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A preparation method of concave hollow platinum palladium nanocrystals, concave hollow platinum palladium nanocrystals and applications thereof

A nano-crystal and concave-type technology, which is applied in the direction of nanotechnology, microsphere preparation, chemical instruments and methods, etc., can solve the problems of lack of mature technology and achieve the effects of reduced dosage, high catalytic activity and mild reaction conditions

Active Publication Date: 2021-11-16
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to realize hollow structure and high-index crystal face at the same time is not yet a mature process at this stage.

Method used

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  • A preparation method of concave hollow platinum palladium nanocrystals, concave hollow platinum palladium nanocrystals and applications thereof
  • A preparation method of concave hollow platinum palladium nanocrystals, concave hollow platinum palladium nanocrystals and applications thereof
  • A preparation method of concave hollow platinum palladium nanocrystals, concave hollow platinum palladium nanocrystals and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] A kind of preparation method of concave type hollow platinum palladium nano crystal specifically comprises the following steps:

[0074] a) Mix palladium source compound with surfactant, reducing agent, first solvent and surface coating agent and react at 180°C for 100 minutes, then centrifuge and wash to obtain palladium nanocrystals; palladium source compound, surfactant , The weight ratio of the reducing agent, the first solvent, and the surface coating agent is 1:1:1:150:1;

[0075] b) Disperse palladium nanocrystals in the first solvent, add palladium source compound, surfactant, reducing agent and surface coating agent, mix and react at 180°C for 100 minutes to prepare concave palladium nanocrystals; palladium nanocrystals , the weight ratio of the first solvent, palladium source compound, surfactant, reducing agent and surface coating agent is 1:150:1:1:1:1;

[0076] c) Disperse concave palladium nanocrystals in the second solvent, add surfactant, platinum sourc...

Embodiment 2

[0081] A kind of preparation method of concave type hollow platinum palladium nano crystal specifically comprises the following steps:

[0082] a) Mix palladium source compound with surfactant, reducing agent, first solvent and surface coating agent and react at 30°C for 180 minutes, then centrifuge and wash to obtain palladium nanocrystals; palladium source compound, surfactant , The weight ratio of the reducing agent, the first solvent, and the surface coating agent is 1:5:2:200:3;

[0083] b) Disperse palladium nanocrystals in the first solvent, add a palladium source compound, a surfactant, a reducing agent and a surface coating agent to mix and react at 30°C for 180 minutes to prepare concave palladium nanocrystals; palladium nanocrystals , the weight ratio of the first solvent, palladium source compound, surfactant, reducing agent and surface coating agent is 2:200:1:5:2:3;

[0084] c) Disperse the concave palladium nanocrystals in the second solvent, add a surfactant, ...

Embodiment 3

[0089] A kind of preparation method of concave type hollow platinum palladium nano crystal specifically comprises the following steps:

[0090] a) Mix palladium source compound with surfactant, reducing agent, first solvent and surface coating agent and react at 60°C for 160 minutes, then centrifuge and wash to obtain palladium nanocrystals; palladium source compound, surfactant , The weight ratio of the reducing agent, the first solvent, and the surface coating agent is 1:7:2:250:2;

[0091] b) Disperse palladium nanocrystals in the first solvent, add palladium source compound, surfactant, reducing agent and surface coating agent, mix and react at 60°C for 160 minutes to prepare concave palladium nanocrystals; palladium nanocrystals , the weight ratio of the first solvent, palladium source compound, surfactant, reducing agent and surface coating agent is 2.5:250:1:8:2.5:4;

[0092] c) Disperse concave palladium nanocrystals in the second solvent, add surfactant, platinum sou...

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Abstract

The invention belongs to the technical field of functional nanometer materials. The invention discloses a method for preparing a concave hollow platinum-palladium nanocrystal. The synthesis method comprises the following steps: using the concave palladium nanocrystal as a template to uniformly deposit a platinum nanoshell layer, and removing the palladium core by selective chemical etching to obtain Concave hollow platinum palladium nano crystal; the invention also discloses a concave hollow platinum palladium nano crystal and its application. The method provided by the invention successfully obtains concave hollow platinum-palladium nanocrystals, the synthesis process is simple, the synthesis conditions are mild, and it is suitable for large-scale preparation. The concave hollow platinum-palladium nanocrystal obtained by the present invention is a hollow platinum-palladium nanocrystal whose outermost layer is a high-index crystal plane. The nanocrystal can greatly improve the intrinsic activity of the platinum surface while improving the utilization rate of platinum. The catalyst and the synthesis process prepared by the invention can meet the demand of fuel cell cathode catalysts, and are helpful for promoting the industrialization of fuel cells.

Description

technical field [0001] The invention relates to the technical field of functional nanomaterials, in particular to a method for preparing a hollow hollow platinum-palladium nanocrystal, a hollow hollow platinum-palladium nanocrystal and applications thereof. Background technique [0002] The reason why the modern chemical industry is so developed, and the chemical products that can meet people's needs are continuously produced is because catalysts are widely used in the modern chemical industry. Generally speaking, the role of catalysts can be summarized into three aspects: reducing the activation energy of the reaction, making possible chemical reactions that are thermodynamically impossible; increasing the rate of the reaction, improving the kinetics of the reaction, thereby reducing the reaction temperature, The purpose of reducing the energy consumption of the reaction; reducing the reaction energy barrier of the target product and improving the selectivity of the target ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/06B82Y40/00H01M4/92B01J23/44B22F9/24B22F1/02
CPCY02E60/50
Inventor 叶伟陶婷
Owner HANGZHOU NORMAL UNIVERSITY
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