Reduced graphene modified nickel-iron hydroxyl oxide electrode as well as preparation method and application thereof

A graphene electrode and graphene technology, applied to the electrochemical variables of materials, material analysis by electromagnetic means, and measurement devices, can solve problems such as poor conductivity, improve conductivity, promote electrocatalytic oxygen evolution reaction, increase The effect of large specific surface area

Active Publication Date: 2017-11-07
SHENZHEN COUNTERBALANCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, similar to nickel-iron hydrotalcite, Ni 1-x Fe x OOH also has the defect of poor conductivity

Method used

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  • Reduced graphene modified nickel-iron hydroxyl oxide electrode as well as preparation method and application thereof
  • Reduced graphene modified nickel-iron hydroxyl oxide electrode as well as preparation method and application thereof
  • Reduced graphene modified nickel-iron hydroxyl oxide electrode as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing a reduced graphene-modified nickel-iron oxyhydroxide electrode, comprising the following steps:

[0033] (1) Place the FTO conductive glass on the rotating disk of the spin coater, pipette 100 μL of graphene oxide ethanol solution dropwise on the FTO conductive glass, and fix the coating area to 1cm 2 , the rotation speed of the rotating disc is 3000 rpm, and it is maintained for 30 seconds, which is used as a spin-coating cycle; repeat the spin-coating cycle 10 times to obtain a graphene oxide (GO / FTO) electrode; wherein, in the ethanol solution of graphene oxide The concentration of graphene oxide is 0.2g / L;

[0034] (2) Place the GO / FTO electrode obtained in step (1) in a tube furnace, raise the temperature to 500°C at a rate of 2°C / min in a nitrogen atmosphere, keep it for 2 hours, and cool it to room temperature naturally to obtain reduced graphite ene (RGO / FTO) electrode;

[0035] (3) With the RGO / FTO electrode obtained in step (2) as the wo...

Embodiment 2

[0037] A method for preparing a reduced graphene-modified nickel-iron oxyhydroxide electrode, comprising the following steps:

[0038] (1) Place the FTO conductive glass on the rotating disk of the spin coater, pipette 100 μL of graphene oxide ethanol solution dropwise on the FTO conductive glass, and fix the coating area to 1cm 2 , the rotation speed of the rotating disc is 3000 rpm, and it is maintained for 30 seconds, which is used as a spin-coating cycle; repeat the spin-coating cycle 10 times to obtain a graphene oxide (GO / FTO) electrode; wherein, in the ethanol solution of graphene oxide The concentration of graphene oxide is 0.2g / L;

[0039] (2) Place the GO / FTO electrode obtained in step (1) in a tube furnace, raise the temperature to 500°C at a rate of 2°C / min in a nitrogen atmosphere, keep it for 2 hours, and cool it to room temperature naturally to obtain reduced graphite ene (RGO / FTO) electrode;

[0040] (3) The RGO / FTO electrode obtained in step (2) is used as t...

Embodiment 3

[0043] A method for preparing a reduced graphene-modified nickel-iron oxyhydroxide electrode, comprising the following steps:

[0044] (1) Place the FTO conductive glass on the rotating disk of the spin coater, pipette 100 μL of graphene oxide ethanol solution dropwise on the FTO conductive glass, and fix the coating area to 1cm 2 , the rotation speed of the rotating disc is 3000 rpm, and it is maintained for 30 seconds, which is used as a spin-coating cycle; repeat the spin-coating cycle 10 times to obtain a graphene oxide (GO / FTO) electrode; wherein, in the ethanol solution of graphene oxide The concentration of graphene oxide is 0.2g / L;

[0045] (2) Place the GO / FTO electrode obtained in step (1) in a tube furnace, raise the temperature to 500°C at a rate of 2°C / min in a nitrogen atmosphere, keep it for 2 hours, and cool it to room temperature naturally to obtain reduced graphite ene (RGO / FTO) electrode;

[0046] (3) The RGO / FTO electrode obtained in step (2) is used as t...

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Abstract

The invention discloses a reduced graphene modified nickel-iron hydroxyl oxide electrode as well as a preparation method and application thereof. The preparation method comprises the following steps: coating conductive glass with an ethanol solution of graphene oxide by virtue of a spin-coating method, putting the conductive glass in a nitrogen atmosphere, heating to 450-550 DEG C, holding the temperature for 2-3 hours, and cooling to the room temperature, so as to obtain a reduced graphene electrode; constructing a three-electrode system by taking the reduced graphene electrode as a working electrode, a platinum sheet as a counter electrode and a saturated calomel electrode as a reference electrode, settling nickel-iron hydroxyl oxide by taking a water solution containing ferric trichloride, nickel chloride, sodium fluoride, potassium chloride and hydrogen peroxide as electrolyte through a cyclic voltammetry, taking out the working electrode, washing, and drying, so as to obtain the reduced graphene modified nickel-iron hydroxyl oxide electrode. By modifying the nickel-iron hydroxyl oxide electrode by virtue of reduced graphene, the conductivity of the nickel-iron hydroxyl oxide is improved, the specific surface area of the electrode is increased, reaction active sites are increased, and electro-catalysis oxygen evolution reaction is promoted.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, and in particular relates to a reduced graphene-modified nickel-iron oxyhydroxide electrode, a preparation method thereof, and an application in an electrocatalytic oxygen evolution reaction. Background technique [0002] Hydrogen energy is considered to be one of the most promising renewable energy sources. Researchers mainly focus on the energy conversion of the hydrogen economy. There are many ways to obtain hydrogen energy, including electrocatalysis and photoelectrocatalysis for water splitting. However, in these technologies, water splitting is the primary reaction, mainly including two half-reactions of cathodic hydrogen evolution (HER) and anodic oxygen evolution (OER). Compared with HER, OER is a four-electron transfer reaction. During the OER reaction, four protons need to be removed from water molecules to form O-O bonds. The kinetic process is slow, the reaction overp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 张晓凡张炳雁司玉冰张守仁孔维倩
Owner SHENZHEN COUNTERBALANCE TECH CO LTD
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