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Mesoporous platinum nickel phosphorus nanocage electrocatalyst and preparation method thereof

An electrocatalyst and nanocage technology, which is applied in the field of mesoporous platinum-nickel-phosphorus nanocage electrocatalyst and its preparation, can solve problems such as the difficulty of three-dimensional platinum-nickel-phosphorus nanostructures, and achieve simple synthesis methods, reduced usage, and high product yield high effect

Inactive Publication Date: 2019-04-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the controllable synthesis of porous phosphorus-doped platinum-based nanocomposites has been successfully achieved in recent years, it is still very difficult to synthesize three-dimensional platinum-nickel-phosphorus nanostructures by conventional methods.

Method used

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  • Mesoporous platinum nickel phosphorus nanocage electrocatalyst and preparation method thereof
  • Mesoporous platinum nickel phosphorus nanocage electrocatalyst and preparation method thereof
  • Mesoporous platinum nickel phosphorus nanocage electrocatalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0045] A preparation method of mesoporous platinum-nickel-phosphorus nano-cage electrocatalyst, said method comprising the steps of:

[0046] (1) Potassium chloroplatinite, 0.1M ascorbic acid, 20mM nickel chloride, 20mM sodium hypophosphite and 0.2M sodium borohydride solution were prepared respectively with a concentration of 20mM;

[0047] (2) Add 200 mL of ethanol solution dropwise to a mixed solution containing 15.2 mL of water and 6.4 mL of ammonia water, and stir at room temperature for 1 hour, then add 12 mL of tetraethyl orthosilicate dropwise to the above solution, and continue stirring for 3 hours, and then centrifuged three times each with water and ethanol. Finally, the obtained silica spheres were dried in a vacuum oven at 50° C. for 10 hours;

[0048] (3) Take 50 mg of silica spheres and ultrasonically disperse them in a mixed solution containing 10 mL of isopropanol and 200 uL of 3-aminopropyltrimethoxysiloxane, and then reflux it at 80°C for 12 hours. Finally,...

Embodiment 2

[0054] A preparation method of mesoporous platinum-nickel nano-cage electrocatalyst, said method comprising the steps of:

[0055] (1) Potassium chloroplatinite, 0.1M ascorbic acid, 20mM nickel chloride, 20mM sodium hypophosphite and 0.2M sodium borohydride solution were prepared respectively with a concentration of 20mM;

[0056] (2) Add 200 mL of ethanol solution dropwise to a mixed solution containing 15.2 mL of water and 6.4 mL of ammonia water, and stir at room temperature for 1 hour, then add 12 mL of tetraethyl orthosilicate dropwise to the above solution, and continue stirring for 3 hours, and then centrifuged three times each with water and ethanol. Finally, the obtained silica spheres were dried in a vacuum oven at 50° C. for 10 hours;

[0057] (3) Take 50 mg of silica spheres and ultrasonically disperse them in a mixed solution containing 10 mL of isopropanol and 200 uL of 3-aminopropyltrimethoxysiloxane, and then reflux it at 80°C for 12 hours. Finally, the functi...

Embodiment 3

[0064] A preparation method of mesoporous platinum-nickel nano-cage electrocatalyst, said method comprising the steps of:

[0065](1) Potassium chloroplatinite, 0.5M ascorbic acid, 50mM nickel chloride, 50mM sodium hypophosphite and 0.5M sodium borohydride solution were prepared respectively;

[0066] (2) Add 300mL ethanol solution dropwise to the mixed solution containing 20mL water and 10mL ammonia water, and stir at room temperature for 2 hours, then add 20mL tetraethyl orthosilicate dropwise to the above solution, and continue stirring for 5 hours, The product was then washed by centrifugation with water and ethanol. Finally, the obtained silica spheres were dried in a vacuum oven at 100° C. for 20 hours;

[0067] (3) 100 mg of silica spheres were ultrasonically dispersed in a mixed solution containing 20 mL of isopropanol and 300 uL of 3-aminopropyltrimethoxysiloxane, which was then refluxed at 100° C. for 20 hours. Finally, the functionalized silica spheres were centri...

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Abstract

The invention discloses a mesoporous platinum nickel phosphorus nanocage electrocatalyst and a preparation method thereof. Ultrasonically dispersing 20 to 100 mg of silica spheres in a mixed solutionof 5 to 20 mL of isopropanol and 100 to 300 [Mu]L of 3-aminopropyltrimethoxysiloxane, and then performing backflow; taking 1 to 5 mg of functionalized silica spheres and 10 to 30 mg of F127 for ultrasonic dispersion in 1 to 5 mL of potassium chloroplatinite solution, and adding 1 to 5 mL of ascorbic acid solution to the solution in the above-mentioned solution for ultrasonic processing; dispersingin HF solution and standing after centrifugal washing, adding 1 to 10 mL of the above solution to a mixed solution of 0.1 to 1 mL of nickel chloride and 1 to 10 mL of sodium hypophosphite, and then adding 1 to 5mL of sodium borohydride solution; and using water to perform centrifugal washing on the obtained product, and then drying in a vacuum oven. The preparation method has the advantages of simple preparation process, good repeatability, high product yield, which can perform synthesis in high-dose, and is convenient for industrial production.

Description

(1) Technical field [0001] The invention relates to a mesoporous platinum-nickel-phosphorus nano-cage electrocatalyst and a preparation method thereof. The catalyst can be used for research on electrochemically catalyzing methanol oxidation and oxygen reduction reactions. (2) Background technology [0002] Due to the increasingly serious environmental, economic and energy problems caused by the excessive use of fossil fuels, direct methanol fuel cells have attracted great attention as energy conversion devices for automobiles and portable electronic devices. However, the slow kinetics of the oxygen reduction reaction at the cathode and the poor stability of the methanol oxidation at the anode seriously hinder the commercialization of direct methanol fuel cells. So far, platinum-based nanomaterials have been recognized as the most efficient electrocatalysts for direct methanol fuel cells (Nie, Y.; Li, L.; Wei, Z., Recent advancements in Pt and Pt-free catalysts for oxygen red...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/92H01M8/1011
CPCH01M4/8605H01M4/8652H01M4/88H01M4/8882H01M4/921H01M8/1011Y02E60/50Y02P70/50
Inventor 王亮邓凯王自强许友薛海荣王鸿静
Owner ZHEJIANG UNIV OF TECH
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