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Flexible three-dimensional porous nitrogen-doped carbon nanotube/cobalt phosphide composite material and preparation method and application thereof

A three-dimensional porous, nitrogen-doped carbon technology, applied in the direction of electrode shape/type, electrode, electrolysis process, etc., can solve the problems of reducing the active number of electrocatalysts, prone to agglomeration, weakening the catalytic performance of hydrogen evolution, etc., to achieve excellent hydrogen evolution catalysis Performance, Simplified Implementation Process, Excellent Cycling Stability Effect

Inactive Publication Date: 2018-12-21
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, due to the traditional preparation methods, such as solid state reaction, precipitation method, hydrothermal method, etc., cobalt phosphide is mostly in powder form, which is prone to agglomeration, which reduces the active number of electrocatalysts. amount of binder, which will weaken its hydrogen evolution catalytic performance

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  • Flexible three-dimensional porous nitrogen-doped carbon nanotube/cobalt phosphide composite material and preparation method and application thereof
  • Flexible three-dimensional porous nitrogen-doped carbon nanotube/cobalt phosphide composite material and preparation method and application thereof
  • Flexible three-dimensional porous nitrogen-doped carbon nanotube/cobalt phosphide composite material and preparation method and application thereof

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Embodiment 1

[0034] Embodiment 1: Provides a flexible three-dimensional porous nitrogen-doped carbon nanotube / cobalt phosphide composite material prepared according to the method of the present invention

[0035] Cut a piece of melamine sponge of 5 cm × 3 cm × 2 cm, ultrasonically clean it with ethanol for 15 min, and dry at 60°C; weigh 60 parts of 2-methylimidazole and 20 parts of cobalt nitrate hexahydrate, dissolve them in 20 parts of methanol respectively, and dissolve the above Mix the two solutions, ultrasonically disperse for 10 minutes, and at the same time put in a melamine sponge to fully impregnate and evenly absorb and then dry. Transfer the dried compound to an alumina ark crucible, place it in a tube furnace, and under the protection of Ar atmosphere, at 350 ° C Use 30 parts of sodium hypophosphite in the upper tuyere, phosphating by thermal decomposition and vapor deposition, and continue to heat up, carbonize at 700 ° C, cool to room temperature and place in a sample box for...

Embodiment 2

[0038]Cut a piece of melamine sponge of 5 cm × 3 cm × 2 cm, ultrasonically clean it with ethanol for 15 min, and dry at 60°C; weigh 60 parts of 2-methylimidazole and 20 parts of cobalt nitrate hexahydrate, dissolve them in 20 parts of methanol respectively, and dissolve the above Mix the two solutions, ultrasonically disperse for 10 minutes, and at the same time put in a melamine sponge to fully impregnate and evenly absorb and then dry. Transfer the dried compound to an alumina ark crucible, place it in a tube furnace, and under the protection of Ar atmosphere, at 350 ° C Use 30 parts of sodium hypophosphite to place in the upper tuyere, phosphating by thermal decomposition and vapor deposition, and continue to heat up, carbonize at 800 ° C, cool to room temperature and place in a sample box for collection.

[0039] The obtained flexible three-dimensional porous nitrogen-doped carbon nanotubes / cobalt phosphide composite has a specific surface area of ​​180.8 m 2 g -1 , with ...

Embodiment 3

[0041] Cut a piece of melamine sponge of 5 cm × 3 cm × 2 cm, ultrasonically clean it with ethanol for 15 min, and dry at 60°C; weigh 60 parts of 2-methylimidazole and 20 parts of cobalt nitrate hexahydrate, dissolve them in 20 parts of methanol respectively, and dissolve the above Mix the two solutions, ultrasonically disperse for 10 minutes, and at the same time put in a melamine sponge to fully impregnate and evenly absorb and then dry. Transfer the dried compound to an alumina ark crucible, place it in a tube furnace, and under the protection of Ar atmosphere, at 350 ° C Use 30 parts of sodium hypophosphite in the upper tuyere, phosphating by thermal decomposition and vapor deposition, and continue to heat up, carbonize at 900 ° C, cool to room temperature and place in a sample box for collection.

[0042] The resulting flexible three-dimensional porous nitrogen-doped carbon nanotubes / cobalt phosphide composites exhibit a unique structure in which carbon nanotubes are compos...

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Abstract

The invention discloses a flexible three-dimensional porous nitrogen-doped carbon nanotube / cobalt phosphide composite material and a preparation method and application thereof. According to the flexible three-dimensional porous nitrogen-doped carbon nanotube / cobalt phosphide composite material and the preparation method and application thereof, low-cost commercial melamine sponges are used as a three-dimensional carbon material skeleton template, a zeolite imidazole structure metal organic framework is used as a cobalt source, phosphorization is carried out by a low-temperature vapor deposition method, and the flexible three-dimensional porous nitrogen-doped carbon nanotube / cobalt phosphide composite material with high conductivity and a high specific surface area is obtained. The preparation process of the flexible three-dimensional porous nitrogen-doped carbon nanotube / cobalt phosphide composite material is relatively simple, the cost is low, and the preparation process is suitable for industrial application. The flexible three-dimensional porous nitrogen-doped carbon nanotube / cobalt phosphide composite material is used as an electrode material for hydrogen evolution catalysis ofelectrolyzed water, and has lower hydrogen evolution catalysis overpotential, a larger electrocatalytic active area and excellent cycle stability.

Description

technical field [0001] The invention relates to a flexible three-dimensional porous nitrogen-doped carbon nanotube / cobalt phosphide composite material and its preparation method and application, belonging to the technical field of new energy materials. Background technique [0002] As a new type of energy, hydrogen energy has a series of advantages such as high calorific value, recyclability, no pollution, and no greenhouse gas generation. It is considered an ideal clean energy. At present, the production of hydrogen energy mainly relies on electrolysis of water for hydrogen evolution, and its high overpotential seriously affects the energy conversion efficiency. The current commercial electrocatalysts based on precious metals such as platinum are too expensive and have poor stability, which affects their wide application in electrolysis of water and hydrogen evolution catalysis. [0003] As a typical transition metal compound, cobalt phosphide has the advantages of abundan...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/03C25B11/06
CPCC25B1/04C25B11/04C25B11/031Y02E60/36
Inventor 王延忠陈优刘月鑫王慧奇刘炜李莹张锦芳董英鸽杨金龙
Owner ZHONGBEI UNIV
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