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Preparation method of iron-doped nickel phosphide composite nitrogen-doped reduced graphene oxide electro-catalytic material

An electrocatalytic material and graphene technology, applied in the field of material chemistry, can solve the problems of low electrocatalytic water splitting performance and slow electrical conductivity.

Inactive Publication Date: 2020-04-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, its electrocatalytic water splitting performance is still limited by its low electrical conductivity and relatively slow water dissociation process.

Method used

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  • Preparation method of iron-doped nickel phosphide composite nitrogen-doped reduced graphene oxide electro-catalytic material
  • Preparation method of iron-doped nickel phosphide composite nitrogen-doped reduced graphene oxide electro-catalytic material
  • Preparation method of iron-doped nickel phosphide composite nitrogen-doped reduced graphene oxide electro-catalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of nitrogen-doped reduced graphene oxide

[0022] (a) 300 mg of graphene oxide was dissolved in 300 mL of deionized water, 1.5 g of melamine was added after ultrasonication for 5 h, and a light black solid was obtained by stirring and evaporating;

[0023] (b) Place the light black solid obtained in (a) in a tube furnace, heat it to 800°C in an inert atmosphere, keep it warm for 1 hour, then cool it to room temperature with the furnace, wash and dry it, and obtain nitrogen-doped reduced graphene oxide.

[0024] (2) Preparation of NiFe-LDH / NG:

[0025] (a) Disperse the obtained 30 mg of nitrogen-doped reduced graphene oxide by ultrasound for 5 h in 35 mL of deionized water, and add 0.833 mmol of NiCl 2 ·6H 2 O, 0.166mmol FeSO 4 ·7H 2 O, 10mmol urea and 5mmol NH 4 F Stir to a homogeneously mixed solution;

[0026] (b) Transfer the solution in (a) to the reaction kettle, then react at 120°C for 8 hours, centrifuge to obtain a dark green precipitate, w...

Embodiment 2

[0031] (1) Preparation of nitrogen-doped reduced graphene oxide

[0032] (a) 300 mg of graphene oxide was dissolved in 300 mL of deionized water, 1.5 g of melamine was added after ultrasonication for 5 h, and a light black solid was obtained by stirring and evaporating;

[0033] (b) Place the light black solid obtained in (a) in a tube furnace, heat it to 800°C in an inert atmosphere, keep it warm for 1 hour, then cool it to room temperature with the furnace, wash and dry it, and obtain nitrogen-doped reduced graphene oxide.

[0034] (2) Preparation of NiFe-LDH / NG:

[0035] (a) Disperse the obtained 30 mg nitrogen-doped reduced graphene oxide ultrasonically for 5 h in 35 mL deionized water, add 0.667 mmol NiCl 2 ·6H 2 O, 0.333mmol FeSO4 7H 2 O, 10mmol urea and 5mmol NH F are stirred to a uniformly mixed solution;

[0036] (b) Transfer the solution in (a) to the reaction kettle, then react at 120°C for 8 hours, centrifuge to obtain a dark green precipitate, wash the precipi...

Embodiment 3

[0041] (1) Preparation of nitrogen-doped reduced graphene oxide

[0042] (a) 300 mg of graphene oxide was dissolved in 300 mL of deionized water, 1.5 g of melamine was added after ultrasonication for 5 h, and a light black solid was obtained by stirring and evaporating;

[0043] (b) Place the light black solid obtained in (a) in a tube furnace, heat it to 800°C in an inert atmosphere, keep it warm for 1 hour, then cool it to room temperature with the furnace, wash and dry it, and obtain nitrogen-doped reduced graphene oxide.

[0044] (2) Preparation of NiFe-LDH / NG:

[0045] (a) Disperse 30 mg of nitrogen-doped reduced graphene oxide obtained by ultrasonication for 5 h in 35 mL of deionized water, and add 0.889 mmol of NiCl 2 ·6H 2 O, 0.111mmol FeSO4 7H 2 O, 10mmol urea and 5mmol NH F are stirred to a uniformly mixed solution;

[0046] (b) Transfer the solution in (a) to the reaction kettle, then react at 120°C for 8 hours, centrifuge to obtain a dark green precipitate, was...

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Abstract

The invention discloses a preparation method of an iron-doped nickel phosphide composite nitrogen-doped reduced graphene oxide electro-catalytic material, and the method comprises the following steps:1) dissolving graphene oxide, carrying out ultrasonic treatment to obtain a uniform graphene oxide solution, adding melamine, stirring, and evaporating to obtain a light black solid; 2) putting the light black solid into a tubular furnace, heating and preserving heat in an inert atmosphere, cooling to room temperature, washing and drying to obtain nitrogen-doped reduced graphene oxide; 3) dissolving the nitrogen-doped reduced graphene oxide in deionized water to obtain a nitrogen-doped reduced graphene oxide solution; 4) adding urea, NH4F, nickel chloride hexahydrate and ferrous sulfate heptahydrate into the nitrogen-doped reduced graphene oxide solution, and uniformly stirring; 5) transferring the solution into a reaction kettle, centrifuging after reaction to obtain a dark green precipitate, washing and drying to obtain a precursor material, and 6) heating the precursor material in an inert atmosphere, keeping the temperature, and cooling to room temperature to obtain the catalyst.The preparation method is simple, low in cost and excellent in catalytic performance.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a method for preparing an iron-doped nickel phosphide composite nitrogen-doped reduced graphene oxide electrocatalytic material. Background technique [0002] With the progress and development of society, the demand for materials and energy is becoming more and more abundant, and the consumption of fossil energy (coal, oil and natural gas) is increasing. As a non-renewable resource, fossil energy reserves are limited, and its depletion is inevitable. In addition, the use of fossil energy will produce a large amount of harmful substances and carbon dioxide, which will have a very adverse impact on the global climate and environment. Therefore, the production of clean, renewable and other environmentally friendly energy has become a problem that has attracted much attention and needs to be solved urgently. Hydrogen is considered to be an excellent alternative energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J27/24C25B1/04C25B11/06
CPCB01J27/24B01J27/1853C25B1/04C25B11/04B01J35/33Y02E60/36
Inventor 刘毅赵蓉杨梦雅王欢
Owner ZHEJIANG UNIV
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