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Nickel hydroxide electrocatalyst, preparation method, electrochemical activation method and application thereof

A technology of nickel hydroxide electrolysis and activation method, applied in electrodes, electrolysis components, electrolysis process and other directions, can solve the problems of limiting electrocatalytic reaction efficiency, time-consuming modification cost, poor electrocatalytic performance, etc., and achieves remarkable electrocatalytic performance. , the effect of improved electrocatalytic performance and low cost of raw materials

Active Publication Date: 2021-10-19
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the intrinsic electrocatalytic performance of nickel hydroxide material is relatively poor, resulting in its high overpotential, which limits the efficiency of electrocatalytic reaction. The existing research on the performance modification of nickel hydroxide material mainly focuses on the composition and microstructure control, the process is cumbersome, time-consuming and the cost of modification is high. A nickel hydroxide electrocatalyst, preparation method, electrochemical activation method and application thereof are provided.

Method used

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  • Nickel hydroxide electrocatalyst, preparation method, electrochemical activation method and application thereof
  • Nickel hydroxide electrocatalyst, preparation method, electrochemical activation method and application thereof
  • Nickel hydroxide electrocatalyst, preparation method, electrochemical activation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 1. Weigh 1.6mmol of Ni(NO 3 ) 2 ·6H 2 O, add 100mL deionized water to configure A solution; weigh 0.05mol Na 2 CO 3 and 0.05mol NaOH were added to 25mL deionized water to configure solution B.

[0038] 2. Add solution A to solution B, then stir for 30 minutes, pour evenly into two 100mL polytetrafluoroethylene liners, then put it into a reaction kettle, heat it to 120°C in an oven and keep it warm for 6 hours.

[0039] 3. After the reaction, cool down to room temperature, take out the mixture in the reactor, wash with deionized water and absolute ethanol for three times, and then dry it in an oven at 80°C. After drying, take it out and grind it.

[0040] 4. Disperse nickel hydroxide powder in a mixed solution of deionized water (490 μL), ethanol (490 μL) and perfluorosulfonic acid (40 μL), and ultrasonically disperse to obtain a suspension. Coated on an area of ​​1 x 1cm 2 carbon paper surface.

[0041] 5. Put the electrode coated with nickel hydroxide, graphite ...

Embodiment 2

[0045] 1. Weigh 0.5mmol of Ni(NO 3 ) 2 ·6H 2 O, add 2.5mL deionized water to dissolve, then add 2mmol CH 4 N 2 O, add 10 mL of 1,2-propanediol solution.

[0046] 2. Pour the above mixed solution into a 100mL polytetrafluoroethylene liner, then put it into the reaction kettle, heat it to 120°C in an oven and keep it warm for 6h.

[0047] 3. After the reaction, cool down to room temperature, take out the mixture in the reactor, wash with deionized water and absolute ethanol for three times, and then dry it in an oven at 80°C. After drying, take it out and grind it.

[0048] 4. Disperse the nickel hydroxide powder in a mixed solution of deionized water (490 μL), ethanol (490 μL) and perfluorosulfonic acid (40 μL), ultrasonically disperse to obtain a suspension, and apply it on an area of ​​1×1 cm 2 carbon paper surface.

[0049] 5. Put the electrode coated with nickel hydroxide, graphite rod, silver / silver chloride electrode into 1mol L -1 In the potassium hydroxide soluti...

Embodiment 3

[0052] 1. Weigh 1.6mmol of NiSO 4 ·6H 2 O, add 100mL deionized water to configure A solution; weigh 0.05molNa 2 CO 3 and 0.05mol NaOH, add 25mL deionized water to configure B solution.

[0053] 2. Add solution A to solution B, then stir for 30 minutes, pour evenly into two 100mL polytetrafluoroethylene liners, then put it into a reaction kettle, heat it to 120°C in an oven and keep it warm for 6 hours.

[0054] 3. After the reaction, cool down to room temperature, take out the mixture in the reactor, wash it with deionized water and absolute ethanol for 5 times, and then dry it in an oven at 80°C. After drying, take it out and grind it.

[0055] 4. Disperse nickel hydroxide powder in a mixed solution of deionized water (490 μL), ethanol (490 μL) and perfluorosulfonic acid (40 μL), and ultrasonically disperse to obtain a suspension. Coated on an area of ​​1 x 1cm 2 carbon paper surface.

[0056] 5. Put the electrode coated with nickel hydroxide, graphite rod, silver / silve...

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Abstract

The invention relates to the technical field of electrocatalysts, in particular to a nickel hydroxide electrocatalyst, a preparation method, an electrochemical activation method and application thereof. According to the invention, nickel hydroxide powder is synthesized from metal nickel salt and an alkaline compound through a hydrothermal method, then a conductive substrate is coated with the obtained nickel hydroxide powder to serve as an anode, a graphite rod is taken as a cathode, a silver / silver chloride electrode is taken as a reference electrode and is placed in a potassium hydroxide solution, a certain voltage for electrochemical activation is applied, and then the activated nickel hydroxide material is directly used for hydrogen production by electro-catalytic decomposition of water. The electrochemical activation method has the characteristics of simplicity in operation, low cost, suitability for modification of various electrocatalysts, good electrocatalytic performance after activation and the like, and has potential application prospects in the aspects of hydrogen production by electrolysis of water, electrochemical energy storage and the like.

Description

technical field [0001] The invention relates to the technical field of electrocatalysts, in particular to a nickel hydroxide electrocatalyst, a preparation method, an electrochemical activation method and an application thereof. Background technique [0002] The excessive consumption of fossil fuels has caused energy and environmental problems, and it is imminent to find clean and efficient new energy alternatives. Hydrogen energy is a clean, carbon-free, high-heat-of-combustion, and widely-used energy. It is the best choice to gradually replace traditional fossil energy, reduce greenhouse gas emissions, and develop renewable energy industries. In 2019, my country's hydrogen production is about 20 million tons, of which more than 90% of the hydrogen comes from various fossil fuel hydrogen production technologies, the energy consumption is high and the produced hydrogen contains a certain amount of impurities. Only 4% of hydrogen is obtained through electrolysis of water tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/075C25B1/04
CPCC25B1/04Y02E60/36
Inventor 杜海威胡杰朱储红袁玉鹏
Owner ANHUI UNIVERSITY