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Nickel hydroxide/nickel disulfide/foam nickel composite and preparation method thereof, and application thereof

A technology of trinickel disulfide and nickel hydroxide, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of reduced overpotential and poor performance of catalytic electrolysis of water, and achieve excellent overall performance. Water-based electrolysis, simple preparation process, and good repeatability

Active Publication Date: 2019-04-19
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transition metal sulfides have a lot of efforts by scientists, such as shape optimization, heterostructure construction, defect construction and ion doping, which have reduced the overpotential of the material for catalytic electrolysis of water to a certain extent. But their performance is still a lot worse than that of precious metals, and their stability needs to be improved

Method used

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  • Nickel hydroxide/nickel disulfide/foam nickel composite and preparation method thereof, and application thereof
  • Nickel hydroxide/nickel disulfide/foam nickel composite and preparation method thereof, and application thereof
  • Nickel hydroxide/nickel disulfide/foam nickel composite and preparation method thereof, and application thereof

Examples

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Embodiment 1

[0046] A preparation method of nickel hydroxide / nickel disulfide / foam nickel composite, comprising the following steps:

[0047] (1) Place nickel foam in a 1:1 mixed solution of ethanol and acetone for ultrasonic cleaning to remove surface oil, then place nickel foam in 5mol L -1 Dry at 100°C after being treated in dilute hydrochloric acid solution for 5 minutes;

[0048] (2) Cut the dried nickel foam in step (1) into a size of 3cm×3cm, put it into a polytetrafluoroethylene-lined reactor with a capacity of 80mL, and dissolve 5mmol of thioacetamide in 50mL of aqueous solution solution 1; transfer solution 1 to the above reaction kettle, react at 160°C for 4 hours and then wash and dry to obtain nano-dry nickel disulfide that is longer than nickel foam. trunk-like Ni 3 S 2 / NF;

[0049] (3) the nickel nitrate hexahydrate of 1.5mmol is dissolved in the mixed solution of 10ml ethanol and 40mL water and then joins in the polytetrafluoroethylene liner, puts into the nano-trunk s...

Embodiment 2

[0051] A preparation method of nickel hydroxide / nickel disulfide / foam nickel composite, comprising the following steps:

[0052] (1) Place nickel foam in a 1:1 mixed solution of ethanol and acetone for ultrasonic cleaning to remove surface oil, then place nickel foam in 5mol L -1 Dry at 100°C after being treated in dilute hydrochloric acid solution for 5 minutes;

[0053] (2) Cut the dried nickel foam in step (1) into a size of 3cm×18cm, put it into a polytetrafluoroethylene-lined reactor with a capacity of 80mL, and dissolve 5mmol of thioacetamide in 50mL of aqueous solution solution 1; transfer solution 1 to the above reaction kettle, react at 160°C for 4 hours and then wash and dry to obtain nano-dry nickel disulfide that is longer than nickel foam. trunk-like Ni 3 S 2 / NF;

[0054] (3) the nickel nitrate hexahydrate of 1.5mmol is dissolved in the mixed solution of 10ml ethanol and 40mL water and then joins in the polytetrafluoroethylene liner, adds the Ni of the nano t...

Embodiment 3

[0056] A preparation method of nickel hydroxide / nickel disulfide / foam nickel composite, comprising the following steps:

[0057] (1) Place nickel foam in a 1:1 mixed solution of ethanol and acetone for ultrasonic cleaning to remove surface oil, then place nickel foam in 5mol L -1 Dry at 100°C after being treated in dilute hydrochloric acid solution for 5 minutes;

[0058] (2) Cut the dried nickel foam in step (1) into a size of 3cm×3cm, put it into a polytetrafluoroethylene-lined reactor with a capacity of 80mL, and dissolve 5mmol of thioacetamide in 50mL of aqueous solution solution 1; transfer solution 1 to the above reaction kettle, react at 160°C for 4 hours and then wash and dry to obtain nano-dry nickel disulfide that is longer than nickel foam. trunk-like Ni3 S 2 / NF;

[0059] (3) the nickel nitrate hexahydrate of 1.0mmol is dissolved in the mixed solution of 10ml ethanol and 40mL water and then joins in the polytetrafluoroethylene liner, adds the nano tree trunk sha...

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Abstract

The invention discloses a nickel hydroxide / nickel disulfide / foam nickel composite and a preparation method thereof, and application thereof. The composite is expressed in the form of Ni(OH)2 / Ni3S2 / NFand can be used as an electrode. In the electrode structure, the nano-stem-like Ni3S2 / NF is a conductive skeleton, and the Ni(OH)2 nanosheet is equivalent to a leaf and grows on the nano-stem-like Ni3S2 / NF skeleton. The heterointerface of Ni(OH)2 and Ni3S2 having a defect structure is the active center. The Ni(OH)2 / Ni3S2 / NF electrode can be used as a bifunctional catalyst, has excellent cathodic catalytic hydrogen evolution and anodic catalytic oxygen evolution reaction performance, and has high current long-term total electrolysis hydrogen production and oxygen production stability. Comparedwith noble metal catalysts such as Pt and RuO2, the catalyst synthesis method is simple, rich in raw materials and low in cost.

Description

technical field [0001] The invention belongs to the field of nanometer material preparation, in particular to a nickel hydroxide / nickel disulfide / foam nickel composite and its preparation method and application. Background technique [0002] The gradual reduction of fossil energy such as oil, coal and natural gas and the increasingly serious environmental pollution urgently require the application of green, clean and sustainable energy. Hydrogen energy is considered to be the most potential substitute for traditional energy in the 21st century. It has the advantages of high combustion value, no pollution, and sustainable production. In November 2017, the International Hydrogen Energy Committee clarified the future vision of hydrogen energy, pointing out that before 2050, through larger-scale popularization, hydrogen energy will account for about 20% of the total energy consumption, and by then the demand for hydrogen energy will reach the current level. 10 times the annual...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/86B01J27/043C25B1/04C25B11/06H01M4/90B82Y30/00
CPCH01M4/90H01M4/9016H01G11/24H01G11/30H01G11/86C25B1/04B82Y30/00B01J27/043C25B11/091B01J35/33Y02E60/36Y02E60/50
Inventor 袁定胜黎景卫
Owner JINAN UNIVERSITY
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