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A platinum-cobalt nano-bimetallic catalyst with multi-cubic dendritic structure and its preparation method and application

A bimetallic catalyst, cobalt nanotechnology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., to achieve the effects of controllable composition, easy operation and high selectivity

Active Publication Date: 2018-01-30
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report at home and abroad on the preparation of platinum-cobalt bimetallic nanoparticles with this morphology.

Method used

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  • A platinum-cobalt nano-bimetallic catalyst with multi-cubic dendritic structure and its preparation method and application
  • A platinum-cobalt nano-bimetallic catalyst with multi-cubic dendritic structure and its preparation method and application
  • A platinum-cobalt nano-bimetallic catalyst with multi-cubic dendritic structure and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 0.017 mmol of platinum acetylacetonate and 0.05 mmol of cobalt acetylacetonate into a three-necked flask, add 24.8 mmol of oleylamine and 6.3 mmol of oleic acid, heat and stir at 130°C for 5 min under the protection of argon to obtain a mixed solution A. The mixture A was quickly transferred to an oil bath at 225°C. After the temperature stabilized for 5 minutes, carbon monoxide was introduced at a flow rate of 190 mL / min, and the reaction was carried out for 30 minutes to obtain a black suspension B. After cooling to room temperature, magnetic separation afforded A as a black solid. Weigh 2 mg of black solid and 6.7 mg of platinum acetylacetonate into a three-necked flask, add 7.5 g of oleylamine and 903.9 mg of oleic acid, heat and stir at 130°C for 5 min under the protection of argon to obtain a mixture C. The mixture C was quickly transferred to an oil bath at 210°C, and carbon monoxide was introduced at the same time at a flow rate of 190 mL / min, and the reac...

Embodiment 2

[0041] Weigh 0.017mmol of platinum acetylacetonate and 0.068mmol of cobalt acetylacetonate into a three-necked flask, add 21.7mmol of hexadecylamine and 8.2mmol of lauric acid, heat and stir at 150°C for 30min under the protection of argon to obtain a mixture A. The mixture A was quickly transferred to an oil bath at 235°C. After the temperature stabilized for 8 minutes, carbon monoxide was introduced at a flow rate of 300mL / min, and the reaction was carried out for 10 minutes to obtain a black suspension B. After cooling to room temperature, magnetic separation afforded A as a black solid. Weigh 2mg of black solid and 6.7mg of platinum acetylacetonate into a three-necked flask, add 7.5g of oleylamine and 1.3g of oleic acid, heat and stir at 130°C for 5min under the protection of argon to obtain a mixture C. The mixture C was quickly transferred to an oil bath at 210°C, and carbon monoxide was introduced at the same time at a flow rate of 190 mL / min, and the reaction was carri...

Embodiment 3

[0045] Weigh 0.017mmol of platinum acetylacetonate and 0.034mmol of cobalt acetylacetonate into a three-necked flask, add 18.6mmol of dodecylamine and 6.2mmol of octadecanoic acid, heat and stir at 100°C for 10min under the protection of argon to obtain a mixed solution A. The mixture A was quickly transferred to an oil bath at 220°C. After the temperature was stabilized for 2 minutes, carbon monoxide was introduced at a flow rate of 100 mL / min, and the reaction was carried out for 1 hour to obtain a black suspension B. After cooling to room temperature, magnetic separation afforded A as a black solid. Weigh 2 mg of black solid and 6.7 mg of platinum acetylacetonate into a three-necked flask, add 7.5 g of oleylamine and 903.9 mg of oleic acid, heat and stir at 130°C for 5 min under the protection of argon to obtain a mixture C. The mixture C was quickly transferred to an oil bath at 210°C, and carbon monoxide was introduced at the same time at a flow rate of 190 mL / min, and th...

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Abstract

The invention discloses a platinum-cobalt nanobimetallic catalyst with a multicubic dendritic structure and its preparation method and application. The catalyst is a dendritic platinum-cobalt nanobimetallic structure with a total of eight branches, each of which is a Individual cubes, good dispersion, controllable composition, magnetic, easy to collect. The catalyst is produced by a liquid-phase reduction method, which is carried out in two stages. The product is regulated by regulating the proportion of metal precursors, reaction time and reaction temperature to obtain platinum-cobalt nanoparticles with different components. The reagents used are non-toxic and the method is simple. , easy to operate. The catalyst has high catalytic activity for hydrogenation of cinnamaldehyde and high selectivity for C=O.

Description

technical field [0001] The invention relates to the preparation technology and application field of nanometer materials, in particular to a platinum-cobalt nano-bimetallic catalyst with a multi-cubic dendritic structure and its preparation method and application. Background technique [0002] 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. People have turned their attention to improving their use efficiency. For example, combining precious metals such as platinum with non-noble metals to prepare bimetallics not only greatly reduces the amount of precious metals, but also utilizes electron transfer between bimetals. The effect produces a synergistic effect. [0003] For metal nanocrystal catalysts, the atomic steps, edges and corners on the high-index crystal surface, the atoms in these regions have lower coor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/02B82Y30/00B82Y40/00C07C29/141C07C33/32C07C33/20B01J35/00
CPCB82Y30/00B82Y40/00C07C29/141B01J23/8913B01J35/50B01J35/40B01J35/23C07C33/32C07C33/20
Inventor 祝艳黄爽爽孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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