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Preparation method of concave type hollow platinum-palladium nanocrystal, concave type hollow platinum-palladium nanocrystal and application thereof

A nanocrystal, concave technology, applied in nanotechnology, microsphere preparation, chemical instruments and methods, etc., can solve problems such as lack of mature technology, and achieve the effect of reducing dosage, improving catalytic activity, and high catalytic activity

Active Publication Date: 2019-06-04
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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  • Preparation method of concave type hollow platinum-palladium nanocrystal, concave type hollow platinum-palladium nanocrystal and application thereof
  • Preparation method of concave type hollow platinum-palladium nanocrystal, concave type hollow platinum-palladium nanocrystal and application thereof
  • Preparation method of concave type hollow platinum-palladium nanocrystal, concave type hollow platinum-palladium nanocrystal and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] A method for preparing concave hollow platinum-palladium nanocrystals specifically includes the following steps:

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

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

[0076] c) Disperse the recessed palladium nanocrystals in the second solvent, add surfact...

Embodiment 2

[0081] A method for preparing concave hollow platinum-palladium nanocrystals specifically includes the following steps:

[0082] a) The palladium source compound is mixed with surfactant, reducing agent, first solvent and surface coating agent and reacted at 30°C for 180 minutes, then centrifuged and washed to prepare palladium nanocrystals; palladium source compound, surfactant , The weight ratio of reducing agent, first solvent and surface coating agent is 1:5:2:200:3;

[0083] b) Disperse the palladium nanocrystals in the first solvent, add the palladium source compound, surfactant, reducing agent and 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, the palladium source compound, the surfactant, the reducing agent, and the surface coating agent is 2:200:1:5:2:3;

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

Embodiment 3

[0089] A method for preparing concave hollow platinum-palladium nanocrystals specifically includes the following steps:

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

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

[0092] c) Disperse the recessed palladium nanocrystals in the second solvent, add surfa...

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Abstract

The invention belongs to the technical field of functional nano-materials. The invention discloses a preparation method of concave type hollow platinum-palladium nanocrystal. The synthetic method comprises the following steps: concave palladium nanocrystal is used as a template to uniformly deposit a platinum nano-shell layer; and through a selective chemical etching method, a palladium core is removed to obtain the concave type hollow platinum-palladium nanocrystal. The invention also discloses the concave type hollow platinum-palladium nanocrystal and application thereof. By the method of the invention, the concave type hollow platinum-palladium nanocrystal is obtained successfully. The synthetic process is simple, the synthetic condition is mild, and the synthetic method is suitable forlarge-scale preparation. The concave type hollow platinum-palladium nanocrystal is hollow platinum-palladium nanocrystal with the outermost layer being a high-index crystal plane. According to the nanocrystal, utilization rate is raised, and intrinsic activity of the platinum surface also can be greatly increased. The prepared catalyst and the synthetic process can meet the requirements of a fuelcell cathode catalyst, and are helpful for promoting 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 concave hollow platinum-palladium nanocrystals, concave hollow platinum-palladium nanocrystals and applications thereof. Background technique [0002] The reason why the modern chemical industry is so developed and energy sources continue to produce chemical products that can meet people's needs is that catalysts are widely used in the modern chemical industry. Generally speaking, the role of a catalyst 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, increasing the kinetics of the reaction, and reducing the reaction temperature. The purpose of reducing reaction energy consumption; reducing the reaction energy barrier of the target product, and improving the selectivity of the target product. Genera...

Claims

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Application Information

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Patent Type & Authority Applications(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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