Preparation method and application of ultra-thin multi-metal nanosheet piling assembly material

A multi-metal, nano-sheet technology, applied in the field of electrocatalysis, can solve the problems of inconvenient material recovery and reuse, and decreased material stability.

Active Publication Date: 2019-04-12
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high dispersion of ultrathin two-dimensional nanostructures often leads to a decrease in the stability of the material, which also brings great inconvenience to the recycling and reuse of materials.

Method used

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  • Preparation method and application of ultra-thin multi-metal nanosheet piling assembly material
  • Preparation method and application of ultra-thin multi-metal nanosheet piling assembly material
  • Preparation method and application of ultra-thin multi-metal nanosheet piling assembly material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 100mg of cetyltrimethylammonium chloride, 100mg of polyvinylpyrrolidone, 8mg of palladium acetylacetonate, 10mg of platinum acetylacetonate, and 3-13mg of trichloride into a 25mL polytetrafluoroethylene reactor liner. Ruthenium, 1.35-8.1mg of ferric chloride, 50mg of tungsten hexacarbonyl and 12mL of absolute ethanol. Stir at room temperature at a speed of 600rpm for 30min, put it in an oven, heat up from 30°C to 180°C (heating rate: 5°C / min), and keep at 180°C for 30-90min, then naturally cool to room temperature, and finally wash with ethanol several times And save it in ethanol for later use, and obtain the ultrathin PdPtRu trimetallic nanosheet stack assembly material.

[0032] The ultra-thin PdPtRu three-metal nanosheet stack assembly material was systematically studied on its morphology, composition, and microstructure by modern nanometer testing and analysis techniques such as TEM, HRTEM, and SEM-EDS. TEM, HRTEM ( figure 1 A, B) Characterized as a two-dimen...

Embodiment 2

[0034] In a 25mL polytetrafluoroethylene reactor liner, add 100mg of cetyltrimethylammonium chloride, 100mg of polyvinylpyrrolidone, 8mg of palladium acetylacetonate, 10mg of platinum acetylacetonate, and 8mg of anhydrous chloride Nickel, 1.35-8.1mg of ferric chloride, 50mg of tungsten hexacarbonyl and 12mL of absolute ethanol. Stir at room temperature at a speed of 600rpm for 30min, put it in an oven, heat up from 30°C to 180°C (heating rate: 5°C / min), and keep at 180°C for 30-90min, then naturally cool to room temperature, and finally wash with ethanol several times And save it in ethanol for later use, and obtain the ultrathin PdPtRh trimetallic nanosheet stack assembly material.

[0035] TEM characterization as Figure 4 A, B, Trimetallic PdPtNi nanocrystals with two-dimensional hexagonal ring assembly structure.

Embodiment 3

[0037]In a 25mL polytetrafluoroethylene reactor liner, add 100mg of cetyltrimethylammonium chloride, 100mg of polyvinylpyrrolidone, 8mg of palladium acetylacetonate, 10mg of platinum acetylacetonate, and 13mg of rhodium trichloride , 1.35-8.1mg of ferric chloride, 50mg of tungsten hexacarbonyl and 12mL of absolute ethanol. Stir at room temperature at a speed of 600rpm for 30min, put it in an oven, heat up from 30°C to 180°C (heating rate: 5°C / min), and keep at 180°C for 30-90min, then naturally cool to room temperature, and finally wash with ethanol several times And save it in ethanol for later use, and obtain the ultrathin PdPtRh trimetallic nanosheet stack assembly material.

[0038] TEM characterization as Figure 5 A, B, Trimetallic PdPtRh nanocrystals are hexagonal sheet-assembled structures.

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Abstract

The invention discloses a preparation method and application of an ultra-thin multi-metal nanosheet piling assembly material. The preparation method includes the following steps that 1, hexadecyl trimethyl ammonium chloride, polyvinylpyrrolidone, palladium precursor salt, platinum precursor salt, selectable metal precursor salt, ferric trichloride and tungsten hexacarboxyl are dissolved with ethylalcohol, stirred and mixed uniformly; 2, the temperature of the material obtained in the first step is increased to 175-185 DEG C from room temperature, a constant-temperature reaction is conducted for 30-90 min, and then cooling is conducted until room temperature is reached; 3, the material obtained in the second step is sufficiently washed with ethyl alcohol, and then the ultra-thin multi-metal nanosheet piling assembly material is obtained. Through the one-step method, the ultra-thin multi-metal nanosheet piling assembly material is prepared and can be used for an electrocatalytic reaction of micromolecule fuel.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a preparation method and application of an ultra-thin multi-metal nanosheet stack assembly material. Background technique [0002] In recent years, due to the important application prospects of noble metal nanomaterials in various fields such as catalysis, energy, and biomedicine, it is extremely important to develop methods for preparing noble metal-based nanostructures with specific structures and special functions. Among them, the application of platinum group noble metals in the field of electrocatalysis is particularly prominent. For example, among the numerous electrocatalytic materials currently available, platinum-based (Pt-) materials are excellent catalysts for the electrocatalytic oxidation of many fuel small molecules. However, Pt is expensive, scarce in reserves, and easily produces CO-like toxic intermediates, which greatly restricts its furthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/00B01J23/89B01J35/00B01J35/02
CPCB01J23/002B01J23/462B01J23/464B01J23/468B01J23/892B01J35/0033B01J35/02B01J35/023
Inventor 谢水奋王媛媛刘凯王伟吕梓禧严贤冰
Owner HUAQIAO UNIVERSITY
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