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Porous boron-doped carbon-loaded platinum nanoparticle catalyst based on electrostatic spinning technology, and preparation method and application thereof

An electrospinning technology, platinum nanoparticle technology, applied in chemical instruments and methods, physical/chemical process catalysts, textiles and papermaking, etc., can solve the problems of short life, high catalyst toxicity, poor stability, etc. Simple preparation conditions and good stability

Inactive Publication Date: 2019-11-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electrolysis of water to produce ozone is mainly under neutral or acidic conditions, using catalysts such as platinum, lead dioxide and tin dioxide, all of which have poor stability.
[0004] Therefore, the primary restrictive factors for the development of ozone production by electrolysis of water are the problems of high catalyst toxicity and short service life.

Method used

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  • Porous boron-doped carbon-loaded platinum nanoparticle catalyst based on electrostatic spinning technology, and preparation method and application thereof
  • Porous boron-doped carbon-loaded platinum nanoparticle catalyst based on electrostatic spinning technology, and preparation method and application thereof
  • Porous boron-doped carbon-loaded platinum nanoparticle catalyst based on electrostatic spinning technology, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of a flexible electrode catalyst based on boron-doped carbon supported platinum nanoparticles by electrospinning technology comprises the following steps:

[0032] 1) Dissolve 0.533 g of PVP in 180 ml of methanol, then add 6.25 ml of chloroplatinic acid aqueous solution with a concentration of 10 g / L and 13.75 ml of deionized water, and reflux in an oil bath at 100 °C for 3 h under nitrogen bubbling atmosphere conditions Afterwards, cool to room temperature first, then remove the solvent by rotary evaporation to a volume of 10ml, add acetone to the residue of rotary evaporation to obtain a cloudy mixture, and centrifuge to obtain a viscous precipitate;

[0033] 2) Take the viscous precipitate obtained in step 1), add 1 g polyacrylonitrile (molecular weight 150000), 0.5 g boric acid to 10 ml N,N-dimethylformamide, stir in an oil bath at 80 °C for 2-4 hours, and form homogeneous mixture;

[0034] 3) Transfer the mixture obtained in step 2) to a 10 mL syri...

Embodiment 2

[0044] To prepare a flexible electrode catalyst based on electrospinning technology boron-doped carbon-supported platinum nanoparticles, the preparation method steps are repeated in Example 1, the difference is: the boric acid in step 2) of Example 1 is replaced with the same quality Sodium borate, other operating steps are the same as in Example 1, and finally a porous boron-doped carbon-supported platinum nanoparticle catalyst is prepared.

[0045] Electrolysis of water to prepare ozone experiment:

[0046] During the preparation process of the membrane electrode anode in Example 1, the catalyst of Example 1 added is replaced by the catalyst prepared in Example 2 of the same quality, and the remaining operating conditions are the same as those in Example 1. The electrolysis of water produces ozone. The relationship between the ozone concentration and the reaction time is as follows Figure 4 shown.

Embodiment 3

[0048] To prepare a flexible electrode catalyst based on electrospinning technology boron-doped carbon-supported platinum nanoparticles, the preparation method steps are repeated in Example 1, the difference is: the boric acid in step 2) of Example 1 is replaced with the same quality Sodium borohydride, other operating steps are the same as in Example 1, and finally a porous boron-doped carbon-supported platinum nanoparticle catalyst is prepared.

[0049] Electrolysis of water to prepare ozone experiment:

[0050] In the preparation process of the membrane electrode anode of Example 1, the catalyst of Example 1 added is replaced by the catalyst prepared in Example 3 of the same quality, and the remaining operating conditions are the same as the electrolysis of water in Example 1 to prepare ozone. The catalytic reaction of electrolysis of water produces The relationship between the ozone concentration and the reaction time is as follows Figure 4 shown.

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Abstract

The invention discloses a porous boron-doped carbon-loaded platinum nanoparticle catalyst based on an electrostatic spinning technology, and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: adding a surfactant coated with platinum nanoparticles, a boron-containing compound and a high-molecular polymer into an organic solvent, and carrying out stirring at 60-80 DEG C for 2-4 hours to form a viscous mixed solution; transferring the obtained viscous mixed solution into an injector, and carrying out spinning under the conditions that a voltage is 14-18 kV and a propelling speed is 1-2.5 mL / h to obtain a blocky spun material; and oxidizing the obtained blocky spun material in an air atmosphere at 180-250 DEG C for 1-3 hours, andcarrying out high-temperature calcination on the obtained oxidized material in a high-purity gas atmosphere at 700-1000 DEG C for 2-4 hours so as to obtain the catalyst disclosed by the invention. The catalyst provided by the invention is low in preparation cost, has relatively high electrocatalytic activity and super-strong stability when applied to preparation of ozone through electrolysis of water, and obviously improves the current efficiency of the preparation of ozone through electrolysis of water.

Description

technical field [0001] The invention relates to a porous boron-doped carbon-supported platinum nanoparticle catalyst based on electrospinning technology, a preparation method and application thereof. Background technique [0002] With the rapid development of industrial technology and the continuous expansion of production scale, the problem of environmental pollution is becoming more and more serious. Organic industrial wind and water pollution has become one of the pollutants that have wide-ranging influence and serious harm in water quality and water treatment. Ozone is a strong oxidant with the highest oxidation potential among common oxidants. Therefore, ozone can effectively destroy most organic matter in water, remove the odor and color of water, and at the same time effectively kill bacteria and viruses in drinking water, sewage and air, and reduce itself to oxygen without secondary pollution. Therefore, many countries have used it to replace chlorine as a disinfect...

Claims

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Application Information

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IPC IPC(8): B01J27/24C25B1/13C25B11/06D01D5/00
CPCB01J27/24C25B1/13D01D5/0015C25B11/091B01J35/393B01J35/399B01J35/23B01J35/33
Inventor 钟兴郑海洋王建国
Owner ZHEJIANG UNIV OF TECH
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