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Nickel sponge/Ni9S8 composite material as well as preparation method and application thereof

A composite material, sponge nickel technology, applied in the field of sponge nickel/octasulfide nine nickel composite materials and its preparation, can solve the problems of high price, poor cycle stability, low natural abundance and other problems of noble metal catalysts, and achieve effective active reaction area, improved electrochemical performance, and the effect of large active reaction area

Active Publication Date: 2021-07-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high price, low natural abundance and poor cycle stability of noble metal catalysts hinder their development.

Method used

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  • Nickel sponge/Ni9S8 composite material as well as preparation method and application thereof
  • Nickel sponge/Ni9S8 composite material as well as preparation method and application thereof
  • Nickel sponge/Ni9S8 composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 1.243g of nickel acetate in 69mL of deionized water, stir until the solution becomes clear, then slowly add 6mL of hydrazine hydrate, and continue stirring until the solution becomes clear. Transfer the above solution to the lining of the hydrothermal reaction kettle, install the stainless steel shell, tighten it and place it in an oven at 150°C for 7 hours. After the reaction is over, after the reactor is cooled to room temperature, the nickel sponge grown in the lining is taken out. The dried nickel sponge sample is placed in a quartz boat, and then placed in the middle of the CVD tube furnace, while the bubbler is filled with an appropriate ethanol solution as a carbon source for the reaction. After the argon gas was introduced into the tube furnace to evacuate it, the mixture of argon gas (160 sccm) and hydrogen gas (20 sccm) was continuously fed in, and the temperature of the furnace was raised to 850°C within 40 minutes. Ethanol carbon source, the reacti...

Embodiment 2

[0036]Dissolve 1.343g of nickel acetate in 69mL of deionized water, stir until the solution becomes clear, then slowly add 7mL of hydrazine hydrate, and continue stirring until the solution becomes clear. Transfer the above solution to the inner lining of the hydrothermal reaction kettle, install the stainless steel shell, tighten it and place it in an oven at 180°C for 9 hours. After the reaction is over, after the reactor is cooled to room temperature of 25°C, the nickel sponge grown in the lining is taken out. The dried nickel sponge sample is placed in a quartz boat, and then placed in the middle of the CVD tube furnace, while the bubbler is filled with an appropriate ethanol solution as a carbon source for the reaction. After the argon gas was introduced into the tube furnace to evacuate it, the mixture of argon gas (165 sccm) and hydrogen gas (15 sccm) was continuously fed in, and the temperature of the furnace was raised to 950°C within 40 minutes. Ethanol carbon sourc...

Embodiment 3

[0039] Dissolve 1.343g of nickel acetate in 69mL of deionized water, stir until the solution becomes clear, then slowly add 7mL of hydrazine hydrate, and continue stirring until the solution becomes clear. Transfer the above solution to the lining of the hydrothermal reaction kettle, install the stainless steel shell, tighten it and place it in an oven at 185°C for 6 hours. After the reaction is over, after the reactor is cooled to room temperature of 25°C, the nickel sponge grown in the lining is taken out. The dried nickel sponge sample is placed in a quartz boat, and then placed in the middle of the CVD tube furnace, while the bubbler is filled with an appropriate ethanol solution as a carbon source for the reaction. After the argon gas was introduced into the tube furnace to evacuate, the mixture of argon gas (155 sccm) and hydrogen gas (25 sccm) was continuously fed in, and the temperature of the furnace was raised to 950°C within 40 minutes. Ethanol carbon source, the r...

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Abstract

The invention discloses a nickel sponge / Ni9S8 composite material, a preparation method thereof and application of the nickel sponge / Ni9S8 composite material as a hydrogen evolution electrocatalyst material. A graphene-coated nickel sponge support is prepared by a hydrothermal method and a CVD (chemical vapor deposition) method, and the Ni9S8 nanowire array electrode material is prepared by taking the nickel sponge support as a carrier by the hydrothermal method. The material has a large specific surface area, and the Ni9S8 nanowire array is loaded on the nickel sponge, so that the contact area between an electrolyte and a motor can be increased, a larger and more effective active reaction area can be provided, meanwhile, the electron conduction rate is increased, and the electrochemical performance is improved. The sponge nickel / Ni9S8 material has the characteristics of long cycle life and low overpotential, and has wide application prospects in the fields of mobile communication, electric automobiles, solar power generation, aerospace and the like.

Description

technical field [0001] The invention relates to the technical field of electrocatalyst materials, in particular to a sponge nickel / nine nickel octasulfide (Ni 9 S 8 ) composite materials and their preparation methods and applications as electrocatalysts. Background technique [0002] The current energy crisis is becoming more and more serious, and the development of renewable hydrogen energy has become the theme of the world today. Hydrogen is derived from water, and the degradation of water molecules into hydrogen gas driven by electric energy is an effective strategy for environmental protection. To reduce the use of electrical energy, advanced electrocatalysts need to be designed to reduce the overpotential. Currently, the noble metal platinum and its alloys exhibit very good catalytic properties. However, the high price, low natural abundance and poor cycle stability of noble metal catalysts hinder their development. Therefore, there is a need to develop advanced no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/077C25B11/061C25B11/031C25B1/04
CPCC25B1/04Y02P20/133
Inventor 邓盛珏李涯皓王秀丽涂江平
Owner ZHEJIANG UNIV
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