A method for preparing cos electrocatalyst using ultrasonic spray technology

A technology of ultrasonic spraying and electrocatalyst, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of difficult large-scale production and preparation of CoS electrocatalysts, complex preparation process, etc., and achieve the realization of preparation The effect of collecting, improving catalytic activity, and low price

Active Publication Date: 2021-01-19
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the technical problems that the existing methods for preparing CoS electrocatalysts have complicated preparation process, and it is difficult to realize large-scale production and preparation of efficient CoS electrocatalysts, and proposes a method for large-scale preparation of efficient CoS electrocatalysts based on ultrasonic spray technology , the method has the advantages of simple, fast, easy operation and implementation, cost saving, and large-scale preparation.

Method used

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  • A method for preparing cos electrocatalyst using ultrasonic spray technology
  • A method for preparing cos electrocatalyst using ultrasonic spray technology
  • A method for preparing cos electrocatalyst using ultrasonic spray technology

Examples

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Embodiment 1

[0026] A method for preparing a CoS electrocatalyst using ultrasonic spray technology, the specific implementation steps are as follows:

[0027] Step 1: Prepare a spray solution with a concentration of 0.01mol / L: the sulfur source and the cobalt source are respectively selected from thiourea and cobalt chloride hexahydrate powder, the molecular weights are 76.12 and 237.93 respectively; the solvent used is ultrapure water. Considering that sulfur loss is likely to occur during the high-temperature spraying process, an excess sulfur source was added in the process of preparing the spray solution in the embodiment of the present invention, and the molar ratio of the sulfur source to the cobalt source was 3:1.

specific Embodiment approach

[0028] The specific implementation method is as follows: measure 1000ml of ultrapure water and place it in a beaker, weigh 2.28g of thiourea and add it to the beaker in turn, stir until the thiourea is completely dissolved in the ultrapure water, and the solution is clear and transparent, then weigh 2.38g Add the cobalt chloride hexahydrate powder into the beaker and continue to stir until the cobalt chloride hexahydrate powder is completely dissolved. So far, the preparation of the solution required for spraying in the present invention is completed.

[0029] Step 2: Add the spray solution obtained in step 1 into the ultrasonic spray device, set the current and voltage parameters of the ultrasonic spray device, the temperature rise program, run the temperature rise program, and collect the CoS electrocatalyst powder.

[0030] The specific implementation is as follows: the current of the ultrasonic spray device is set to 0.2μA, the voltage is 12KV, the heating rate is set to 10...

Embodiment 2

[0038] A method utilizing ultrasonic spray technology to prepare CoS electrocatalysts, its step 3 is the same as in Example 1, except that:

[0039] Step 1: Prepare a spray solution with a concentration of 0.02mol / L: the sulfur source and the cobalt source are respectively selected from thiourea and cobalt chloride hexahydrate powder, the molecular weights are 76.12 and 237.93 respectively; the solvent used is ultrapure water. Considering that sulfur loss is likely to occur during the high-temperature spraying process, an excess sulfur source was added in the process of preparing the spray solution in the embodiment of the present invention, and the molar ratio of the sulfur source to the cobalt source was 4:1.

[0040] The specific implementation method is as follows: measure 1000ml of ultrapure water and place it in a beaker, weigh 6.08g of thiourea and add it to the beaker successively, stir until the thiourea is completely dissolved in the ultrapure water, and the solution ...

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Abstract

The invention discloses a method for preparing a CoS electrocatalyst by using an ultrasonic spraying technology, and belongs to the technical field of electrocatalysts. In the prior art, the existingCoS electrocatalyst preparation process is complex, and the large-scale production of the efficient CoS electrocatalyst is not easily achieved. Based on the technical problems in the prior art, the invention provides the method for large-scale preparation of the efficient CoS electrocatalyst based on the ultrasonic spraying technology, wherein the method comprises: mixing a sulfur source and a cobalt source to preparing a spraying solution, preparing CoS electrocatalyst powder by using an ultrasonic spraying device, and purifying the CoS electrocatalyst powder. According to the present invention, the method has advantages of simple and quick operation, easy performing, cost saving, large-scale preparation and the like.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, and in particular relates to a method for preparing CoS electrocatalysts by using ultrasonic spray technology. Background technique [0002] Electrocatalysts play an extremely important role in many fields. At present, most of the ideal electrocatalytic materials widely used are platinum (Pt)-based noble metal electrocatalysts. However, due to their high price and limited available resources, it is extremely difficult to The large-scale production and application of it in industry are limited by the earth, so it is imperative to prepare non-precious metal electrocatalysts with relatively low price and high catalytic performance. [0003] In the search for alternative Pt-based noble metal electrocatalytic materials, binary CoS has become a widely researched material due to its advantages of low price, abundant raw material resources, non-toxicity, and easy preparation. At present, there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/043B01J37/34B01J37/00
CPCB01J27/043B01J35/0033B01J37/00B01J37/343
Inventor 张昕彤王莹琳杨焕英芦爽
Owner NORTHEAST NORMAL UNIVERSITY
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