Palladium-copper gold nanometer spinous electrocatalyst and preparation method thereof

A gold nano-catalyst technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effect of high yield, simple preparation method and high application prospect

Inactive Publication Date: 2019-03-01
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although palladium-based bimetallic alloy catalysts are at the forefront of technology, the construction of palladium-based multimetallic catalysts with three-dimensional dendritic nanostructures remains a great challenge.

Method used

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  • Palladium-copper gold nanometer spinous electrocatalyst and preparation method thereof
  • Palladium-copper gold nanometer spinous electrocatalyst and preparation method thereof
  • Palladium-copper gold nanometer spinous electrocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A preparation method of palladium-copper-gold nano-thorn electrocatalyst, said method comprising the steps of:

[0041] 1) prepare sodium chloropalladate, cupric chloride and chloroauric acid solution with a concentration of 20mM respectively, a hydrochloric acid solution with a concentration of 6M and an ascorbic acid solution with a concentration of 0.1M;

[0042] 2) Mix 2.5mL of sodium chloropalladate, 1mL of copper chloride and 1mL of chloroauric acid solution, then add 0.2mL of hydrochloric acid solution, then add 200mg of potassium bromide and 50mg of F127, mix well by ultrasonic; finally add 2mL of ascorbic acid solution , ultrasonically mixed for 20 minutes;

[0043] 3) After the solution is fully mixed, place it in an oil bath and heat it to 95° C., react for 30 minutes, wash, centrifuge, and dry to obtain the palladium-copper-gold nanothorn electrocatalyst.

[0044] The SEM figure of the palladium-copper-gold nanothorn obtained is shown in figure 1 . The TE...

Embodiment 2

[0047] A preparation method of palladium-copper-gold nano-thorn electrocatalyst, said method comprising the steps of:

[0048] 1) prepare sodium chloropalladate, cupric chloride and chloroauric acid solution with a concentration of 20mM respectively, a hydrochloric acid solution with a concentration of 6M and an ascorbic acid solution with a concentration of 0.1M;

[0049] 2) Mix 3mL sodium chloropalladate, 0.75mL cupric chloride and 0.75mL chloroauric acid solution, then add 0.2mL hydrochloric acid solution, then add 200mg potassium bromide and 50mg F127, and mix well by ultrasonic. Finally, 2 mL of ascorbic acid solution was added, and ultrasonically mixed for 20 minutes;

[0050] 3) After the solutions are fully mixed, they are placed in an oil bath and heated to 95° C., reacted for 30 minutes, washed, centrifuged, and dried to obtain the palladium-copper-gold multi-branched nanoparticle oxygen reduction catalyst.

[0051] Obtain the SEM figure of palladium-copper-gold mul...

Embodiment 3

[0054] A preparation method of palladium-copper-gold nano-thorn electrocatalyst, said method comprising the steps of:

[0055] 1) prepare sodium chloropalladate, cupric chloride and chloroauric acid solution with a concentration of 20mM respectively, a hydrochloric acid solution with a concentration of 6M and an ascorbic acid solution with a concentration of 0.1M;

[0056] 2) Mix 1.5mL sodium chloropalladate, 1.5mL cupric chloride and 1.5mL chloroauric acid solution respectively, then add 0.2mL hydrochloric acid solution, then add 200mg potassium bromide and 50mg F127, and mix well by ultrasonic. Finally, 2 mL of ascorbic acid solution was added, and ultrasonically mixed for 20 minutes;

[0057] 3) After the solution is fully mixed, place it in an oil bath and heat it to 95° C., react for 30 minutes, wash, centrifuge, and dry to obtain the palladium-copper-gold needle-shaped nanoparticle oxygen reduction catalyst.

[0058] Obtain the SEM figure of palladium copper gold needle...

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PUM

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Abstract

The invention discloses a palladium-copper gold nanometer spinous oxygen reduction catalyst and a preparation method thereof. The preparation method comprises the following steps: respectively preparing a sodium tetrachloropalladate solution, a copper chloride solution and a chloroauric acid solution which have the concentration of 1 to 30 mM, a hydrochloric acid solution with the concentration of1 to 10 M and an ascorbic acid solution with the concentration of 0.01 to 0.5 M; mixing the sodium tetrachloropalladate solution, the copper chloride solution and the chloroauric acid solution of which the total volume is 4.5 mL, then adding 0.1 to 0.5 mL of the prepared hydrochloric acid solution, adding 0.1 to 0.5 g of potassium bromide and F127, and mixing uniformly; finally adding 1 to 10 mLof the ascorbic acid solution; after the solutions are fully mixed, placing the mixture in an oil bath pan, heating to 70 to 130 DEG C, reacting for 0.1 to 3 hours, and performing washing, centrifuging and drying to obtain the palladium-copper gold nanometer spinous electrocatalyst. The preparation method has the advantages of simple preparation process, and short reaction time. The material prepared at normal temperature and under normal pressure has superior electrochemical oxidation reduction performance.

Description

(1) Technical field [0001] The invention relates to a palladium-copper-gold nano-thorn electrocatalyst and a preparation method thereof. The catalyst can be used for research on electrochemically catalyzed oxidation-reduction reactions. (2) Background technology [0002] In the past few years, due to its high efficiency, unique energy density, low operating temperature, and environmental friendliness, direct methanol fuel cells have attracted much attention as a new generation of energy with development potential. In general, some important characteristics of direct methanol fuel cells (eg, energy efficiency and lifetime) largely depend on the performance of the catalyst. For the commercialization of direct methanol fuel cells, efficient, stable, and low-cost catalysts are indispensable. Today, platinum-based nanomaterials are the most commonly used catalysts due to their high catalytic activity in both cathodic and anodic reactions. However, the high cost of platinum-base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9041H01M4/9091Y02E60/50
Inventor 王鸿静尹淑丽王自强许友薛海荣王亮
Owner ZHEJIANG UNIV OF TECH
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