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Platinum nanometer material and preparation method thereof

A nanomaterial, platinum nanotechnology, applied in the field of flower-like platinum single crystal nanostructure and its preparation, can solve the problem of insufficient anion-halide ion modulation and the like

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] However, in this classical method, the modulation of anion-halogen ion is not very sufficient, especially the effect of iodide ion on the morphology of platinum nanoparticles after coordination with Pt in soluble platinum salt has not been reported yet.

Method used

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  • Platinum nanometer material and preparation method thereof
  • Platinum nanometer material and preparation method thereof
  • Platinum nanometer material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Weigh 550mg of PVP into a 25ml three-neck flask, add 9.36mL of ethylene glycol, and start stirring at the same time to fully mix and dissolve; slowly raise the temperature to 160°C, and maintain this temperature for 30 minutes. 77.3mM HPtCl 6 Solution 0.65mL of the mixed solution was sonicated for 30 minutes and then injected into a hot solution of ethylene glycol at 160°C, stirred and reacted for 1 hour; the reacted solution was transferred to a centrifuge tube, then three times the volume of acetone was added, and centrifuged at 10,000rpm for 5 minutes , that is, the platinum nanoflower-like structure is obtained, such as figure 1 In A, B, and C, it can be seen that the flower-like structure has a single and uniform shape, and the size is about 20nm.

[0021] Such as figure 1 C high-resolution electron microscopy shows that all the particles in the nanoflowers show consistent periodicity, indicating that the petal particles of the nanoflowers are in the same orienta...

Embodiment 2

[0023] Weigh 110mg of PVP into a 25ml three-neck flask, add 9.36mL of ethylene glycol, and start stirring at the same time to make it fully mixed and dissolved; slowly raise the temperature to 160°C, and after maintaining this temperature for 30 minutes, mix 0.0508g of KI solid and 77.3mM HPtCl 6 Solution 0.65mL of the mixed solution was sonicated for 30 minutes and then injected into a hot solution of ethylene glycol at 160°C, stirred and reacted for 1 hour; the reacted solution was transferred to a centrifuge tube, then three times the volume of acetone was added, and centrifuged at 10,000rpm for 5 minutes , that is, the platinum nanoflower-like structure is obtained, such as figure 2 , the shape of the flower-like structure is single, uniform, and the size is about 20nm.

Embodiment 3

[0025] Weigh 550mg of PVP into a 25ml three-neck flask, add 9.36mL of ethylene glycol, and start stirring at the same time to fully mix and dissolve; slowly raise the temperature to 140°C, and maintain this temperature for 30 minutes. 77.3mM HPtCl 6 Solution 0.65mL of the mixed solution was sonicated for 30 minutes and then injected into a hot solution of ethylene glycol at 140°C, stirred and reacted for 1 hour; the reacted solution was transferred to a centrifuge tube, then three times the volume of acetone was added, and centrifuged at 10,000rpm for 5 minutes , that is, the platinum nanoflower-like structure is obtained, such as image 3 , the shape of the flower-like structure is single, uniform, and the size is about 30nm.

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Abstract

The invention provides a platinum nanometer material with a flower-like structure. The flower-like nanometer structure is single and uniform in appearance and controllable in size. The preparation method comprises the following steps of: filling mixed solution of iodide and soluble platinum salt precursor in 120-180 DEG C polyhydric alcohol thermal solution, 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.

Description

technical field [0001] The invention relates to a flower-shaped platinum single crystal nanostructure and a preparation method thereof. Background technique [0002] Due to its efficient reduction and oxidation, platinum nanoparticles are widely used in the fields of heterogeneous catalysis, photocatalysis and electrocatalysis. In addition to the size, the morphology of platinum nanocrystals also plays a key role in the catalytic and electrocatalytic activity and selectivity in the reaction. Modulating the conditions for synthesizing platinum with a single morphology, such as stabilizers, reducing agents, surfactants, and adding impurity ions, is crucial for regulating the morphology of nanoparticles. [0003] It is an important and classic method to synthesize platinum nanocrystals with different shapes by taking advantage of the weak reducibility of polyols. The most common method of this method is to use PVP as a stabilizer, which is dissolved in an alcohol solution suc...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 尹杰王军虎张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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