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Mesoporous nano platinum-nickel oxygen reduction electrocatalyst and preparation method thereof

An electrocatalyst, nano-platinum technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of difficult synthesis of regular morphology and size, etc. Achieve the effect of enhancing catalytic activity and stability, highlighting activity and stability, and high application prospects

Inactive Publication Date: 2019-03-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Previously, researchers have synthesized platinum porous structures through various strategies such as dealloying, electrodisplacement, electrochemical deposition, and template methods, but most of them can only synthesize irregular shapes or network structures, and precisely control the synthesis of regular structures. Shape and size are still difficult to achieve

Method used

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  • Mesoporous nano platinum-nickel oxygen reduction electrocatalyst and preparation method thereof
  • Mesoporous nano platinum-nickel oxygen reduction electrocatalyst and preparation method thereof
  • Mesoporous nano platinum-nickel oxygen reduction electrocatalyst and preparation method thereof

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Effect test

Embodiment 1

[0037] A preparation method of mesoporous platinum-nickel nanoparticles oxygen reduction electrocatalyst, said method comprising the steps of:

[0038] (1) prepare the chloroplatinic acid and the nickel chloride solution that concentration is 20mM respectively, the ascorbic acid solution that concentration is 0.1M;

[0039] (2) Dissolve 30mg of F127 and 0.2g of potassium bromide in 1.25mL of water;

[0040] (3) Mix 1.125mL of chloroplatinic acid solution, 0.375mL of nickel chloride solution, 2mL of ascorbic acid solution and the solution of step (2), place in a water bath at 70°C for 12 hours, after the reaction is complete, centrifuge and wash The mesoporous platinum-nickel nanoparticle is obtained, and the product is dried at 50° C. for 12 hours to obtain the mesoporous platinum-nickel nanoparticle oxygen reduction electrocatalyst.

[0041] The SEM image of the obtained mesoporous platinum-nickel nanoparticles is shown in figure 1 . The TEM and HRTEM images of the obtaine...

Embodiment 2

[0044] A method for preparing mesoporous platinum nanoparticles oxygen reduction electrocatalyst, said method comprising the steps of:

[0045] (1) prepare the chloroplatinic acid solution that concentration is 20mM respectively, the ascorbic acid solution that concentration is 0.1M;

[0046] (2) Dissolve 30mg of F127 and 0.2g of potassium bromide in 1.25mL of water;

[0047] (3) The chloroplatinic acid solution of 1.5mL, the ascorbic acid solution of 2mL and the solution of step (2) were mixed, placed in a water bath of 70° C. for 12 hours, and the reaction was completed, centrifuged and washed to obtain mesoporous platinum-nickel nanoparticles, The product was dried at 50°C for 12 hours to obtain a mesoporous platinum-nickel nanoparticle oxygen reduction electrocatalyst.

[0048] The SEM image of the obtained mesoporous platinum nanoparticles can be found in Figure 8 , the linear sweep voltammetry and Tafel slope of the obtained mesoporous platinum nanoparticles at 1600 r...

Embodiment 3

[0051] A preparation method of mesoporous platinum-nickel nanoparticles oxygen reduction electrocatalyst, said method comprising the steps of:

[0052] (1) prepare the chloroplatinic acid and the nickel chloride solution that concentration is 40mM respectively, concentration is the ascorbic acid solution of 0.1M;

[0053] (2) Dissolve 30mg of F127 and 0.2g of potassium bromide in 1.25mL of water;

[0054] (3) Mix 1.125mL of chloroplatinic acid solution, 0.375mL of nickel chloride solution, 2mL of ascorbic acid solution and the solution of step (2), place in a water bath at 70°C for 12 hours, after the reaction is complete, centrifuge and wash The mesoporous platinum-nickel nanoparticles are obtained, and the product is dried at 40° C. for 10 hours to obtain the mesoporous platinum-nickel nanoparticles oxygen reduction electrocatalyst.

[0055] In this synthesis process, the concentration of chloroplatinic acid and nickel chloride solution is too high, the reaction rate is too...

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Abstract

The invention discloses a mesoporous nano platinum-nickel oxygen reduction electrocatalyst and a preparation method thereof. The preparation method comprises the following steps of: respectively preparing a chloroplatinic acid and a nickel chloride solution of which concentration is within 4-40 mM, and an ascorbic acid solution of which concentration is within 0.05-0.5 M; dissolving 5-50 mg of F127 and 0.1-0.5 g of potassium bromide in 0.1-3 mL of water; and mixing 0.5-2 mL of the chloroplatinic acid solution, 0-1 mL of the nickel chloride solution, and 0.1-5 mL of the ascorbic acid solution with the solution, placing in a water bath at 50-100 DEG C and reacting for 5-30 hours, ending the reaction, centrifuging, and washing to obtain mesoporous platinum-nickel nano-particles, and drying the product for 10-14 hours at 40-60 DEG C to obtain the mesoporous nano platinum-nickel oxygen reduction electrocatalyst. The preparation technology is flexible, and the prepared material has an excellent electrocatalysis oxygen reduction property under a low-temperature and an ordinary pressure.

Description

(1) Technical field [0001] The invention relates to a mesoporous nano-platinum-nickel oxygen reduction electrocatalyst and a preparation method thereof. The catalyst can be used for the research of electrocatalytic oxygen reduction reaction. (2) Background technology [0002] As an important member of noble metals, platinum has shown great potential in the field of catalysis due to its unique electronic structure. Platinum-based catalysts have demonstrated outstanding catalytic performance in chemical reactions, sensing, and fuel cells. However, some inevitable bottlenecks prevent the large-scale use of platinum-based catalysts, including low reserves of platinum, high cost of platinum-based catalysts, and poor catalytic stability of platinum-based catalysts in certain catalytic reactions. Therefore, it is very important to develop high catalytic activity and low platinum catalysts. Due to these limitations, researchers have extensively devoted themselves to the study of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89
CPCB01J23/892B01J35/33
Inventor 王亮余鸿杰王自强薛海荣许友王鸿静
Owner ZHEJIANG UNIV OF TECH
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