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Preparation method of cobalt-doped rhenium disulfide nanosheet array for electro-catalytic hydrogen evolution

A nanosheet array and rhenium disulfide technology, applied in the field of electrocatalysis, can solve the problems of difficult directional growth of rhenium disulfide nanosheets, reduced electrocatalytic hydrogen evolution reaction activity, and high potential energy consumption, so as to improve the performance of electrocatalytic hydrogen evolution, Improve the hydrogen evolution reaction activity and enhance the effect of electrocatalytic activity

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

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Problems solved by technology

At present, the electrode materials used for electrolysis of water have disadvantages such as high price, small specific surface area, and low electrocatalytic activity, which lead to high potential and high energy consumption, which seriously restricts the development of hydrogen production technology by electrolysis of water. Therefore, it is urgent to develop efficient hydrogen production. Inexpensive materials to solve this problem
[0003] Rhenium disulfide (ReS 2 ) is a two-dimensional (2D) group VII transition metal dichalcogenide (TMD) edge with a large number of active sites, which, like group VI isotropic TMD materials, shows high performance in energy conversion and storage devices The potential of the catalyst, but the rhenium disulfide nanosheets prepared by the common preparation method are difficult to grow directionally and easy to agglomerate, resulting in a greatly reduced electrocatalytic hydrogen evolution reaction activity

Method used

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  • Preparation method of cobalt-doped rhenium disulfide nanosheet array for electro-catalytic hydrogen evolution
  • Preparation method of cobalt-doped rhenium disulfide nanosheet array for electro-catalytic hydrogen evolution
  • Preparation method of cobalt-doped rhenium disulfide nanosheet array for electro-catalytic hydrogen evolution

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Experimental program
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Effect test

Embodiment 1

[0020] Weigh 0.291g of 2-methylimidazole dissolved in 40ml of water and stir for 10min to form A solution, weigh 1.3136g of cobalt nitrate hexahydrate dissolved in 40ml of water and stir for 10min to form B solution, then quickly add A solution into B solution and stir for 30min A mixed C solution was obtained. Put a piece of nitric acid treated carbon cloth (WOS109 type, 1*1.5*0.036cm 3 ) into the C solution. After reacting for 4 hours, samples were taken, washed repeatedly with deionized water, and then grown in the same solution for another 4 hours. Finally, the sample was washed with deionized water, dried under vacuum at 60°C overnight, and a layer of purple sample (ZIF-67 / CC) was loaded on black carbon cloth.

[0021] Weigh 0.5g of cobalt nitrate hexahydrate and dissolve it in 40ml of a mixed solution of ultrapure water and ethanol with a volume ratio of 1:9, put the previously prepared ZIF-67 / CC into it, stir at room temperature for 30min, and take out the sample , w...

Embodiment 2

[0024] Weigh 0.407g of 2-methylimidazole dissolved in 40ml of water and stir for 10min to form A solution, weigh 1.3136g of cobalt nitrate hexahydrate dissolved in 40ml of water and stir for 10min to form B solution, then quickly add A solution into B solution and stir for 30min A mixed C solution was obtained. Put a piece of nitric acid treated carbon cloth (WOS109 type, 1*1.5*0.036cm 3 ) into the C solution. After reacting for 4 hours, samples were taken, washed repeatedly with deionized water, and then grown in the same solution for another 4 hours. Finally, the sample was washed with deionized water, dried under vacuum at 60°C overnight, and a layer of purple sample (ZIF-67 / CC) was loaded on black carbon cloth.

[0025] Weigh 0.5g of cobalt nitrate hexahydrate and dissolve it in 40ml of a mixed solution of ultrapure water and ethanol with a volume ratio of 1:9, put the previously prepared ZIF-67 / CC into it, stir at room temperature for 30min, and take out the sample , w...

Embodiment 3

[0028] Weigh 0.52g of 2-methylimidazole dissolved in 40ml of water and stir for 10min to form A solution, weigh 1.3g of cobalt nitrate hexahydrate dissolved in 40ml of water and stir for 10min to form B solution, then quickly add A solution into B solution and stir for 30min A mixed C solution was obtained. Put a piece of nitric acid treated carbon cloth (WOS109 type, 1*1.5*0.036cm 3 ) into the C solution. After reacting for 4 hours, samples were taken, washed repeatedly with deionized water, and then grown in the same solution for another 4 hours. Finally, the sample was washed with deionized water, dried under vacuum at 60°C overnight, and a layer of purple sample (ZIF-67 / CC) was loaded on black carbon cloth.

[0029] Weigh 0.5g of cobalt nitrate hexahydrate and dissolve it in 40ml of a mixed solution of ultrapure water and ethanol with a volume ratio of 1:9, put the previously prepared ZIF-67 / CC into it, stir at room temperature for 30min, and take out the sample , washe...

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Abstract

The invention relates to a preparation method of a cobalt-doped rhenium disulfide nanosheet array for electro-catalytic hydrogen evolution. The preparation method comprises the following steps: addingan aqueous 2-methylimidazole solution into an aqueous solution of cobalt nitrate hexahydrate, and immersing a piece of acid-treated carbon cloth into the formed mixed solution; after a reaction for aperiod of time, taking a sample, and cleaning the sample with deionized water; carrying out growing in the same solution for a period of time so as to obtain a ZIF-67 nanoarray sample which is namedas ZIF-67 / CC; cleaning and drying the sample; dissolving the cobalt nitrate hexahydrate into a mixed solution of ultrapure water and ethanol, and putting the prepared ZIF-67 / CC into the mixed solutionfor hydrolysis to obtain the product cobalt hydroxide nanoarray Co(OH)2 / CC; and preparing the product Co-ReS2 / CC. The Co-ReS2 / CC prepared by using the preparation method disclosed by the invention isapplied to an HER electrocatalyst.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a method for preparing rhenium disulfide nanosheets modified by supporting cobalt hydroxide nanoarrays on carbon cloth. Background technique [0002] In order to solve the increasing energy demand and environmental pressure in the process of human development, electrocatalytic hydrogen production technology has attracted the attention of scientific researchers because of its clean, cheap and sustainable advantages. At present, the electrode materials used for electrolysis of water have disadvantages such as high price, small specific surface area, and low electrocatalytic activity, which lead to high potential and high energy consumption, which seriously restricts the development of hydrogen production technology by electrolysis of water. Therefore, it is urgent to develop efficient hydrogen production. And cheap materials to solve this problem. [0003] Rhe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B82Y30/00B82Y40/00C25B11/06C25B1/04
CPCB01J27/043B01J37/0018B82Y30/00B82Y40/00C25B1/04C25B11/091B01J35/33Y02E60/36
Inventor 何芳孙巧稚赵乃勤师春生何春年刘恩佐马丽颖沙军威
Owner TIANJIN UNIV
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