Preparation and application of transition metal phosphide/core-shell nitrogen-doped carbon nanofiber composite material

A carbon nanofiber and nanofiber technology is applied in the field of preparation and application of transition metal phosphide/core-shell nitrogen-doped carbon nanofiber composites, which can solve the problems of poor conductivity of transition metal phosphide and affecting applications.

Active Publication Date: 2019-07-26
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor electrical conductivity of transition metal phosphides hinders their application as electrocatalysts for HER and OER.

Method used

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  • Preparation and application of transition metal phosphide/core-shell nitrogen-doped carbon nanofiber composite material
  • Preparation and application of transition metal phosphide/core-shell nitrogen-doped carbon nanofiber composite material
  • Preparation and application of transition metal phosphide/core-shell nitrogen-doped carbon nanofiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1. Preparation of catalyst 300-ZIF-67@PPy-2@PAN-700-300

[0056] Take a certain amount of PAN (polyacrylonitrile), dissolve it in DMF, stir vigorously at room temperature to form a homogeneous solution with a mass concentration of 15 wt%, and then prepare the homogeneous solution into PAN ( Polyacrylonitrile) carbon nanofibers were vacuum-dried at 333 K to obtain PAN (polyacrylonitrile) carbon nanofibers;

[0057] Weigh 40 mg of PAN (polyacrylonitrile) carbon nanofibers, immerse in 50 mL of deionized water, and then add 0.6 g of FeCl to the solution 3 , 2 mg pyrrole (dissolved in 80 mL ethanol), stirred for 24 h, then washed with deionized water, and dried under vacuum at 333 K to obtain PPy-2@PAN;

[0058] Weigh 300 mg of PPy-2@PAN, 0.454 g Co(NO 3 ) 2 ·6H 2 O, add 20 mL of methanol and mix; stir the mixture for 1 h to form solution A; dissolve 0.513 g of 2-MIM (2-methylimidazole) in 20 mL of methanol to form solution B; add solution B to solution A Stir for 24 h....

Embodiment 2

[0070] 1. Preparation of catalyst 300-ZIF-67@PPy-2@PVP-700-300

[0071] Take a certain amount of PVP (polyvinylpyrrolidone), dissolve it in DMF, stir vigorously at room temperature to form a homogeneous solution with a mass concentration of 15 wt %; and then prepare the homogeneous solution into PVP ( Polyvinylpyrrolidone) carbon nanofibers were vacuum-dried at 333 K to obtain PVP (polyvinylpyrrolidone) carbon nanofibers;

[0072] Take 40 mg of PVP (polyvinylpyrrolidone) carbon nanofibers, soak them in 50 mL of deionized water, and then add 0.6 g of FeCl to the solution 3 , 2 mg pyrrole (dissolved in 80 mL ethanol), stirred for 24 h; washed several times with deionized water, and dried under vacuum at 333 K to obtain PPy-2@PVP;

[0073] Weigh 300 mg PPy-2@PVP, 0.454g Co(NO 3 ) 2 ·6H 2 O, add 20 mL methanol and mix; stir the mixture for 1 h to form solution A; dissolve 0.513 g 2-MIM (2-methylimidazole) in 20 mL methanol to form solution B; add solution B to solution A and s...

Embodiment 3

[0085] 1. Preparation of catalyst 300-ZIF-67@PPy-25@PAN-700-300

[0086] Take a certain amount of PAN (polyacrylonitrile), dissolve it in DMF (N, N-dimethylformamide), stir vigorously at room temperature to form a homogeneous solution with a mass concentration of 15 wt %; and process, the homogeneous solution is prepared into PAN (polyacrylonitrile) carbon nanofibers, and vacuum-dried at 333 K to obtain PAN (polyacrylonitrile) carbon nanofibers;

[0087] Weigh 40 mg of PAN (polyacrylonitrile) carbon nanofibers, immerse in 50 mL of deionized water, add 0.6 g of FeCl to the solution 3 , 25 mg pyrrole (dissolved in 80 mL ethanol), stirred for 24 hours. Then washed with deionized water and dried under vacuum at 333 K to obtain PPy-25@PAN;

[0088] Weigh 300 mg PPy-25@PAN, 0.454g Co(NO 3 ) 2 ·6H 2 O, add 20 mL methanol and mix. The mixture was stirred for 1 h to form solution A; 0.513 g of 2-MIM (2-methylimidazole) was dissolved in 20 mL of methanol to form solution B; soluti...

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Abstract

The invention provides a preparation method of a transition metal phosphide/core-shell nitrogen-doped carbon nanofiber composite material. The preparation method includes preparing a carbon nanofiberaccording to an electrospinning technique by taking a carbon-containing high-molecular polymer as a carbon source, coating the carbon nanofiber with an electroconductive polymer through surface polymerization, loading an MOF material onto the surface of the carbon nanofiber coated with the electroconductive polymer according to an in-situ growth method to obtain a precursor, and subjecting the precursor to high-temperature carbonizing and phosphating to obtain the transition metal phosphide/core-shell nitrogen-doped carbon nanofiber composite material. Activity test results show that the transition metal phosphide/core-shell nitrogen-doped carbon nanofiber composite material prepared by the preparation method has high electrocatalytic activity for total decomposition reaction of HER, OER and water and has high stability in acid-base media, thereby being a dual-functional catalyst that can replace precious metal and having a good development prospect in water electrolysis reaction.

Description

technical field [0001] The invention relates to the preparation of a transition metal phosphide / core-shell nitrogen-doped carbon nanofiber composite material, in particular to the preparation of a core-shell nitrogen-doped carbon nanofiber loaded transition metal phosphide based on electrospinning technology Composite materials are mainly used for electrolytic water hydrogen evolution reaction (HER) in acidic medium, electrolytic water oxygen evolution reaction (OER) in alkaline medium, and electrolytic water reaction in alkaline medium. Background technique [0002] Energy is the basis of human material life and an important guarantee for social development. With the rapid economic development, the demand for energy is increasing. At present, the main energy source is fossil fuel, but the burning of fossil fuel will cause environmental problems such as greenhouse effect and acid rain. Hydrogen has the advantages of higher combustion efficiency, abundant resources, and rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/06B01J35/10C25B1/04C25B11/06
CPCB01J27/24B01J35/0033B01J35/06B01J35/1009C25B1/04C25B11/091Y02E60/36
Inventor 童金辉李玉梁薄丽丽李文艳王复彤杨涛安俐蓉
Owner NORTHWEST NORMAL UNIVERSITY
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