Mesoporous platinum-palladium bimetallic nanoparticle and preparation method thereof

A bimetallic nano and bimetallic technology, applied in the field of nanomaterials, can solve problems such as complex synthesis methods, impact on applications, and uneven porous structure, and achieve high activity, short synthesis cycle, and simple process

Inactive Publication Date: 2017-05-31
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there are unavoidable problems in the synthesis of porous noble metal nanoparticles, such as complex synthesis

Method used

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  • Mesoporous platinum-palladium bimetallic nanoparticle and preparation method thereof
  • Mesoporous platinum-palladium bimetallic nanoparticle and preparation method thereof
  • Mesoporous platinum-palladium bimetallic nanoparticle and preparation method thereof

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Embodiment 1

[0022] This embodiment provides a kind of mesoporous platinum-palladium bimetallic nanoparticles, and its preparation method steps are as follows:

[0023] 1) Dissolve 1mL sodium chloropalladate solution (Na 2 PdCl 4 , 10mM), 1mL chloroplatinic acid hexahydrate solution (H 2 PtCl 4 , 10mM) and 21.5mg of cetylpyridinium chloride were placed in a 50mL flask, 17mL of deionized water was added, and stirred evenly at 30°C to obtain a mixed solution containing bimetals;

[0024] 2) Add 1 mL of ascorbic acid solution (concentration 0.1 M) to the mixed solution containing bimetal obtained in step 1), continue to react for 3 hours, then centrifuge the resulting reaction solution, wash with deionized water, and dry to obtain a mesoporous platinum palladium bismuth metal nanoparticles.

[0025] Such as figure 1 Shown is the TEM photo of the mesoporous platinum-palladium bimetallic nanoparticles prepared in this embodiment, it can be seen that the mesoporous platinum-palladium bimeta...

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Abstract

The invention relates to a mesoporous platinum-palladium bimetallic nanoparticle and a preparation method thereof. The particle size of the mesoporous platinum-palladium bimetallic nanoparticle is 30-100nm, and the surface of the nanoparticle has a porous structure whose aperture is uniform, and the aperture is 2-3nm. The preparation method is as follows: (1) sodium tetrachloropalladate, chloroplatinic acid and a surfactant are dissolved in water, the materials are stirred uniformly at 30-90 DEG C, and a mixed solution containing bimetal is obtained; (2) a reducing agent solution is added into the mixed solution containing bimetal obtained in the step (1), a reaction is continued to carry out for 2-5 hours, an obtained reaction solution is centrifugal and separated, and the mesoporous platinum-palladium bimetallic nanoparticle is obtained by post-treatment. The invention provides a simple method for synthesis of the mesoporous precious metal nanoparticle with simple process and short synthesis period; the synthesized mesoporous precious metal nanoparticle is used as a catalyst for an industrial nitrobenzene hydrogenation reaction with very high activity.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a mesoporous platinum-palladium bimetallic nanoparticle and a preparation method thereof. Background technique [0002] Platinum nanoparticles have unique thermal, electrical, magnetic and optical properties, which make them have broad application prospects in energy, environmental protection, petrochemical, biomedicine and other fields. However, because platinum resources are limited and expensive, people need to increase the utilization rate of platinum in practical applications, thereby reducing its consumption. Generally, introducing another metal (such as gold, silver, palladium, copper, nickel, lead, etc.) 99.23%), so platinum and palladium are easy to form alloys and have excellent properties. [0003] In general, the catalytic performance of platinum-palladium nanoparticles depends on the active sites on the surface of the particles, and the atom...

Claims

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Application Information

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IPC IPC(8): B01J23/44C07C209/36C07C211/46
CPCB01J23/44B01J35/023B01J35/1061B01J37/0009B01J37/16C07C209/36C07C211/46
Inventor 阳晓宇应杰肖宇轩魏浩苏宝连
Owner WUHAN UNIV OF TECH
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