind of cobaltous oxide for catalyst and its preparation method and application

A cobaltous oxide and catalyst technology, applied in chemical instruments and methods, cobalt oxide/cobalt hydroxide, physical/chemical process catalysts, etc., can solve the problems of difficult control of product microstructure, limited application, complicated preparation process, etc., to achieve Easy to achieve industrial production, high catalytic activity and stability, and simple preparation process

Inactive Publication Date: 2019-12-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Prepare cobaltous oxide nanoparticles or nanosheets in aqueous solution or common organic solvents. This conventional method is often difficult to effectively control the microstructure of cobaltous oxide
[0005] 2. Combining cobaltous oxide with a substrate material with good conductivity to obtain higher catalytic performance, but this preparation method is often complicated and difficult to control
[0007] These preparation methods are faced with problems such as difficult to control the microstructure of the product, complicated preparation process, and high preparation cost, which greatly limit their commercial application.

Method used

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  • A kind of cobaltous oxide for catalyst and its preparation method and application
  • A kind of cobaltous oxide for catalyst and its preparation method and application
  • A kind of cobaltous oxide for catalyst and its preparation method and application

Examples

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Effect test

Embodiment 1

[0045] Prepare cobaltous oxide in pure ionic liquid, its specific steps are as follows:

[0046]50mg cobalt acetylacetonate and 1g ionic liquid (1-butyl-3-methylimidazole bistrifluoromethanesulfonimide salt) are added in a 10ml glass bottle, then the glass bottle is placed in a tube furnace, After feeding nitrogen for 20 minutes, turn on the tube furnace for program-controlled temperature rise, so that the temperature in the tube furnace is raised from room temperature to 280 °C at a rate of 5 °C / min, and then keep the temperature at this temperature for 5 hours, and then let the tube furnace cool down naturally to room temperature. The black precipitate in the glass bottle was recovered by centrifugation, washed with ethanol and then dried in a vacuum oven to obtain the cobaltous oxide catalyst, which was designated as CoO-280-5.

[0047] The XRD result of the cobaltous oxide prepared in this embodiment is as follows figure 1 As shown, it can be drawn from the diffraction p...

Embodiment 2

[0049] 50mg cobalt acetylacetonate and 1g ionic liquid (1-butyl-3-methylimidazole bistrifluoromethanesulfonimide salt) are added in a 10ml glass bottle, then the glass bottle is placed in a tube furnace, After feeding nitrogen for 20 minutes, turn on the tube furnace for program-controlled temperature rise, so that the temperature in the tube furnace is raised from room temperature to 280 °C at a rate of 5 °C / min, and then keep the temperature at this temperature for 1 hour, and then let the tube furnace cool down naturally to room temperature. Then reclaim the black precipitate in the glass bottle by centrifugation, wash it with ethanol and dry it in a vacuum oven. The transmission electron microscope image of its product is as follows: image 3 As shown in A.

Embodiment 3

[0051] 50mg cobalt acetylacetonate and 1g ionic liquid (1-butyl-3-methylimidazole bistrifluoromethanesulfonimide salt) are added in a 10ml glass bottle, then the glass bottle is placed in a tube furnace, After feeding nitrogen for 20 minutes, turn on the tube furnace for program-controlled temperature rise, so that the temperature in the tube furnace is raised from room temperature to 280 °C at a rate of 5 °C / min, and then keep the temperature at this temperature for 2 hours, and then let the tube furnace cool down naturally to room temperature, then reclaim the black precipitate in the glass bottle by centrifugation, wash with ethanol and then dry in a vacuum oven. The transmission electron microscope image of the product is as follows: image 3 Shown in B.

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Abstract

The invention discloses cobalt oxide for catalysts and its preparation method and application. Its preparation method is: using cobalt acetylacetonate as the cobalt source, using ionic liquid as the solvent, the ionic liquid is 1-butyl-3-methylimidazole bistrifluoromethanesulfonimide salt, in an inert gas atmosphere The precipitate prepared by reaction using ionothermal method is cobaltous oxide for catalyst. The cobaltous oxide prepared by the present invention has an ultra-thin sheet structure, which can expose more catalytically active sites, and therefore has high electrocatalytic activity for oxygen evolution reaction. The preparation process is simple and is suitable for industrial production. The field of reaction electrocatalysts has potential practical application value.

Description

technical field [0001] The invention belongs to the technical field of nano-catalytic materials, and relates to a cobaltous oxide for catalysts and its preparation method and application, in particular to cobaltous oxide synthesized in pure ionic liquid, especially a method for synthesizing cobaltous oxide in pure ionic liquid . Background technique [0002] The environmental pollution caused by the extensive use of fossil fuels and the energy crisis caused by the shortage of fossil fuels make the development of new energy extremely urgent. The technology of water splitting to generate hydrogen and oxygen can provide clean, efficient and sustainable hydrogen energy for social development, and is considered to be the most promising new energy technology. The water-splitting reaction consists of two half-reactions, the hydrogen evolution reaction and the oxygen evolution reaction, and the oxygen evolution reaction mainly limits the efficiency of water splitting. To achieve l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01J35/02C01G51/04C25B1/04B01J35/00
CPCC25B1/04C01G51/04B01J23/75C01P2004/20C01P2002/72C01P2002/01B01J35/33B01J35/00B01J35/30Y02E60/36Y02P20/54
Inventor 李钟号姜安宁张宝花
Owner SHANDONG UNIV
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