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Preparation method and application of transition metal single atom and nitrogen and phosphorus doped carbon spheres

A transition metal, nitrogen and phosphorus technology, applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of uncontrollable transition metal content and types of catalysts, low oxygen reduction performance of catalysts, complex processes, etc., to achieve environmental friendliness and high power Density, the effect of simplifying the preparation process

Pending Publication Date: 2021-09-17
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the preparation method of the present transition metal single atom and nitrogen-phosphorus doped catalyst has high cost, complex process, low oxygen reduction performance of the obtained catalyst, it is difficult to make the fuel cell widely used and the content of transition metal in the prepared catalyst is low. Uncontrollable types of problems

Method used

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  • Preparation method and application of transition metal single atom and nitrogen and phosphorus doped carbon spheres
  • Preparation method and application of transition metal single atom and nitrogen and phosphorus doped carbon spheres
  • Preparation method and application of transition metal single atom and nitrogen and phosphorus doped carbon spheres

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specific Embodiment approach 1

[0041] The preparation of a transition metal single atom and nitrogen and phosphorus co-doped carbon spheres is carried out in the following steps:

[0042] (1) Add 100ml of acetonitrile solution into a 250ml capacity beaker, then add 0.6g of hexachlorotripolyphosphazene and 0.4g of phloroglucinol, after it dissolves, add 1mg of manganese acetate and 2ml of triethylamine, then place the beaker In an ultrasonic cleaner, conduct ultrasonic reaction at a constant temperature of 40°C for 30 minutes (ultrasonic power is 200 W) and centrifuge the precipitate under the condition that the rotation speed is 5000 rpm and the time is 5 minutes. The finished precipitate was dried in an oven at 50°C for 6 hours to obtain a catalyst template.

[0043] (2) Put the catalyst template into the porcelain boat, then put it into the tube furnace, and vacuum the tube furnace to make the vacuum degree reach 9×10 -2 Pa, and then 60sccm of nitrogen gas was introduced, and then heated to 200°C, 400°C, a...

specific Embodiment approach 2

[0045] The preparation of a transition metal single atom and nitrogen and phosphorus co-doped carbon spheres is carried out in the following steps:

[0046] (1) Add 100ml of acetonitrile solution into a 250ml capacity beaker, then add 0.6g of hexachlorotripolyphosphazene and 0.4g of phloroglucinol, after it dissolves, add 5mg of ferric nitrate and 2ml of triethylamine, and then put the beaker Place it in an ultrasonic cleaner, conduct ultrasonic reaction at a constant temperature of 40°C for 30 minutes (ultrasonic power is 200 W), and then centrifuge the precipitate at a speed of 5000 rpm for 5 minutes. The precipitate after centrifugation was dried in an oven at 50° C. for 6 hours to obtain a catalyst template.

[0047] (2) Put the catalyst template into the porcelain boat, then put it into the tube furnace, and vacuum the tube furnace to make the vacuum degree reach 1×10 -3 Pa, and then 70sccm of argon gas was introduced, and then heated to 200°C, 400°C, and 600°C at a rate...

specific Embodiment approach 3

[0049] The preparation of a transition metal single atom and nitrogen and phosphorus co-doped carbon spheres is carried out in the following steps:

[0050] (1) Add 100ml of acetonitrile solution into a 250ml capacity beaker, then add 0.3g of hexachlorotripolyphosphazene and 0.2g of phloroglucinol, after it dissolves, add 1mg of cobalt nitrate and 1ml of triethylamine, and then put the beaker Place in an ultrasonic cleaner, conduct an ultrasonic reaction at a constant temperature of 40°C (ultrasonic power: 180W) for 30 minutes, and then centrifuge the precipitate at a speed of 5000 rpm for 5 minutes. Centrifuge the obtained precipitate three times with ethanol and deionized water respectively. The precipitate after centrifugation was dried in an oven at 50° C. for 6 hours to obtain a catalyst template.

[0051] (2) Put the catalyst template into the porcelain boat, then put it into the tube furnace, and vacuum the tube furnace to make the vacuum degree reach 9×10 -2 Pa, and t...

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Abstract

The invention relates to the technical field of preparation of battery catalysts, in particular to a preparation method and application of transition metal monatomic and nitrogen and phosphorus doped carbon spheres. The method comprises the following steps: (1) adding hexachlorotripolyphosphazene and phloroglucinol into a solvent, adding a transition metal source and triethylamine after the hexachlorotripolyphosphazene and the phloroglucinol are fully dissolved, separating precipitates under constant-temperature and ultrasonic conditions, and then drying the precipitates to obtain a catalyst template; and (2) carrying out carbonization treatment on the catalyst template to obtain the carbon spheres formed by transition metal doped nitrogen and phosphorus. The method is simple and low in cost, the elements in the prepared carbon spheres are uniformly distributed, the transition metal is in a monatomic distribution state, the content and the type of the transition metal source are adjustable, the catalytic activity of the product is high, and the carbon spheres can replace commercial Pt / C to serve as an oxygen reduction catalyst and can be applied to the fields of batteries, electrocatalysis, photocatalysis, new energy automobiles, energy storage and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of battery catalysts, in particular to a preparation method and application of carbon spheres doped with transition metal single atoms and nitrogen and phosphorus. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] In the continuous development of current industrial technology, the environmental pollution caused by the excessive exploitation and use of traditional fossil energy has become increasingly serious, which has become one of the inevitable problems for people. The development of new forms of energy and corresponding energy conversion devices has attracted increasing atte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/9041H01M4/9083H01M4/8878Y02E60/50
Inventor 李加杰邹善宝鲁跃刘训道董德华
Owner UNIV OF JINAN
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