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Bismuth-based nanoparticle catalyst as well as preparation method and application thereof

A nanoparticle and catalyst technology, applied in the field of bismuth-based nanoparticle catalyst and its preparation, can solve problems such as direct utilization, complex components of reduction products, fracture, etc., and achieve the effects of mild conditions, good stability, and simple procedures

Pending Publication Date: 2022-07-22
电子科技大学长三角研究院(湖州)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reported electrocatalytic carbon dioxide electrocatalytic reduction system not only has side reactions such as hydrogen evolution, but also involves problems such as C-O bond breakage, C-H, C-C bond formation, etc., resulting in too complex components of the reduction product (including formic acid, carbon monoxide, ethylene, ethanol, etc.), making it difficult to use directly in practical applications

Method used

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  • Bismuth-based nanoparticle catalyst as well as preparation method and application thereof
  • Bismuth-based nanoparticle catalyst as well as preparation method and application thereof
  • Bismuth-based nanoparticle catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0050] (1). Preparation of bismuth metal-phenolic mesogen precursor:

[0051] Put 78.6 mg of ellagic acid and 205 mg of bismuth nitrate in a 30-ml clean glass bottle at room temperature, then slowly add 25 ml of N, methylpyrrolidone to the glass bottle, transfer the glass bottle to a dark environment, at room temperature ageing for 7 days. After the aging, the supernatant was removed, the obtained solid product was centrifuged at 10,000 rpm for 10 minutes, the excess supernatant was removed, and the sediment at the bottom was collected. After washing with 50 ml of N, methylpyrrolidone once, centrifugal collection, and finally washing with 50 ml of ethanol twice, then centrifugal collection, and vacuum drying treatment, the vacuum drying temperature is 50 ° C, and the vacuum drying time is 12 hours.

[0052](2) Electrochemical in situ formation of bismuth nanoparticles

[0053] At room temperature, 12 mg of bismuth metal-phenolic mesogen precursor was mixed with 10 μl of perf...

Embodiment 2

[0058] Catalytic performance testing of bismuth-based nanoparticle catalysts.

[0059] A bismuth-based nanoparticle catalyst prepared in Example 1 of the present invention was used to test the catalytic performance of the electroreduction reaction of carbon dioxide.

[0060] The bismuth carbon gas diffusion layer loaded with the bismuth-based nanoparticle catalyst obtained in Example 1 of the present invention was used as the working electrode, the nickel foam was used as the counter electrode, and the silver / silver chloride electrode was used as the reference electrode. Potassium solution was used as catholyte, and 1 mole per liter of potassium hydroxide solution was used as anolyte, and the carbon dioxide electroreduction performance test was carried out in a flow electrolytic cell. The carbon dioxide flow rate was maintained at 50 sccm and the electrolyte flow rate was maintained at 60 ml per minute during the test. The test adopts the constant current method, and the appl...

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Abstract

The invention provides a bismuth-based nano-particle catalyst as well as a preparation method and application thereof. The bismuth-based nano-particle catalyst comprises ellagic acid and N, methyl pyrrolidone molecules and bismuth nano-particles which are mutually independent and uniformly distributed around the two molecules. The bismuth-based nano-particle catalyst disclosed by the invention has a specific structure and morphology, salt containing bismuth metal is mixed with ellagic acid and N, methyl pyrrolidone, the three materials are self-assembled into hierarchical metal-phenolic mesocrystal with an ordered quaternary structure, and the bismuth-based nano-particle catalyst is obtained after electrochemical in-situ reduction; the invention also discloses a preparation method of the bismuth nanoparticle-based catalyst and application of the catalyst in carbon dioxide electroreduction reaction, under the action of the bismuth nanoparticles, single selective electrocatalytic reduction from carbon dioxide to formic acid is realized, and the bismuth nanoparticle-based catalyst is expected to be applied to efficient conversion of carbon dioxide gas.

Description

technical field [0001] The invention belongs to the technical field of metal nano-catalysts, and in particular relates to a bismuth-based nano-particle catalyst and a preparation method and application thereof. Background technique [0002] In recent years, with the increasing problems of environmental pollution and energy crisis, the use of electrocatalytic carbon dioxide reduction to prepare carbon-related products has received extensive attention. However, the reported electrocatalytic carbon dioxide electrocatalytic reduction system not only has side reactions such as hydrogen evolution, but also involves C-O bond cleavage, C-H, C-C bond generation and other problems, resulting in excessively complex components of the reduction product (including formic acid, carbon monoxide, ethylene, ethanol, etc.), making it difficult to directly utilize it in practical applications. [0003] Therefore, the preparation of electrocatalytic carbon dioxide reduction materials with high ...

Claims

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Application Information

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IPC IPC(8): C25B11/065C25B11/095C25B3/07C25B3/26
CPCC25B11/065C25B11/095C25B3/07C25B3/26
Inventor 夏川郑婷婷李成博
Owner 电子科技大学长三角研究院(湖州)
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