Preparation method of trimanganese tetraoxide/nitrogen-doped carbon nanotube composite material

A technology of trimanganese tetraoxide and nitrogen-doped carbon, which is applied to structural parts, electrical components, battery electrodes, etc., can solve the problems of poor conductivity, poor stability, and low catalytic performance, and achieve superior performance and good ORR performance Effect

Active Publication Date: 2020-09-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, platinum is considered to be one of the most active single-component electrocatalysts, but its high cost, poor stability, and easy poisoning limit its wide application.
Transition metal oxides such as tricobalt tetroxide, triferrous oxide, cuprous oxide, etc. have poor catalytic performance due to poor conductivity

Method used

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  • Preparation method of trimanganese tetraoxide/nitrogen-doped carbon nanotube composite material
  • Preparation method of trimanganese tetraoxide/nitrogen-doped carbon nanotube composite material
  • Preparation method of trimanganese tetraoxide/nitrogen-doped carbon nanotube composite material

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preparation example Construction

[0050] The present invention proposes a preparation method of trimanganese tetraoxide / nitrogen-doped carbon nanotube composite material, which specifically includes the following steps:

[0051] S1: Preparation of oxidized exfoliated carbon nanotubes;

[0052] S2: preparing the exfoliated carbon nanotubes in step S1 into a certain concentration of exfoliated carbon nanotube dispersion, and then adding a certain amount of concentrated ammonia water to make the dispersion solution into an alkaline dispersion solution with alkalinity;

[0053] S3: Make the manganese salt into a certain concentration of manganese salt solution, and add the manganese salt solution and nitrogen source to the alkaline dispersion solution in step S2, after stirring for a certain period of time, put the alkaline dispersion solution into a constant temperature ultrasonic The reactor device reacts for a certain period of time to obtain a dispersed solution;

[0054] S4: The dispersion solution in step S...

Embodiment 1

[0082]将100mL浓硫酸倒入500mL的圆底烧瓶中,然后加入1g多壁碳纳米管,通过磁力搅拌器搅拌得到酸性分散溶液。

[0083] 然后再向烧瓶中加入100mL的浓硫酸并搅拌,向分散液中缓慢地加入3g高锰酸钾,搅拌30min得到紫红色的混合物。

[0084] 将上述紫红色的混合物放置在80℃水浴中加热2h并保持搅拌,而后向混合物中缓慢加入20mL的过氧化氢和体积为300mL的冰块,得到黄色的分散溶液;将上述黄色溶液通过离心、10%的盐酸、二次水洗涤多次再离心,最终冷冻干燥得到剥离碳纳米管。

[0085] 往100mL的玻璃瓶中加入50mL 1mg / mL的剥离碳纳米管水分散液后,加入2mL的浓氨水并充分搅拌,再加入20mL 1mg / mL的高锰酸钾溶液,混合均匀后再滴加1.0mL的联氨,盖上玻璃瓶盖子后将玻璃瓶放置于超声反应器装置的80℃水浴溶液中超声反应10h。

[0086] 最后将反应得到的混合物通过反复抽滤、二次水洗涤多次,最后真空干燥得到氮掺杂剥离的碳纳米管负载四氧化三锰材料。

[0087] 实施例子2

[0088] 将300mL浓硫酸倒入装有2g多壁碳纳米管的500mL的圆底烧瓶中,通过磁力搅拌器搅拌得到分散溶液。

[0089] 向分散液中缓慢加入6g高锰酸钾,搅拌30min得到紫红色的混合物。

[0090] 将上述的紫红色混合物放置在80℃水浴中加热2h并保持搅拌,再向混合物中缓慢加入20mL的过氧化氢和体积为500mL的冰块,得到黄色溶液,将黄色溶液通过离心、10%的盐酸、二次水洗涤多次再离心,最后冷冻干燥得到剥离碳纳米管。

[0091] 往100mL的玻璃瓶中加入50mL 1mg / mL的剥离碳纳米管水分散液,加入2mL的浓氨水并充分搅拌,再加入15mL2mg / mL的高锰酸钠溶液,混合均匀后加入1.0g尿素,盖上玻璃瓶盖子后将玻璃瓶放置于超声反应器装置的85℃的水浴溶液中超声反应12h。

[0092] 最后将反应得到的混合物通过反复抽滤、二次水洗涤多次,最后真空干燥得到氮掺杂剥离的碳纳米管负载四氧化三锰材料。

[0093] 实施例子3

[0094] 将300mL浓硫酸倒入装有2g多壁碳纳米管的500mL的圆底烧瓶中,通过磁力搅拌器搅拌得到分散溶液。

[0095] 向...

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Abstract

The invention discloses a preparation method for preparing trimanganese tetraoxide / nitrogen-doped carbon nanotube composite material, which specifically comprises preparing exfoliated carbon nanotubes into a certain concentration of exfoliated carbon nanotube dispersion liquid, and then adding a certain amount of concentrated ammonia water to make the dispersion solution It becomes an alkaline dispersion solution with alkalinity; after the manganese salt is formulated into a manganese salt solution of a certain concentration, the manganese salt solution and nitrogen source are added to the alkaline dispersion solution, and after stirring for a certain period of time, the alkaline dispersion solution is put into The ultrasonic reactor device at a constant temperature reacts for a certain period of time to obtain a dispersed solution; finally, the dispersed solution is repeatedly suction-filtered, washed several times, and finally vacuum-dried to obtain a composite material of trimanganese tetraoxide / nitrogen-doped carbon nanotubes. The technical scheme of the invention can further optimize the preparation method and process of the transition metal oxide.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic functional materials, in particular to a preparation method of trimanganese tetraoxide / nitrogen-doped carbon nanotube composite material. Background technique [0002] Both fuel cells and metal-air batteries contain anode reactions and cathode reactions, and the kinetics of the cathode oxygen reduction reaction (ORR) is very slow, with a rate of about one-thousandth of the anode reaction, so too high an overpotential is a limitation. The bottleneck of fuel cell output power and energy efficiency. [0003] Commonly used ORR catalysts mainly include noble metals, such as platinum and rhodium. Among them, platinum is considered to be one of the most active single-component electrocatalysts, but its high cost, poor stability, and easy poisoning limit its wide application. Transition metal oxides such as tricobalt tetroxide, triiron tetroxide, cuprous oxide, etc. have poor catalytic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90
CPCH01M4/8647H01M4/9016H01M4/9083Y02E60/50
Inventor 施志聪黄宗雄古谢放刘军樊青录
Owner GUANGDONG UNIV OF TECH
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