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High-dispersion metal nanoparticle/biomass carbon composite electrode material as well as preparation method and application thereof

A metal nanoparticle, biomass carbon technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, electrode, etc., can solve the problem that nano metal particles are easy to agglomerate, affect performance, and have high surface energy. problems, to achieve the effect of improving catalytic performance, low price, and mild reaction conditions

Active Publication Date: 2020-06-30
LINYI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small size and high surface energy of nano-metal particles, when prepared by conventional preparation methods, the prepared nano-metal particles are very easy to agglomerate, which affects the performance of the product.

Method used

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  • High-dispersion metal nanoparticle/biomass carbon composite electrode material as well as preparation method and application thereof
  • High-dispersion metal nanoparticle/biomass carbon composite electrode material as well as preparation method and application thereof
  • High-dispersion metal nanoparticle/biomass carbon composite electrode material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Soak the loofah with 1.0 mol / L sodium hydroxide solution, wash it with deionized water after standing for 24 hours until the solution is neutral, and remove impurities on the surface of the loofah. Place in an oven, dry at 45°C for 12 hours, and set aside. The appearance of the loofah after alkali washing treatment obtained by scanning electron microscope is as follows: figure 1 shown. The blank loofah presents a three-dimensional cross-linked porous structure. Weigh 2g of processed loofah and put it into a beaker, add 30mL of 0.1mol / L CoCl in turn 2 , 30 mL of 0.2 mol / L dimethylimidazole solution, stirred evenly, and reacted at room temperature for 6 hours. After the reaction is finished, the loofah is washed with ultrapure water, put into a vacuum drying oven, and dried at 45° C. for 12 hours.

[0032] Put the dried loofah in a porcelain boat and place it in a high-temperature tube furnace, with high-purity nitrogen as the protective gas, and the gas velocity is c...

Embodiment 2

[0035]Soak the loofah with 0.8mol / L sodium hydroxide solution, wash it with deionized water after standing for 24 hours until the solution is neutral, and remove impurities on the surface of the loofah. Place in an oven, dry at 45°C for 12 hours, and set aside.

[0036] The blank loofah presents a three-dimensional cross-linked porous structure. Weigh 2g of processed loofah and put it into a beaker, add 30mL of 0.12mol / L CoCl 2 , 30mL of 0.25mol / L dimethylimidazole solution, stirred evenly, and reacted at room temperature for 10 hours. After the reaction is finished, the loofah is washed with ultrapure water, put into a vacuum drying oven, and dried at 45° C. for 12 hours.

[0037] Put the dried loofah in a porcelain boat and place it in a high-temperature tube furnace, with high-purity nitrogen as the protective gas, and the gas velocity is controlled at 25ml / min. The heating rate is 1° C. / min, the calcination temperature is 600° C., and the calcination time is 60 minutes....

Embodiment 3

[0039] Soak the loofah with 0.8mol / L sodium hydroxide solution, wash it with deionized water after standing for 24 hours until the solution is neutral, and remove impurities on the surface of the loofah. Place in an oven, dry at 45°C for 12 hours, and set aside. The blank loofah presents a three-dimensional cross-linked porous structure. Weigh 2g of processed loofah and put it into a beaker, add 30mL of 0.08mol / L CoCl in turn 2 , 30mL of 0.15mol / L dimethylimidazole solution, stirred evenly, and reacted at room temperature for 12 hours. After the reaction is finished, the loofah is washed with ultrapure water, put into a vacuum drying oven, and dried at 45° C. for 12 hours.

[0040] Put the dried loofah in a porcelain boat and place it in a high-temperature tube furnace, with high-purity nitrogen as the protective gas, and the gas velocity is controlled at 25ml / min. The heating rate is 1° C. / min, the calcination temperature is 600° C., and the calcination time is 60 minutes....

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Abstract

The invention discloses a high-dispersion metal nanoparticle / biomass carbon composite electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: cleaning loofah sponge, soaking the loofah sponge in an alkali liquor, and drying the loofah sponge for later use; cutting the loofah sponge into pieces, adding a cobalt salt solutionand a dimethylimidazole solution into the loofah sponge, carrying out standing reaction, carrying out in-situ growth of a ZIF-67 compound on the surface of the loofah sponge, and drying; and subjecting the loofah sponge-ZIF-67 compound to heating and calcining at a constant speed under the protection of inert gas to prepare the high-dispersion metal nanoparticle / carbon composite material. The prepared ultrathin carbon layer coated metal nano composite material has the advantages of uniform dispersion of metal particles and good chemical stability. The catalyst is suitable for an electro-catalytic oxygen production system, and shows excellent catalytic activity.

Description

technical field [0001] The invention relates to the field of synthesis of carbon-based composite materials, in particular to a highly dispersed metal nanoparticle / biomass carbon composite electrode material and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] In response to the increasingly serious global climate change and energy crisis, people have been looking for new energy sources that can replace conventional energy sources such as coal and oil. Hydrogen is widely considered as the most potential alternative energy due to its advantages of high energy density and no pollution to the environment. Water-splitting technology is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J35/00B01J35/10B01J37/08C25B1/04C25B11/06
CPCB01J37/084B01J37/086B01J23/75C25B1/04C25B11/091B01J35/394B01J35/393B01J35/33B01J35/60Y02E60/36
Inventor 张红秀徐平张敬硕
Owner LINYI UNIVERSITY
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