Preparation method of two-dimensional Pd nano sieve rich in catalytic activity boundary

A catalytic activity, nano-sieve technology, applied in the direction of nanotechnology, electrical components, battery electrodes, etc., can solve the problems of uncontrollable size and shape, achieve superior catalytic performance, improve electrocatalytic activity, and have good electrocatalytic application prospects Effect

Active Publication Date: 2021-10-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the uncontrollable defects of elemental composition, size and shape of noble metal nanomaterials synthesized by tradition

Method used

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  • Preparation method of two-dimensional Pd nano sieve rich in catalytic activity boundary
  • Preparation method of two-dimensional Pd nano sieve rich in catalytic activity boundary
  • Preparation method of two-dimensional Pd nano sieve rich in catalytic activity boundary

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of two-dimensional Pd nanosieve: the preparation method of Pd nanosieve, specifically the following steps:

[0028] First, 250 mg of palladium acetylacetonate, 150 mg of molybdenum hexacarbonyl, 2.5 g of cetyltrimethylammonium bromide, and 2.5 g of ascorbic acid were added to a mixed solution of 600 mL of ethanol and deionized water, and stirred at room temperature for 48 h. The volume ratio of ethanol to deionized water was 5:1.

[0029] Then, the reacted solid-liquid mixture was centrifuged to obtain a black solid product. The product was washed 5 times with a mixed solution of ethanol and deionized water, the volume ratio of ethanol and deionized water was 1:1, and freeze-dried to obtain the product Pd nanosieve.

[0030] figure 1 The scanning electron microscope image of the Pd nanosieve prepared in Example 1, it can be seen from the figure that the morphology of the sample prepared in Example 1 is a nanosheet.

[0031] figure 2 The transmission electro...

Embodiment 2

[0037] The preparation of Pd nanosieves is specifically the following steps:

[0038] First, 20 mg of palladium acetylacetonate, 20 mg of molybdenum hexacarbonyl, 0.1 g of cetyltrimethylammonium bromide, and 0.1 g of ascorbic acid were added to a mixed solution of 30 mL of ethanol and deionized water, and stirred at room temperature for 72 h. The volume ratio of ethanol to deionized water was 5:1.

[0039] Then, the reacted solid-liquid mixture was centrifuged to obtain a black solid product. The product was washed 5 times with a mixed solution of ethanol and deionized water, the volume ratio of ethanol and deionized water was 1:1, and freeze-dried to obtain the product Pd nanosieve.

Embodiment 3

[0041] The preparation of Pd nanosieves is specifically the following steps:

[0042] First, 400 mg palladium acetylacetonate, 200 mg molybdenum hexacarbonyl, 3 g cetyltrimethylammonium bromide, and 3 g ascorbic acid were added to a mixed solution of 500 mL ethanol and deionized water, and stirred at room temperature for 72 h. The volume ratio of ethanol to deionized water was 5:1.

[0043] Then, the reacted solid-liquid mixture was centrifuged to obtain a black solid product. The product was washed 5 times with a mixed solution of ethanol and deionized water, the volume ratio of ethanol and deionized water was 1:1, and freeze-dried to obtain the product Pd nanosieve.

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Abstract

The invention relates to the technical field of two-dimensional precious metal nano materials, and discloses a preparation method of a two-dimensional Pd nano sieve rich in catalytic activity boundary. The preparation method specifically comprises the steps of adding palladium acetylacetonate, molybdenum hexacarbonyl, hexadecyl trimethyl ammonium bromide and ascorbic acid into a mixed solution of ethanol and water, uniformly stirring and reacting the mixed materials, and separating, cleaning and drying the obtained solid-liquid mixture to obtain the Pd nano sieve. The nano sieve can be used for a fuel cell and an efficient electrocatalyst in an electrochemical oxygen reduction process. The ultrathin porous nanostructure has a large specific surface area and excellent charge transfer capability. A large number of low-index crystal faces and steps beneficial to oxygen reduction catalysis are exposed on the edges of holes, the number of unsaturated active sites is greatly increased, and the electrocatalytic activity is effectively improved. The method is high in yield, easy to operate, low in energy consumption and beneficial to further scientific research, popularization and application of the two-dimensional precious metal nano material.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional metal material preparation, and relates to a method for preparing a two-dimensional Pd nanosieve rich in catalytically active boundaries. Background technique [0002] In recent years, two-dimensional nanomaterials exhibit many unique physical and chemical properties due to their quantum effects, small size effects, surface effects and macroscopic quantum tunneling effects, which have attracted widespread attention from researchers. Among them, noble metal nanomaterials show potential application value in the fields of catalysis, electrochemistry, new energy, medicine and optics due to their surface plasmon effect, quantum effect and biocompatibility. However, the scarcity and high price of precious metals have greatly hindered their widespread application. The properties of noble metal nanomaterials are closely related to their shape and size. Therefore, the size and shape controllable s...

Claims

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Application Information

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IPC IPC(8): B22F9/24H01M4/92B82Y40/00
CPCB22F9/24H01M4/92B82Y40/00Y02E60/50
Inventor 郭俊杰田嘉康宋艳慧刘培植王旭东
Owner TAIYUAN UNIV OF TECH
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