Platinum alloy nano core-shell cube and preparation method thereof

A nano-core-shell and platinum alloy technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effects of controllable composition, easy operation and simple method

Active Publication Date: 2016-01-13
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the nanoparticles of the platinum-cobalt binary system, it has been reported that most of them are alloy particles with uniform composition, including cubes, octahedrons, and dendritic particles. Regarding the preparation of platinum-cobalt core-shell cubic bimetallic nanoparticles, domestic There is no report outside

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  • Platinum alloy nano core-shell cube and preparation method thereof
  • Platinum alloy nano core-shell cube and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 0.017mmol of platinum acetylacetonate and 0.05mmol of cobalt acetylacetonate into a three-neck flask, add 8ml of oleylamine and 2mL of oleic acid, heat and stir at 130°C for 5min under the protection of argon to obtain the first mixed solution A. The first mixed solution A was quickly transferred to an oil bath at 225°C, and after the temperature was stabilized for 5 minutes, carbon monoxide was introduced to react for 30 minutes to obtain a black suspension B. After cooling to room temperature, it was washed with chloroform three times, and vacuum-dried overnight at 60 °C to obtain platinum-cobalt nano-core-shell cubes.

[0030] attached figure 1 The TEM image of the prepared platinum-cobalt nano-core-shell cube particles, attached figure 2 The high-resolution TEM image of the prepared platinum-cobalt nano-core-shell cube particles was obtained by figure 1 and figure 2 It can be seen that the particle size of the obtained platinum-cobalt nano-core-shell cube...

Embodiment 2

[0032] Weigh 0.02mmol of platinum acetylacetonate and 0.05mmol of cobalt acetylacetonate into a three-neck flask, add 8ml of oleylamine and 2mL of oleic acid, heat and stir at 130°C for 5min under the protection of argon to obtain the first mixed solution A. The first mixed solution A was quickly transferred to an oil bath at 220°C, and after the temperature was stabilized for 5 minutes, carbon monoxide was introduced to react for 30 minutes to obtain a black suspension B. After cooling to room temperature, it was washed with chloroform three times, and vacuum-dried overnight at 60 °C to obtain platinum-cobalt nano-core-shell cubes. The platinum-cobalt nano-core-shell cube obtained in this example has similar structure and characteristics to the platinum-cobalt nano-core-shell cube obtained in Example 1.

Embodiment 3

[0034] Weigh 0.017mmol of platinum acetylacetonate and 0.05mmol of cobalt acetylacetonate into a three-necked flask, add 8ml of octadecylamine and 2mL of oleic acid, heat and stir at 140°C for 5min under the protection of argon to obtain the first mixed solution A. The first mixed solution A was quickly transferred to an oil bath at 230°C, and after the temperature was stabilized for 5 minutes, carbon monoxide was introduced to react for 40 minutes to obtain a black suspension B. After cooling to room temperature, it was washed with chloroform three times, and vacuum-dried overnight at 60 °C to obtain platinum-cobalt nano-core-shell cubes. The platinum-cobalt nano-core-shell cube obtained in this example has similar structure and characteristics to the platinum-cobalt nano-core-shell cube obtained in Example 1.

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Abstract

The invention provides a platinum alloy nano core-shell cube and a preparation method thereof. The preparation method comprises the following steps: 1) under the protection of an inert gas, adding platinum acetylacetone, an acetylacetone metallic compound, alkylamine and an alkyl acid in a reaction vessel simultaneously to be homogenized to obtain a uniformly mixed first mixed solution; 2) quickly transferring the first mixed solution obtained in the step 1) to a high-temperature oil bath, preserving heat for a preset time, then introducing a reducing gas for reaction to obtain a black suspension; and 3) sequentially conducting organic solvent cleaning, magnetic separation and vacuum drying on the obtained black suspension to obtain the platinum alloy nano core-shell cube. The platinum alloy nano core-shell cube is good in dispersity, controllable in components and easy to collect and is magnetic; and in the preparation method, a one-pot oleylamine system is adopted and the used reagents are nontoxic, and the preparation method is simple, and is easy to operate.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a platinum alloy nano core-shell cube and a preparation method thereof. Background technique [0002] Noble metal nanomaterials, especially platinum-based nanomaterials, have broad application prospects in many fields such as catalysis due to their unique physical and chemical properties. However, the reserves of precious metals are scarce and expensive, and people have turned their attention to improving their use efficiency. For example, combining precious metals such as platinum with non-noble metals to prepare bimetallic nanocatalysts not only greatly reduces the amount of precious metals, but also utilizes the intermetallic interaction between the two metals. The electron transfer effect produces a synergistic effect. [0003] With the deepening of nanotechnology research, it is found that the combination of two or more nanostructures will refle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/02B82Y40/00B82Y30/00
Inventor 祝艳黄爽爽孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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