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Platinoid bimetallic nanometer material and preparation method and application thereof

A bimetallic nano, platinum-copper technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc.

Inactive Publication Date: 2013-06-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The use of this classic method to realize the morphology control of bimetallic platinum-copper is rarely reported, and the synthesis and application of platinum-copper bimetallic nanoparticles with multi-pod morphology smaller than 10nm has not been reported so far.

Method used

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  • Platinoid bimetallic nanometer material and preparation method and application thereof
  • Platinoid bimetallic nanometer material and preparation method and application thereof
  • Platinoid bimetallic nanometer material and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0024] Weigh 110mg of PVP into a 25ml three-neck flask, add 0.8ml125mMCuCl 2 (AR) ethylene glycol solution, then add 8.55mL ethylene glycol, and start stirring at the same time to make it fully mixed and dissolved; slowly raise the temperature to 160°C in the air atmosphere, and after maintaining this temperature for 30 minutes, add H with a concentration of 77.3mM 2 PtCl 6 Solution 0.65mL solution was injected into 160℃ containing CuCl 2 In a hot solution of ethylene glycol, stir and react for 1 hour; transfer the reacted solution to a centrifuge tube, then add three times the volume of acetone, and centrifuge at 10,000rpm for 5min to obtain a platinum-copper multipod nanostructure, such as figure 1 , the size of the multipod structure is uniform, and the particle size of the synthesized nanoparticles is calculated by the Scherrer formula according to the XRD results to be 4.3nm.

[0025] The nanoparticles washed with water and ethanol were tested by EDX and ICP to obtain t...

Embodiment 2

[0027] Weigh 110mg of PVP into a 25ml three-neck flask, add 0.8ml125mMCuCl 2 (99.999%) ethylene glycol solution, then add 8.55mL ethylene glycol, and start stirring at the same time to make it fully mix and dissolve; slowly heat up to 160°C in the air atmosphere, and after maintaining this temperature for 30 minutes, add 77.3mM h 2 PtCl 6 Solution 0.65mL solution was injected into 160℃ containing CuCl 2 In a hot solution of ethylene glycol, stir and react for 1 hour; transfer the reacted solution to a centrifuge tube, then add three times the volume of acetone, and centrifuge at 10,000rpm for 5min to obtain a platinum-copper multipod nanostructure, such as figure 2 , the multipod-like structure is uniform in size.

[0028] The nanoparticles washed with water and ethanol were tested by ICP to obtain a PtCu ratio of 3.7 / 1.

Embodiment 3

[0030] Weigh 110mg of PVP into a 25ml three-neck flask, add 0.8ml125mMCuCl 2 (99.999%) ethylene glycol solution, then add 8.55mL ethylene glycol, and start stirring at the same time to make it fully mixed and dissolved; slowly heat up to 160°C in an argon atmosphere, and after maintaining this temperature for 30 minutes, the concentration will be 77.3mM H 2 PtCl 6 Solution 0.65mL solution was injected into 160℃ containing CuCl 2 In a hot solution of ethylene glycol, stir and react for 1 hour; transfer the reacted solution to a centrifuge tube, then add three times the volume of acetone, and centrifuge at 10,000rpm for 5min to obtain a platinum-copper multipod nanostructure, such as image 3 , the multipod-like structure is uniform in size.

[0031] The nanoparticles washed with water and ethanol were tested by ICP to obtain that the PtCu ratio of the nanoparticles was 2.5 / 1.

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Abstract

The invention provides a platinoid bimetallic nanometer material. The grain diameter of the material is 4-10 nanometers; the material has a multi-legged appearance; and the mole ratio of the platinoid is adjustable. The preparation method comprises the following steps of: filling soluble platinum precursor solution in 140-180 DEG C polyhydric alcohol thermal solution containing soluble copper precursor and little alkali liquor, and maintaining the temperature and stirring for 1-3 hours. The raw material of the preparation method is cheap and easy to obtain; the equipment technology is simple; and the yield is higher. The material has large potential application in the fields such as heterogeneous catalysis, electro-catalysis and photocatalysis, and particularly has excellent catalytic performance in the electro-catalysis.

Description

technical field [0001] The invention relates to a platinum-copper bimetallic nanometer material and a preparation method and application thereof. Background technique [0002] Platinum and its bimetallic nanocatalysts are widely used in the fields of heterogeneous catalysis, photocatalysis and electrocatalysis due to their efficient reduction and oxidation. In addition to the size, the morphology of platinum and its bimetallic nanocrystals also plays a key role in the catalytic and electrocatalytic activity and selectivity in the reaction. Modulating the conditions for synthesizing single-morphology catalysts, such as stabilizers, reducing agents, and surfactants, is crucial for regulating the morphology of nanoparticles. The precious metal platinum is the basic element that provides catalytic activity, and reducing the cost of the catalyst determines the practicability of the platinum catalyst. The addition of copper can not only improve the activity and selectivity of th...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00B82Y30/00H01M4/90
CPCY02E60/50
Inventor 尹杰王军虎张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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