Nitrogen-doped nickel phosphide nano-flower, preparation method and applications thereof

A technology of nickel phosphide and nanoflowers, applied in chemical instruments and methods, phosphides, nanotechnology, etc., to achieve the effect of simple and easy process, high stability and regular shape

Active Publication Date: 2020-02-04
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the regulation of phosphide nanomaterials by metal cations has been extensively studied. However, it is still a great c

Method used

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  • Nitrogen-doped nickel phosphide nano-flower, preparation method and applications thereof
  • Nitrogen-doped nickel phosphide nano-flower, preparation method and applications thereof
  • Nitrogen-doped nickel phosphide nano-flower, preparation method and applications thereof

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Embodiment 1

[0037] A preparation method of nitrogen-doped nickel phosphide nanoflowers, comprising the following steps:

[0038] 1)Ni(OH) 2 Preparation of nanoflowers: Dissolve nickel nitrate in absolute ethanol, fully dissolve, add a mixed solution of oleylamine and ethanol during stirring, stir for 30 minutes, transfer to a 50mL reaction kettle, and conduct a hydrothermal reaction in an oven at 180°C for 15 hours. Centrifuged and dried to obtain Ni(OH) 2 nanoflowers;

[0039] 2) Preparation of NiO nanoflowers: Ni(OH) 2 The nanoflowers were placed in a porcelain boat, and in an air atmosphere, the temperature was programmed to rise to 300°C at 2°C / min for heat treatment, and kept at this temperature for 60 minutes, and then cooled to obtain NiO nanoflowers.

[0040] 3) Preparation of nitrogen-doped nickel phosphide nanoflowers: According to the mass ratio of NiO nanoflowers to sodium hypophosphite of 1:30 and the mass ratio of ammonium bicarbonate to 1:2, sodium hypophosphite, bicarbo...

Embodiment 2

[0042] A preparation method of nitrogen-doped nickel phosphide nanoflowers, comprising the following steps:

[0043] 1)Ni(OH) 2 Preparation of nanoflowers: Dissolve nickel nitrate in absolute ethanol, fully dissolve, add a mixed solution of oleylamine and ethanol during stirring, stir for 30 minutes, transfer to a 50mL reaction kettle, and conduct a hydrothermal reaction in an oven at 180°C for 15 hours. Centrifuged and dried to obtain Ni(OH) 2 nanoflowers;

[0044] 2) Preparation of NiO nanoflowers: Ni(OH) 2 The nanoflowers were placed in a porcelain boat, and in an air atmosphere, the temperature was programmed to rise to 300°C at 2°C / min for heat treatment, and kept at this temperature for 60 minutes, and then cooled to obtain NiO nanoflowers.

[0045] 3) Preparation of nitrogen-doped nickel phosphide nanoflowers: According to the mass ratio of NiO nanoflowers to sodium hypophosphite of 1:30 and the mass ratio of ammonium bicarbonate to 1:1, sodium hypophosphite, bicarbo...

Embodiment 3

[0047] A preparation method of nitrogen-doped nickel phosphide nanoflowers, comprising the following steps:

[0048] 1)Ni(OH) 2 Preparation of nanoflowers: Dissolve nickel nitrate in absolute ethanol, fully dissolve, add oleylamine and ethanol mixed solution during stirring, stir for 30min, transfer to a 50mL reaction kettle, and conduct a hydrothermal reaction in an oven at 180°C for 15h. Centrifuged and dried to obtain Ni(OH) 2 nanoflowers;

[0049] 2) Preparation of NiO nanoflowers: Ni(OH) 2The nanoflowers were placed in a porcelain boat, and in an air atmosphere, the temperature was programmed to rise to 300°C at 2°C / min for heat treatment, and kept at this temperature for 60 minutes, and then cooled to obtain NiO nanoflowers.

[0050] 3) Preparation of nitrogen-doped nickel phosphide nanoflowers: According to the mass ratio of NiO nanoflowers to sodium hypophosphite of 1:30 and the mass ratio of ammonium bicarbonate to 1:5, sodium hypophosphite, bicarbonate Ammonium a...

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Abstract

The invention discloses nitrogen-doped nickel phosphide nano-flower and a preparation method thereof, and applications of the nitrogen-doped nickel phosphide nano-flower as an electrocatalytic hydrogen evolution catalyst. The preparation method comprises: mixing a nickel salt as a metal source and oleylamine as a morphology guiding agent, carrying out a hydrothermal reaction, carrying out heat treatment on the hydrothermal reaction product in an air atmosphere, and carrying out heat treatment on the heat treatment product, a phosphorus source and a nitrogen source in an inert atmosphere to obtain the nitrogen-doped nickel phosphide nano-flower. Compared with the method in the prior art, the method disclosed by the invention is simple to operate and easy for large-scale production, and theprepared nitrogen-doped nickel phosphide nano-flower has advantages of optimized surface electronic structure, multiple active sites, good conductivity, high catalytic activity and the like.

Description

technical field [0001] The invention relates to a nitrogen-doped nickel phosphide nanoflower and its preparation method and application, belonging to the technical field of electrocatalytic hydrogen evolution catalysts. Background technique [0002] At present, the main sources of energy use are traditional fossil fuels, but due to the excessive consumption of fossil fuels, serious environmental pollution and the increasing demand for energy, people are forced to explore new energy sources to replace traditional fossil fuels. Hydrogen energy has attracted widespread attention because of its high energy density, abundant reserves, renewable and non-polluting environment. Among various hydrogen production methods (high-temperature cracking natural gas method, water gas method, etc.), hydrogen production by electrolysis of water has the advantages of simple operation, wide range of reactants, and pure products. At the same time, the oxygen produced by the anode can be used in a...

Claims

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Application Information

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IPC IPC(8): C01B25/08B82Y40/00B01J27/24B01J35/10B01J35/02C25B11/06C25B1/04
CPCB01J27/24B01J35/0033B01J35/02B01J35/10B82Y40/00C01B25/08C01P2004/30C25B1/04C25B11/075Y02E60/36
Inventor 徐林周光耀吴小妹林英姿赵明明唐亚文
Owner NANJING NORMAL UNIVERSITY
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