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a load ni 3 Preparation method of Fe-based nitrogen-doped carbon nanocomposite and its resulting materials and applications

A nanocomposite material, nitrogen-doped carbon technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of time-consuming, cumbersome preparation process, low output, etc. Performance, high degree of graphitization, effect of promoting reaction

Active Publication Date: 2021-07-27
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of such materials is usually time-consuming, cumbersome, and the output is low.

Method used

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  • a load ni <sub>3</sub> Preparation method of Fe-based nitrogen-doped carbon nanocomposite and its resulting materials and applications
  • a load ni <sub>3</sub> Preparation method of Fe-based nitrogen-doped carbon nanocomposite and its resulting materials and applications
  • a load ni <sub>3</sub> Preparation method of Fe-based nitrogen-doped carbon nanocomposite and its resulting materials and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A nitrogen-doped carbon nanofiber, carbon nanotubes loaded with Ni 3 The preparation method of Fe material, comprises the following steps:

[0043] 1)Ni 2+ / Fe 3+ / PVP mixed sol preparation: weigh 1.0g PVP with 6ml DMF and 6ml C 2 h 5 OH solution mixed, adding 1.5mmol of Ni(NO 3 ) 2 ·6H 2 O with 0.5mmol Fe(NO 3 ) 3 9H 2 O solid metal nitrate; after mechanical stirring at room temperature for 12h, make it evenly mixed, you can get yellow-brown Ni 2+ / Fe 3+ / PVP sol;

[0044] 2) Preparation of nitrogen-doped carbon nanocomposites loaded with Ni by electrospinning 3 Fe composite material: the yellow-brown Ni obtained in step 1) 2+ / Fe 3+ / PVP sol, processed by electrospinning technology, the obtained solid carbon fiber film material is pre-oxidized in the air at 250°C for 3h, and then in N 2 Under the atmosphere, the temperature was raised to 600°C at a rate of 5°C / min for heat treatment, and kept at this temperature for 3 hours, and then cooled to room temp...

Embodiment 2

[0047] A nitrogen-doped carbon nanofiber, carbon nanotubes loaded with Ni 3 The preparation method of Fe material, comprises the following steps:

[0048] 1)Ni 2+ / Fe 3+ / PVP mixed sol preparation: weigh 0.8g PVP with 6ml DMF and 6ml C 2 h 5 OH solution mixed, adding 1.5mmol of Ni(NO 3 ) 2 ·6H 2 O with 0.5mmol Fe(NO 3 ) 3 9H 2 O solid metal nitrate; after mechanical stirring at room temperature for 12h, make it evenly mixed, you can get yellow-brown Ni 2+ / Fe 3+ / PVP sol;

[0049] 2) Preparation of nitrogen-doped carbon nanocomposites loaded with Ni by electrospinning 3 Fe composite material: the yellow-brown Ni obtained in step 1) 2+ / Fe 3+ / PVP sol, processed by electrospinning technology, the obtained solid carbon fiber film material is pre-oxidized in the air at 250°C for 3h, and then in N 2 Under the atmosphere, the temperature was raised to 600° C. at a rate of 5° C. / min for heat treatment, and kept at this temperature for 3 hours, and then cooled to room ...

Embodiment 3

[0051] A nitrogen-doped carbon nanofiber, carbon nanotubes loaded with Ni 3 The preparation method of Fe material, comprises the following steps:

[0052] 1)Ni 2+ / Fe 3+ / PVP mixed sol preparation: weigh 0.7g PVP with 6ml DMF and 6ml C 2 h 5 OH solution mixed, adding 1.5mmol of Ni(NO 3 ) 2 ·6H 2 O with 0.5mmol Fe(NO 3 ) 3 9H 2 O solid metal nitrate; after mechanical stirring at room temperature for 12h, make it evenly mixed, you can get yellow-brown Ni 2+ / Fe 3+ / PVP sol;

[0053] 2) Preparation of nitrogen-doped carbon nanocomposites loaded with Ni by electrospinning 3 Fe composite material: the yellow-brown Ni obtained in step 1) 2+ / Fe 3+ / PVP sol, processed by electrospinning technology, the obtained solid carbon fiber film material is pre-oxidized in the air at 250°C for 3h, and then in N 2 Under the atmosphere, the temperature was raised to 600° C. at a rate of 5° C. / min for heat treatment, and kept at this temperature for 3 hours, and then cooled to room ...

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Abstract

The invention discloses a loaded Ni 3 The preparation method of the nitrogen-doped carbon nanocomposite material of Fe and its obtained material and application thereof, the preparation method comprises the following steps: 1) preparing Ni 2+ / Fe 3+ / PVP mixed sol; 2) the Ni 2+ / Fe 3+ / PVP mixed sol is electrospun to obtain a solid carbon fiber film; 3) After the solid carbon fiber film is pre-oxidized in an air atmosphere at 200-300°C, the temperature is programmed to rise in an inert atmosphere at 400-1000°C. heat treatment, namely the load Ni 3 Nitrogen-doped carbon nanocomposites of Fe. The preparation method of the present invention is low in cost, simple and general, and the prepared material is a one-dimensional composite structure (carbon nanofiber and carbon nanotube), and Ni 3 Fe alloy nanoparticles are uniformly embedded in carbon nanofibers and carbon nanotubes. This material can be used as an electrocatalytic material for electrolysis of water and hydrogen evolution, and has high activity and excellent stability.

Description

technical field [0001] The invention relates to a loaded Ni 3 The preparation method of nitrogen-doped carbon nanocomposite material of Fe and the obtained material and application thereof belong to the technical field of alkaline hydrogen evolution reaction catalyst. Background technique [0002] With the rapid consumption of fossil energy and the increasingly prominent environmental pollution problems, people's urgent demand for clean, green and sustainable energy has been triggered. Hydrogen energy is an important form of energy to replace fossil fuels, because of its zero emissions and ultra-high energy density (143kJ kg -1 ), environmental friendliness, sustainable utilization and other advantages have been widely concerned. Compared with the traditional hydrogen production method, electrolysis of water to produce hydrogen (2H 2 O→2H 2 +O 2 ), due to the advantages of greenness, high efficiency, and large-scale production, it is considered to be a hydrogen producti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/00B01J35/10B01J37/08B01J37/12B01J37/16B01J37/34C25B1/04C25B11/091
CPCB01J27/24B01J35/0033B01J35/006B01J35/0093B01J35/10B01J37/082B01J37/084B01J37/12B01J37/16B01J37/342C25B1/04C25B11/04Y02E60/36
Inventor 徐林李同飞李鑫刘坤豪吕银洁孙冬梅唐亚文
Owner NANJING NORMAL UNIVERSITY
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