Graded dendritic PtCu electro-catalyst and preparation method thereof

A dendritic and cubic technology, applied in the field of hierarchical dendritic PtCu electrocatalysts and its preparation, achieves the effects of high repeatability, simple process and excellent catalytic performance

Active Publication Date: 2019-01-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the oil phase system of organic solution, there are few reports on the preparation of hierarchical dendritic PtCu materials.

Method used

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  • Graded dendritic PtCu electro-catalyst and preparation method thereof
  • Graded dendritic PtCu electro-catalyst and preparation method thereof
  • Graded dendritic PtCu electro-catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A hierarchical dendritic PtCu electrocatalyst and a preparation method thereof, comprising the steps of:

[0042] (1) Mix 9 mL of oleylamine with 1 mL of oleic acid solution, and obtain a colorless and clear solution by ultrasonication at 55° C. to obtain a mixed solution of oleylamine and oleic acid;

[0043] (2) Add 0.5 mL of ethylene glycol solution to the mixed solution of oleylamine and oleic acid described in (1), and sonicate at 55°C to a colorless and clear solution;

[0044] (3) Add 8.0 mg of platinum acetylacetonate and 5.2 mg of copper acetylacetonate to the clear mixed solution obtained in (2), and sonicate at 55° C. to a colorless and clear solution;

[0045] (4) The above clarified mixed solution was placed in an oil bath at 170° C. for 12 hours.

[0046] (5) The product is centrifuged and washed with a mixed solution of ethanol and cyclohexane.

[0047] (6) Soak the black product in 5mL concentrated nitric acid solution for 1 day, then centrifuge and wa...

Embodiment 2

[0055] A hierarchical dendritic PtCu electrocatalyst and a preparation method thereof, comprising the steps of:

[0056] (1) Mix 9 mL of oleylamine with 1 mL of oleic acid solution, and obtain a colorless and clear solution by ultrasonication at 55° C. to obtain a mixed solution of oleylamine and oleic acid;

[0057] (2) Add 0.5 mL of ethylene glycol solution to the mixed solution of oleylamine and oleic acid described in (1), and sonicate at 55°C to a colorless and clear solution;

[0058] (3) Add 8.0 mg of platinum acetylacetonate and different contents of copper acetylacetonate to the clarified mixed solution obtained in (2) for comparison. In this example, 10.4 mg and 2.6 mg of copper acetylacetonate are selected, and then ultrasonicated at 55° C. to a colorless clear solution;

[0059] (4) The above clarified mixed solution was placed in an oil bath at 170° C. for 12 hours.

[0060] (5) The product is centrifuged and washed with a mixed solution of ethanol and cyclohexa...

Embodiment 3

[0063] A hierarchical dendritic PtCu electrocatalyst and a preparation method thereof, comprising the steps of:

[0064] (1) Mix different amounts of oleylamine and oleic acid solution. In this example, 8mL oleylamine / 2mL oleic acid and 7mL oleylamine / 3mL oleic acid were respectively selected, and a colorless and clear solution was obtained by ultrasonication at 55°C to obtain oleylamine and oleylamine. Oleic acid mixed solution;

[0065] (2) Add 0.5 mL of ethylene glycol solution to the mixed solution of oleylamine and oleic acid described in (1), and sonicate at 55°C to a colorless and clear solution;

[0066] (3) Add 8.0 mg of platinum acetylacetonate and 5.2 mg of copper acetylacetonate to the clear mixed solution obtained in (2), and sonicate at 55° C. to a colorless and clear solution;

[0067] (4) The above clarified mixed solution was placed in an oil bath at 170° C. for 12 hours.

[0068] (5) The product is centrifuged and washed with a mixed solution of ethanol and...

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Abstract

The invention discloses a graded dendritic PtCu electro-catalyst and a preparation method thereof. The preparation method comprises the following steps: mixing oleylamine with oleic acid, heating, andcarrying out ultrasonic treatment, so as to obtain a colorless settled solution; maintaining the temperature, continuing to add ethanol, and carrying out ultrasonic treatment, so as to obtain a colorless settled solution; maintaining the temperature, continuing to add platinum acetylacetonate and copper acetylacetonate, and carrying out ultrasonic treatment, so as to obtain a light blue settled solution; and heating for reducing the light blue settled solution, so as to prepare graded dendritic PtCu. The method for preparing graded dendritic PtCu by virtue of an oil-phase solvent method is simple, stable and safe in reaction and high in repeatability. Meanwhile, by simply changing the parameters, the preparation of a PtCu nano-particle cube assembly and a PtCu nanometer concave-surface cube assembly can be realized. The method disclosed by the invention has a guiding significance to the preparation of other metal nanostructures.

Description

technical field [0001] The invention belongs to the field of manufacturing inorganic nanometer catalytic materials, and in particular relates to a hierarchical dendritic PtCu electrocatalyst and a preparation method thereof. Background technique [0002] Due to its high catalytic activity and strong selectivity, noble metal platinum catalysts have been widely used in industrial catalysis, especially in the field of petroleum and chemical catalysis, including reforming of petroleum hydrocarbons, oxidation and hydrogenation of unsaturated compounds, and CO, NO x process of removal. In the field of electrocatalysis, especially in the fuel cell cathode oxygen reduction process, anode fuel oxidation process and electrolytic water hydrogen evolution process, platinum-based catalysts are still the catalysts with the highest catalytic activity and the best stability in acidic electrolytes. The content of platinum is only five parts per billion, and the scarcity of reserves makes pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/02
CPCB01J23/8926B01J35/026
Inventor 阳晓宇王永沈乐伟刘钰王谱余豪争方芳应杰田歌常刚刚
Owner WUHAN UNIV OF TECH
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