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Preparation method and application of carbon loaded bismuth nanoparticle catalyst

A particle catalyst and bismuth nanotechnology, which is applied in the preparation and application of carbon dioxide electrochemical reduction catalysts, can solve problems such as rare research reports, and achieve the effects of simple preparation method, convenient operation, and improved electrochemical surface area.

Active Publication Date: 2018-11-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, carbon-supported bismuth nanoparticles catalysts in CO 2 Research reports on electrochemical conversion are very rare

Method used

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  • Preparation method and application of carbon loaded bismuth nanoparticle catalyst
  • Preparation method and application of carbon loaded bismuth nanoparticle catalyst
  • Preparation method and application of carbon loaded bismuth nanoparticle catalyst

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Embodiment 1

[0026] This embodiment provides a carbon-supported bismuth nanoparticle catalyst, which is synthesized by an aqueous solution chemical reduction method, and its raw materials include carbon materials and metal elemental Bi. The metal elemental Bi is nanoparticles with a particle diameter of 2-5 nm; the Bi nanoparticles are loaded on the carbon material.

[0027] The preparation method of the carbon-supported bismuth nanoparticle catalyst is as follows: Weigh 2.5 mmol of bismuth nitrate pentahydrate and add it to a beaker, add 10 mL of deionized water and 0.5 mL of concentrated nitric acid, and stir magnetically for 2 hours to obtain a 0.25 M bismuth nitrate solution; Take 2mL of 0.25M bismuth nitrate solution and dissolve it in 200mL deionized water, add 4mM trisodium citrate, stir for 30min to obtain a catalyst precursor solution, add 0.1g of -COOH functionalized multi-walled carbon nanotubes, stir for 30min, After ultrasonication for 30 min, 60 mL of 0.1 M sodium borohydride...

Embodiment 2

[0032] This embodiment provides a carbon-supported bismuth nanoparticle catalyst, which is synthesized by an aqueous solution chemical reduction method, and its raw materials include carbon materials and metal elemental Bi. The metal elemental Bi is nanoparticles with a particle diameter of 2-5 nm; the Bi nanoparticles are loaded on the carbon material.

[0033]The preparation method of the carbon-supported bismuth nanoparticle catalyst is as follows: Weigh 2.5 mmol of bismuth nitrate pentahydrate and add it to a beaker, add 10 mL of deionized water and 0.5 mL of concentrated nitric acid, and stir magnetically for 2 hours to obtain a 0.25 M bismuth nitrate solution; Take 2mL of 0.25M bismuth nitrate solution and dissolve it in 200mL deionized water, add 4mM trisodium citrate, stir for 30min to obtain a catalyst precursor solution, add 0.1g of graphene, stir for 30min, after ultrasonication for 30min, add dropwise 60mL of 0.1 M's sodium borohydride reduction solution was stirre...

Embodiment 3

[0038] This embodiment provides a carbon-supported bismuth nanoparticle catalyst, which is synthesized by an aqueous solution chemical reduction method, and its raw materials include carbon materials and metal elemental Bi. The metal elemental Bi is nanoparticles with a particle diameter of 2-5 nm; the Bi nanoparticles are loaded on the carbon material.

[0039] The preparation method of the carbon-supported bismuth nanoparticle catalyst is as follows: Weigh 2.5 mmol of bismuth nitrate pentahydrate and add it to a beaker, add 10 mL of deionized water and 0.5 mL of concentrated nitric acid, and stir magnetically for 2 hours to obtain a 0.25 M bismuth nitrate solution; Dissolve 2mL of 0.25M bismuth nitrate solution in 200mL of deionized water, add 2mM trisodium citrate, and stir for 30min to obtain a catalyst precursor solution, add 0.1g of -COOH functionalized multi-walled carbon nanotubes, and stir for 30min , after ultrasonication for 30min, 60mL of 0.1M sodium borohydride re...

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Abstract

The invention discloses a preparation method of a carbon loaded bismuth nanoparticle catalyst, and application of the prepared carbon loaded bismuth nanoparticle catalyst to a CO2 electrochemical reduction catalyst. The preparation method uses a water solution chemical reduction method for synthesis. The carbon loaded bismuth nanoparticle catalyst is prepared by the simple water solution chemicalreduction method; by effectively regulating and controlling the addition quantity of a stabilizing agent and the carbon material variety, metal Bi particles of a nanometer structure are obtained; relatively good dispersibility is realized; in the CO2 reduction process, the selectivity on formate is high; the current density can be improved; the electrochemical surface area of the catalyst can be greatly improved; the exposure of CO2 reduction active sites is improved; the electron mass transfer resistance is reduced; the current density of CO2 reduction is increased; the utilization rate and the conversion rate of CO2 are effectively improved; the preparation method is simple; the yield is great; the preparation method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of preparation and application of carbon dioxide electrochemical reduction catalysts, in particular to the preparation of a highly efficient carbon-loaded Bi nanoparticle and its application in carbon dioxide electrochemical reduction. Background technique [0002] With the rapid development of industry, the exploitation and use of a large number of fossil fuels such as coal and oil have produced a worldwide energy crisis on the one hand, and emitted a large amount of CO2 on the other hand. 2 gases that cause the greenhouse effect. Reduce CO 2 Emissions and the search for clean new energy have become the focus of global attention today. CO 2 As an abundant, cheap, and potential source of Cl, it can be converted into carbon-based fuels or chemicals by chemical methods, photocatalysis, and electrocatalysis [Dalton Trans., 39, 3347-3357 (2010)]. However, CO 2 It is a gas with very stable chemical properties. Its mol...

Claims

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Application Information

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IPC IPC(8): B01J23/18C25B3/04C25B11/06C25B3/25
CPCC25B11/04B01J23/18C25B3/25
Inventor 乔锦丽张霞蔡一啸王敏徐能能刘俊宇彭芦苇周玥
Owner DONGHUA UNIV
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