Preparation method and application of bimetallic co-doped nickel phosphide nanosheet

A technology of co-doping and nickel phosphide, applied in the field of material chemistry, can solve the problems of reducing catalysts, health and environmental hazards, and achieve the effects of accelerated electron transfer, large surface area, and good electrochemical stability

Pending Publication Date: 2022-06-03
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The first issue is the availability of catalyst material resources, since we can no longer rely on noble metals (platinum, iridium and ruthenium) for simple electrolysis of water
The second concern concerns health and environmental hazards, the catalyst should at least be less harmful to the people using it and the environment
The third issue is the need for catalysts with long-term stability, which will reduce catalyst consumption

Method used

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  • Preparation method and application of bimetallic co-doped nickel phosphide nanosheet
  • Preparation method and application of bimetallic co-doped nickel phosphide nanosheet
  • Preparation method and application of bimetallic co-doped nickel phosphide nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 2.0 mmol (0.3 g) of ferrous sulfate (FeSO 4 ·4H 2 O), 0.5mmol (0.098g) manganese chloride (MnCl) 2 ·4H 2 O), 2.5mmol (0.72g) nickel nitrate (Ni(NO) 3 ) 2 ·6H 2 O), 5.0 mmol (0.185 g) ammonium fluoride (NH 4 F), 10mmol (0.6g) urea (CH 4 N 2 0) was added to 35 mL of deionized water, then sealed and stirred for 1 h to obtain a clear solution; a piece of foamed nickel (2×4 cm) and the above solution were placed in a reaction kettle with a polytetrafluoroethylene lining, and at a high temperature of 160 ° C The reaction was carried out for 8 hours, then cooled to room temperature, and the nickel foam was taken out, washed with deionized water and ethanol successively, and then put into a constant temperature blast oven for drying treatment to obtain the dried nickel foam; the dried nickel foam and sodium hypophosphite were (mass ratio 1:10) was placed in a tube furnace, sintered and annealed at 350 °C for 2 hours in an argon atmosphere to obtain manganese and i...

Embodiment 2

[0020] Weigh 1.5mmol (0.225g) of ferrous sulfate (FeSO 4 ·4H 2 O), 1.0mmol (0.196g) manganese chloride (MnCl) 2 ·4H 2 O), 2.0mmol (0.576g) nickel nitrate (Ni(NO) 3 ) 2 ·6H 2 O), 5.0 mmol (0.185 g) ammonium fluoride (NH 4 F), 10mmol (0.6g) urea (CH 4 N 20) was added to 35 mL of deionized water, then sealed and stirred for 1 h to obtain a clear solution; a piece of nickel foam (2 × 4 cm) and the above solution were placed in a reaction kettle with a Teflon lining, and at a high temperature of 160 ° C React for 8h, cool to room temperature, take out the nickel foam, wash with deionized water and ethanol successively, put it into a constant temperature blast oven for drying treatment, and obtain the nickel foam after drying; the nickel foam after drying and sodium hypophosphite ( The mass ratio of 1:10) was placed in a tube furnace, and sintered and annealed at 350 °C for 2 hours in an argon atmosphere to obtain manganese and iron co-doped nickel phosphide nanosheets, that...

Embodiment 3

[0022] Weigh 1.0 mmol (0.15 g) of ferrous sulfate (FeSO 4 ·4H 2 O), 1.5mmol (0.294g) manganese chloride (MnCl) 2 ·4H 2 O), 2.0mmol (0.576g) nickel nitrate (Ni(NO) 3 ) 2 ·6H 2 O), 5.0 mmol (0.185 g) ammonium fluoride (NH 4 F), 10mmol (0.6g) urea (CH 4 N 2 0) was added to 35 mL of deionized water, then sealed and stirred for 1 h to obtain a clear solution; a piece of nickel foam (2 × 4 cm) and the above solution were placed in a reaction kettle with a Teflon lining, and at a high temperature of 160 ° C React for 8h, cool to room temperature, take out the nickel foam, wash with deionized water and ethanol successively, put it into a constant temperature blast oven for drying treatment, and obtain the nickel foam after drying; the nickel foam after drying and sodium hypophosphite ( The mass ratio of 1:10) was placed in a tube furnace, and burned at 350 ° C for 2 hours in an argon atmosphere to obtain a bimetallic co-doped nickel phosphide nanosheet; the obtained bimetallic...

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Abstract

The preparation method comprises the following steps: dissolving a certain amount of manganese chloride, nickel nitrate, ferrous sulfate, ammonium fluoride and urea in a certain volume of deionized water, sealing by using a preservative film, stirring to obtain a clear and transparent solution, then putting a piece of foamed nickel into the clear and transparent solution, and uniformly stirring to obtain the bimetallic co-doped nickel phosphide nanosheet. Transferring the foamed nickel into a hydrothermal reaction kettle with a polytetrafluoroethylene lining, carrying out hydrothermal reaction, cooling, washing and drying to obtain dried foamed nickel; and putting the dried foamed nickel and sodium hypophosphite into a tubular furnace, sintering and annealing in an argon atmosphere, and cooling to obtain the bimetallic co-doped nickel phosphide nanosheet. An electrochemical test shows that the bimetallic co-doped nickel phosphide nanosheet prepared by the method has a wide application prospect when being used as an electrode material for an electro-catalysis water desorption oxygen evolution reaction. In the whole preparation process, the operation is simple, the raw material cost is low, the equipment investment is low, and the method is suitable for batch production.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a preparation method of bimetallic co-doped nickel phosphide nanosheets for improving the oxygen evolution reaction performance of electrolytic water. Background technique [0002] With the increase in energy demand and consumption of fossil fuels, hydrogen energy is considered to be one of the most fundamental energy carriers in the future economy. However, how to produce hydrogen on a large scale in an environmentally friendly and convenient way is an extremely urgent problem. Electrocatalytic splitting of water has emerged as one of the most promising strategies for hydrogen production because of its environmental friendliness, high purity, and no carbon emissions. Water splitting consists of two half-reactions: the hydrogen evolution reaction (HER: 2H + +2e - →H 2 ) and oxygen evolution reaction (OER:4OH) - →O 2 +2H 2 O+4e - ). For HER or OER reactions, ...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B1/04C01B25/08B82Y30/00B82Y40/00
CPCC25B11/04C25B1/04C01B25/08B82Y30/00B82Y40/00C01P2002/72C01P2004/03Y02E60/36
Inventor 辛星马桂园秦梦圆李星
Owner NINGBO UNIV
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