An efficient two-dimensional nitrogen heterocarbon material, a preparation method thereof and an application thereof in the field of energy conversion

An aza-carbon, high-temperature carbonization technology, applied in nanotechnology, electrical components, battery electrodes, etc. for materials and surface science, can solve problems such as the arrival of unfavorable active substances, and achieve high specific surface area, conducive to transmission, excellent The effect of electrocatalytic performance

Inactive Publication Date: 2019-01-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It should be pointed out that most of the active sites of conventional three-dimensional carbon materials are located in the walls of long-range mesopores, and the existence of long-range mesopores is not conducive to the arrival of active materials.

Method used

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  • An efficient two-dimensional nitrogen heterocarbon material, a preparation method thereof and an application thereof in the field of energy conversion
  • An efficient two-dimensional nitrogen heterocarbon material, a preparation method thereof and an application thereof in the field of energy conversion
  • An efficient two-dimensional nitrogen heterocarbon material, a preparation method thereof and an application thereof in the field of energy conversion

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Synthesis of two-dimensional silica materials

[0034] Weigh 4.6 parts by mass of P123 and add it to 116 parts by volume of an aqueous solution containing 0.522 parts by mass of graphene oxide, stir at room temperature until P123 is completely dissolved, then add 22.5 parts by volume of concentrated hydrochloric acid with a mass fraction of 37%, and continue stirring in a water bath at 37°C 2.5h, slowly add 9.4 parts by volume of tetraethyl orthosilicate dropwise, continue to stir vigorously for 25h, transfer to the reaction kettle, crystallize at 110°C for 20h, filter, wash, dry, and then roast at 550°C for 5h to remove the template agent, A two-dimensional silica material is obtained.

[0035] (2) Preparation of nitrogen-doped carbon catalyst

[0036] Weigh 3.2 parts by mass of o-phenanthroline dissolved in 25.0 parts by volume of ethanol and 25.0 parts by volume of 0.2M FeCl 2 Into the solution, 2.85 parts by mass of the above-mentioned two-dimensional silica w...

Embodiment 2

[0042] (1) Synthesis of two-dimensional silica materials

[0043] Weigh 4.6 parts by mass of P123 and add it to 116 parts by volume of an aqueous solution containing 0.261 parts by mass of graphene oxide, stir at room temperature until P123 is completely dissolved, then add 22.5 parts by volume of concentrated hydrochloric acid with a mass fraction of 37%, and continue stirring in a water bath at 37°C 2.5h, slowly add 9.4 parts by volume of tetraethyl orthosilicate dropwise, continue to stir vigorously for 25h, transfer to the reaction kettle, crystallize at 110°C for 20h, filter, wash, dry, and then roast at 550°C for 5h to remove the template agent, A two-dimensional silica material is obtained.

[0044] (2) Preparation of nitrogen-doped carbon catalyst

[0045] The method for preparing the nitrogen-doped carbon catalyst is the same as step (2) of Example 1.

[0046] The material characterization and electrochemical performance testing methods of the catalyst are the same ...

Embodiment 3

[0048] (1) Synthesis of two-dimensional silica materials

[0049] Weigh 2.3 parts by mass of P123 and add it to 116 parts by volume of an aqueous solution containing 0.522 parts by mass of graphene oxide, stir at room temperature until P123 is completely dissolved, then add 22.5 parts by volume of concentrated hydrochloric acid with a mass fraction of 37%, and continue stirring in a water bath at 37°C 2.5h, slowly add 9.4 parts by volume of tetraethyl orthosilicate dropwise, continue to stir vigorously for 25h, transfer to the reaction kettle, crystallize at 110°C for 20h, filter, wash, dry, and then roast at 550°C for 5h to remove the template agent, A two-dimensional silica material is obtained.

[0050] (2) Preparation of nitrogen-doped carbon catalyst

[0051] Weigh 2.5 parts by mass of o-phenanthroline dissolved in 20.0 parts by volume of ethanol and 20.0 parts by volume of 0.1M FeCl 2 Into the solution, 1.75 parts by mass of the above-mentioned two-dimensional silica w...

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Abstract

The invention belongs to the technical field of energy conversion, and discloses an efficient two-dimensional nitrogen heterocarbon material, a preparation method thereof and an application thereof inthe field of energy conversion, in particular, the application as an electric catalyst in oxygen reduction reaction and carbon dioxide electric reduction reaction. A method for prepare a high-efficient two-dimensional nitrogen heterocarbon material comprises that follow steps of: synthesizing two-dimensional silicon dioxide by adopting a double template, introducing a nitrogen-containing precursor into a silicon dioxide template, performing carbonizing at a high temperature, removing the silicon dioxide template, and obtaining the high-efficient two-dimensional nitrogen heterocarbon material.The invention also provides an efficient two-dimensional azacarbon material prepared by the method. The efficient two-dimensional nitrogen heterocarbon material has a unique two-dimensional mesoporous structure, which can not only fully expose the catalytic active sites, but also facilitate the transport of active species, showing excellent electrocatalytic performance, and can be used in electrochemical energy conversion and storage technology. In particular, the efficient two-dimensional nitrogen heterocarbon material is used as an electrocatalyst in oxygen reduction reaction in alkaline condition and carbon dioxide reduction reaction in alkaline condition.

Description

technical field [0001] The invention belongs to the technical field of energy conversion, and in particular relates to a high-efficiency two-dimensional nitrogen-assorted carbon material and its preparation method and application in the field of energy conversion, especially the application as an electrocatalyst in oxygen reduction reaction and carbon dioxide electroreduction reaction. Background technique [0002] Oxygen reduction reaction is a key step in the electrochemical process of energy conversion, which is mainly used in fuel cells and metal-air batteries. High-efficiency oxygen reduction reaction catalysts have always been considered as the key factor to solve fuel cells. Although platinum-based catalysts were widely used in fuel cells in the 1960s, their large-scale application was restricted due to the high price of platinum and the scarcity of resources. Therefore, it is necessary to develop new non-platinum group metal catalysts and even non-metal oxygen reduct...

Claims

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Application Information

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IPC IPC(8): H01M4/96B82Y30/00
CPCB82Y30/00H01M4/96Y02E60/50
Inventor 梁振兴朴金花余志鹏
Owner SOUTH CHINA UNIV OF TECH
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