A kind of hollow carbon tube composite material and its preparation method and application

A composite material and hollow carbon technology, applied in electrolytic components, electrodes, electrolytic processes, etc., can solve the problems of low efficiency of non-precious metal catalysts, power consumption bottlenecks, etc., and achieve good application prospects, short reaction time, and accelerated permeability. Effect

Active Publication Date: 2022-02-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the power consumption bottleneck of full hydrolysis is about 1.8 V, which is much higher than the theoretical value of 1.23 V, and the efficiency for non-precious metal catalysts is still low.

Method used

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  • A kind of hollow carbon tube composite material and its preparation method and application
  • A kind of hollow carbon tube composite material and its preparation method and application
  • A kind of hollow carbon tube composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of Co nanoparticle-loaded hollow carbon tube composite material Co / KF

[0024] (1) Take 2.0 g cotton (KF) and add it to 150 ml NaClO 2 (1 wt %) solution, magnetically stirred for 10 minutes, and then the suspension was refluxed at 120 °C for 4 h to remove the wax protective layer attached to the cotton surface, then separated by suction filtration, washed with distilled water several times, and dried overnight at 60 °C to obtain a hollow Carbon tube material KF.

[0025] (2) Take 0.9 g of the hollow carbon tube material KF prepared in step (1) and immerse in 10 ml of CoCl 2 (5 wt %) solution, the hollow carbon tube material KF completely absorbs CoCl 2 The solution was dried overnight at 60 °C and placed in a tube furnace in a hydrogen-argon mixture at 5 °C min -1 The heating rate was increased from room temperature to 800 °C and calcined for 4 h to obtain the final product Co / KF composite.

[0026] The prepared product Co / KF was characteriz...

Embodiment 2

[0027] Example 2: Preparation of Co nanoparticle-loaded hollow carbon tube composite material Co / KF

[0028] (1) Take 4.0 g cotton (KF) and add it to 300 ml NaClO 2 (2wt%) solution, after magnetic stirring for 10 minutes, the suspension was refluxed at 100 ° C for 5 h to remove the wax protective layer on the cotton surface, then separated by suction filtration, washed with distilled water for many times, dried at 50 ° C for 12 h to obtain the processed Hollow carbon tube material KF.

[0029] (2) Take 0.9 g of the hollow carbon tube material KF prepared in step (1) and immerse in 12ml of CoCl 2 (5 wt %) solution, the hollow carbon tube material KF completely absorbs CoCl 2 The solution was dried overnight at 70 °C and placed in a tube furnace in a hydrogen-argon mixture at 2 °C min -1 The heating rate was increased from room temperature to 900 °C and calcined for 3 h to obtain the final product Co / KF composite material.

Embodiment 3

[0030] Embodiment 3: Preparation of Co nanoparticle loaded hollow carbon tube composite material Co / KF

[0031] (1) Take 2.0 g cotton (KF) and add it to 150 ml NaClO 2 (3 wt %) solution, after magnetic stirring for 10 minutes, the suspension was refluxed at 150 °C for 3 h to remove the wax protective layer on the cotton surface, then separated by suction filtration, washed with distilled water several times, and dried overnight at 60 °C to obtain a good Hollow carbon tube material KF.

[0032] (2) Take 0.9 g of the hollow carbon tube material KF prepared in step (1) and immerse in 21 ml of CoCl 2 (3wt%) solution, the hollow carbon tube material KF completely absorbs CoCl 2 The solution was dried overnight at 60 °C and placed in a tube furnace in a hydrogen-argon mixture at 5 °C min -1 The heating rate was increased from room temperature to 700 °C and calcined for 5 h to obtain the final product Co / KF composite material.

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Abstract

The invention belongs to the technical field of material preparation, and in particular relates to a hollow carbon tube composite material and its preparation method and application. The invention uses a high-temperature calcination method to prepare the hollow carbon tube composite material loaded with Co nanoparticles. The raw material cotton forms a regular hollow carbon tube shape after high-temperature calcination, has a unique hollow structure, has a large surface area, and has a strong transmission property. qualitative ability. The transition metal Co is much cheaper than Pt, and Co has excellent adsorption capacity for both hydrogen ions and oxygen-containing intermediates. The prepared hollow carbon tube composite is a dual-functional high-activity electrocatalyst for OER and HER, which can accelerate the permeability of electrolyte on the surface of the catalyst, and can be used for electrocatalytic perhydrolysis in alkaline environment. It has a good application prospect in the field of energy and environment. The invention has the advantages of simple process, convenient operation, short reaction time, reduced energy consumption and production cost, convenient mass production, non-toxic and harmless, and meets the requirement of environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a hollow carbon tube composite material and its preparation method and application. Background technique [0002] With the increasingly severe global energy crisis, hydrogen energy has attracted attention due to its high energy density and clean and pollution-free properties. Among the existing hydrogen production technologies, water electrolysis provides a carbon-free, high-purity and sustainable hydrogen production route. In recent years, to avoid the use of expensive and scarce noble metal catalysts (such as Pt, Ir, and Ru) in water electrolysis, non-noble metal catalysts have been used for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). However, the power consumption bottleneck of perhydrolysis is about 1.8 V, which is much higher than the theoretical value of 1.23 V, and the efficiency for non-precious metal catalysts is still...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/091C25B11/065C25B1/04
CPCC25B1/04Y02E60/36
Inventor 李春梅洪士欢董红军宋宁肖梦雅朱达强左延
Owner JIANGSU UNIV
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