Preparation method for electro-catalysis hydrogen evolution copper nanometer particles/carbon nanofiber hybrid materials

A technology of carbon nanofibers and hybrid materials, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem of difficulty in preparing dispersion, unstable copper nanoparticles, and easy oxidation Copper oxide and other problems, to achieve the effect of abundant raw materials, cheap raw materials, and good dispersion

Active Publication Date: 2016-11-23
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, nano-scale catalysts represented by transition metal elements such as copper are rarely used in the field of electrocatalytic hydrogen production. One is that it is difficult to prepare highly dispersed and small-sized nanoparticles; the other is that copper nanoparticles are very unstable. Easily oxidized to cupric oxide or cuprous oxide

Method used

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  • Preparation method for electro-catalysis hydrogen evolution copper nanometer particles/carbon nanofiber hybrid materials
  • Preparation method for electro-catalysis hydrogen evolution copper nanometer particles/carbon nanofiber hybrid materials
  • Preparation method for electro-catalysis hydrogen evolution copper nanometer particles/carbon nanofiber hybrid materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve 1.5 grams of polyvinyl alcohol (PVA) powder in deionized water to form an aqueous solution with a mass concentration of 12%, then slowly add 0.075 grams of copper chloride to the above solution, and keep stirring until the solution is evenly mixed. A precursor solution containing copper salt and polyvinyl alcohol polymer is obtained. Move the prepared precursor solution to a 10mL syringe, and fix the syringe on the micropump injector. The needle of the syringe is connected to the positive pole of the high-voltage DC power supply, and the collection plate covered with aluminum foil is connected to the negative pole of the high-voltage DC power supply. The distance between the collection plate and the needle is 12 cm, the injection speed of the micropump is 0.3 mL / h, the positive voltage is set to 15 kV, and the negative voltage is set to 1.0 kV. The composite nanofibers of copper salt and polyvinyl alcohol can be collected on the collecting plate; the composite ...

Embodiment 2

[0033] Take 2.0 grams of polyacrylonitrile (PAN) powder and dissolve it in N,N-dimethylformamide solution to form a solution with a mass concentration of 10%, then slowly add 0.075 grams of copper nitrate to the above solution, and keep stirring Until the solution is uniformly mixed, a precursor solution containing copper salt and polyacrylonitrile polymer can be obtained. Move the prepared precursor solution to a 10mL syringe, and fix the syringe on the micropump injector. The needle of the syringe is connected to the positive pole of the high-voltage DC power supply, and the collection plate covered with aluminum foil is connected to the negative pole of the high-voltage DC power supply. The distance between the collection plate and the needle is 15 cm, the injection speed of the micropump is 0.6 mL / h, the positive voltage is set to 12 kV, and the negative voltage is set to 2.0 kV. The composite nanofibers of copper salt and polyacrylonitrile can be collected on the collecti...

Embodiment 3

[0035]Take 1.5 grams of polyvinylpyrrolidone (PVP) and dissolve the powder in N,N-dimethylformamide solution to make a solution with a mass concentration of 10%, then slowly add 0.075 grams of copper sulfate to the above solution, and keep stirring Until the solution is uniformly mixed, a precursor solution containing copper salt and polyvinylpyrrolidone polymer can be obtained. Move the prepared precursor solution to a 10mL syringe, and fix the syringe on the micropump injector. The needle of the syringe is connected to the positive pole of the high-voltage DC power supply, and the collection plate covered with aluminum foil is connected to the negative pole of the high-voltage DC power supply. The distance between the collection plate and the needle is 10 cm, the injection speed of the micropump is 0.5 mL / h, the positive voltage is set to 17 kV, and the negative voltage is set to 1.5 kV. The composite nanofibers of copper salt and polyvinylpyrrolidone can be collected on the...

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Abstract

The invention discloses a preparation method for electro-catalysis hydrogen evolution copper nanometer particles / carbon nanofiber hybrid materials. The static spinning technology is used for preparing composite nanometer fiber of copper salt and high-molecular polymer, and then the chemical vapor deposition method is used for calcination to obtain carbon nanofiber loaded with copper nanometer particles. The method is simple in technological process and low in preparation cost, the obtained copper nanometer particles are uniform in distribution and small in particle size, the catalysis activity is excellent, and the stability and repeatability are good.

Description

technical field [0001] The invention relates to a method for preparing nanofibers, in particular to a method for preparing copper nanoparticle / carbon nanofiber hybrid materials used for electrocatalytic hydrogen evolution. Background technique [0002] Electrocatalytic hydrogen evolution has attracted extensive attention as a simple and efficient method for producing hydrogen. As we all know, platinum and platinum-based materials are the best electrocatalytic hydrogen evolution materials, but due to the lack of resource reserves and high prices, they cannot be used commercially in large quantities, so how to improve the catalytic activity of electrode materials while reducing the overpotential of hydrogen evolution and improving The stability and durability of materials are the focus and key points of electrocatalytic hydrogen evolution. In recent years, there have been more and more studies on the electrocatalytic hydrogen evolution of transition metal chalcogenides, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J35/06B01J31/06C25B11/06C25B11/12C25B1/04
CPCC25B1/04B01J23/72B01J31/069B01J35/06C25B11/043Y02E60/36
Inventor 杜明亮王娟朱罕张明姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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