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Porous nitrogen-boron co-doped carbon-based oxygen reduction catalyst and preparation method and application thereof

A co-doping, carbon-based oxygen technology, applied in the field of electrocatalysis and energy materials, can solve the problem of high cost, achieve the effect of wide application, excellent oxygen reduction catalytic performance, and increase electrochemical performance

Active Publication Date: 2021-01-01
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently commonly used etchants are usually expensive and environmentally harmful reagents such as hydrofluoric acid and potassium hydroxide, so the development of efficient and simple methods to regulate edge sites still needs to be studied

Method used

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  • Porous nitrogen-boron co-doped carbon-based oxygen reduction catalyst and preparation method and application thereof
  • Porous nitrogen-boron co-doped carbon-based oxygen reduction catalyst and preparation method and application thereof
  • Porous nitrogen-boron co-doped carbon-based oxygen reduction catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]The synthesis method of porous nitrogen and boron co-doped carbon nanotube oxygen reduction catalyst includes the following steps:

[0040]Step 1: Firstly, 100 mg of polypyrrole nanotube precursor and 10 mg of sodium tetraphenylborate are placed in a mortar and thoroughly ground for more than 15 minutes and mixed to obtain mixture A;

[0041]Step 2: Transfer the mixture A to the corundum boat and put it in the tube furnace, under the protection of argon hydrogen (5wt%), raise it from room temperature to 900°C at a heating rate of 2°C / min and keep it for 2 hours, after it is completely carbonized Naturally lower to room temperature to obtain material B;

[0042]Step 3: Wash material B with deionized water until the filtrate is neutral, and then transfer it to a 60℃ blast drying oven to dry for 12 hours, such asfigure 1 As shown, the target product porous nitrogen and boron co-doped carbon nanotube oxygen reduction catalyst is obtained;

[0043]Step one in the above implementation case is o...

Embodiment 2

[0049]The synthesis method of porous nitrogen and boron co-doped carbon nanotube oxygen reduction catalyst includes the following steps:

[0050]Step 1: First, put 100mg of peptone precursor and 20mg of sodium tetraphenylborate in a mortar and grind thoroughly for more than 15 minutes and mix to obtain mixture A;

[0051]Step 2: Transfer the mixture A to the corundum boat and put it in the tube furnace, under the protection of nitrogen gas, raise it from room temperature to 800°C at a heating rate of 5°C / min and keep it for 2 hours. After being completely carbonized, it will naturally drop to room temperature. Material B;

[0052]Step 3: Wash the material B with deionized water until the filtrate is neutral, and then transfer it to a 60°C blast drying oven to dry for 12 hours to obtain the target product porous nitrogen-boron co-doped carbon oxygen reduction catalyst.

Embodiment 3

[0054]The synthesis method of porous nitrogen and boron co-doped carbon nanotube oxygen reduction catalyst includes the following steps:

[0055]Step 1: First, put 100mg of peptone precursor and 15mg of sodium tetraphenylborate in a mortar and grind thoroughly for more than 15 minutes and mix to obtain mixture A;

[0056]Step 2: Transfer the mixture A to the corundum boat and put it in the tube furnace, under the protection of nitrogen gas, raise it from room temperature to 800°C at a heating rate of 5°C / min and keep it for 2 hours. After being completely carbonized, it will naturally drop to room temperature. Material B;

[0057]Step 3: Wash material B with deionized water until the filtrate is neutral, and then transfer it to a 60°C blast drying oven for 12 hours to obtain the target product porous nitrogen-boron co-doped carbon-oxygen reduction catalyst.

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Abstract

The invention belongs to the technical field of electro-catalysis and energy materials, and particularly relates to a porous nitrogen-boron co-doped carbon-based oxygen reduction catalyst and a preparation method and application thereof. The method comprises the following steps: 1) obtaining a mixed raw material, wherein the raw material comprises a nitrogen-containing carbon precursor and sodiumtetraphenylborate; 2) performing solid-phase synthesis on the raw material obtained in the step 1) to obtain a crude product; and 3) cleaning the crude product obtained in the step 2) to obtain the porous nitrogen-boron co-doped carbon-based oxygen reduction catalyst. According to the technical scheme, sodium tetraphenylborate is used as a raw material, sodium tetraphenylborate is used as a boronsource precursor and can also be used as a pore-forming agent, and the nitrogen-boron co-doped material with a porous structure can be obtained by using a simple solid-phase synthesis method.

Description

Technical field[0001]The invention belongs to the technical field of electrocatalysis and energy materials, and specifically relates to a carbon-based oxygen reduction catalyst co-doped with porous nitrogen and boron, and a preparation method and application thereof.Background technique[0002]Fuel cells and metal-air batteries are considered to be very promising renewable energy storage and conversion technologies due to their high theoretical energy density, intrinsic safety and environmental friendliness. However, the slow oxygen reduction reaction at the cathode severely limits the conversion efficiency of these energy technologies, which has become a bottleneck for their large-scale application. The current commercial oxygen reduction catalysts still rely on the precious metal platinum and its alloys. Pt / C is also recognized as the most effective oxygen reduction electrocatalyst. However, Pt has limited resources, high cost, and stability and anti-toxicity need to be improved. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/06
CPCH01M4/8878H01M4/9083H01M12/06H01M2004/8684Y02E60/50
Inventor 韩建涛魏鹏方淳
Owner HUAZHONG UNIV OF SCI & TECH
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