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Loaded NiOOH electrode material, preparation method thereof and application of electrode material

An electrode material, nickel foam technology, applied in the field of supported NiOOH electrode material and its preparation, can solve the problems such as the activity of pure NiOOHOER that are rarely reported, and achieve a suitable for large-scale industrial production, large specific surface area, mild and controllable reaction conditions Effect

Inactive Publication Date: 2017-05-10
CAPITAL NORMAL UNIVERSITY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, nickel (oxygen) hydroxide (NiOOH) is Ni(OH) 2 Many studies have reported that adding Fe to NiOOH has good OER activity, however, few reports have studied the OER activity of pure NiOOH, which is very good for studying the catalytic mechanism of Ni in alkaline solution guiding role

Method used

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  • Loaded NiOOH electrode material, preparation method thereof and application of electrode material
  • Loaded NiOOH electrode material, preparation method thereof and application of electrode material
  • Loaded NiOOH electrode material, preparation method thereof and application of electrode material

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preparation example Construction

[0030] In the preparation method according to the present invention, the molar ratio of nickel (II) to dimethylglyoxime is 1:0.5 to 1:8, preferably 1:1 to 1:4, more preferably 1:1.5 to 1:3, The most preferred ratio is 1:2. When the molar ratio of nickel (II) to dimethylglyoxime is greater than 1:0.5, that is, the divalent nickel is excessive, it is easier to form nano-disc nickel on the surface of the foamed nickel, and it is stacked irregularly to cover the surface of the foamed nickel; When the molar ratio of nickel(II) to dimethylglyoxime is less than 1:8, that is, divalent nickel is insufficient, it is difficult to form regular nickel nanosheets. Considering the properties of nickel foam as the substrate, the molar ratio of nickel (II) to dimethylglyoxime is preferably 1:1.5 to 1:3, most preferably 1:2.

[0031] Hereinafter, the present invention will be described in detail. Before proceeding with the description, it should be understood that the terms used in this speci...

Embodiment 1

[0033] Embodiment 1: the preparation of the α-NiOOH nano sheet of nickel foam support

[0034]1) Pretreatment of nickel foam: at room temperature, ultrasonically ultrasonicate 1cm×3cm nickel foam in 3.0M HCl solution for 15min, then wash it several times with deionized water and absolute ethanol, and place it in the air for later use.

[0035] 2) Preparation of nickel (II) solution: weigh 0.5 mmol of NiCl 2 ·6H 2 O solid, dissolved in 20 mL deionized water.

[0036] 3) Preparation of dimethylglyoxime alcohol solution: Weigh 1 mmol of dimethylglyoxime solid and dissolve it in 20 mL of absolute ethanol.

[0037] 4) Take 8 mL of the solutions in the above steps 2) and 3) and add them to the polytetrafluoroethylene lining of the reaction kettle in turn. After stirring for 10 minutes, immerse the pretreated foamed nickel in it vertically, tighten the lid of the kettle, and put the reaction kettle Put it into an electric blast drying oven at 200°C and keep it for 6h.

[0038] 5)...

experiment Embodiment 1

[0063] Various electrical properties of the samples were measured using an electrochemical workstation (CHI 660D) from Beijing Huake Putian Technology Co., Ltd. In the three-electrode system, the prepared sample was used as the working electrode for linear sweep voltammetry, Tafel curve measurement, impedance spectrum measurement, active area measurement and stability measurement of the oxygen evolution reaction.

[0064] Electrochemical tests were performed using a three-electrode system, wherein the prepared sample was used as a working electrode, Hg / HgO was used as a reference electrode, Pt sheet was used as a counter electrode, and the electrolyte solution was 1.0M potassium hydroxide (pH=13.6).

[0065] According to the Nernst equation: E RHE =E Hg / HgO +0.098+0.059×pH (standard potential of mercury / mercury oxide electrode at 25°C: 0.098V)E RHE =E Hg / HgO +0.098+0.059×13.6=E Hg / HgO +0.9004

[0066] Linear sweep voltammetry (LSV) means that the potential applied to the ...

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Abstract

The invention discloses a loaded NiOOH electrode material, a preparation method thereof and an application of the electrode material. The electrode material of vertically-arranged alpha-NiOOH nano-sheets are loaded on foamed nickel is large in specific surface area and stable in electrochemical performance and has higher efficiency on electrolysis of water. The preparation method of the electrode material is simple in process, environmentally friendly, mild and controllable in reaction condition and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of preparation of electrode materials, in particular to a loaded NiOOH electrode material and its preparation method and application. Background technique [0002] Facing the increasingly severe environmental problems and energy crisis, exploring alternative energy storage and conversion systems is the key to solving these problems. Hydrogen energy is considered to be a clean, efficient, and renewable ideal energy source due to its ideal calorific value and green combustion products during combustion. Hydrogen production by electrolysis of water is an important means to achieve industrialized and cheap production of hydrogen. [0003] The water electrolysis process consists of two half-reactions: hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The hydrogen evolution reaction can be completed at a relatively low overpotential (η), while the oxygen evolution reaction process requires a higher ove...

Claims

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Application Information

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IPC IPC(8): C25B11/03C25B11/06C25B1/04C23C18/12
CPCC23C18/1204C25B1/04C25B11/031C25B11/075Y02E60/36
Inventor 田洋张琼
Owner CAPITAL NORMAL UNIVERSITY
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