NiS/Ni(OH)2@PPy/Go nanosheet and methanol electrocatalysis modified electrode

A technology for modifying electrodes and nanosheets, which is applied in the field of electrochemical catalysis, can solve the problems of high price, carbon monoxide poisoning, and limit the application of platinum catalysts, and achieve the effects of fast reaction speed, large response current, and promotion of electrical conductivity

Inactive Publication Date: 2018-09-14
沈阳宏坤电气设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Platinum-based catalysts play an important role in direct alcohol batteries, but their disadvantages such as high price and susceptibility to carbon monoxide poisoning limit the application of platinum-based catalysts in DAFCs.

Method used

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  • NiS/Ni(OH)2@PPy/Go nanosheet and methanol electrocatalysis modified electrode
  • NiS/Ni(OH)2@PPy/Go nanosheet and methanol electrocatalysis modified electrode
  • NiS/Ni(OH)2@PPy/Go nanosheet and methanol electrocatalysis modified electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1 NiS / Ni(OH) 2 @PPy / GO nanosheets

[0035] (1) The preparation method is as follows:

[0036] 1) Preparation of GO nanosheets: Add 75ml of concentrated sulfuric acid, 1.6g of high-purity graphite and 2g of Na(NO) into a three-neck flask 3 and stir well, add 2g KMnO to the solution within one hour 4 , keep the system temperature below 5°C, let stand at room temperature for 7 days, dilute with 500mL warm water, add H 2 o 2 The solution was bright yellow, washed to neutral and then vacuum-dried to obtain GO nanosheets.

[0037] 2) PPy / GO nanosheets: Add 0.1g GO nanosheets to 100ml deionized water for ultrasonic dispersion, then add 0.1g pyrrole (Py) for ultrasonic dispersion, then add 1.2g FeCl 3 Ultrasonic, centrifugal washing and vacuum drying to obtain PPy / GO nanosheets.

[0038] 3) Preparation of NiS / Ni(OH)2@PPy / GO nanosheets: 10 mg PPy / GO was dispersed in 7 mL isopropanol and 35 mL water, and 25 mg Ni(NO 3 ) 2 , 10mg thiourea, 5mL ammonia water, stir e...

Embodiment 2

[0042] Example 2 Methanol Electrocatalytic Modification Electrode

[0043] (1) The preparation method is as follows:

[0044] 1) Take 1mg of dry NiS / Ni(OH) 2 For @PPy / GO nanosheets, add 1mL of ethanol and disperse ultrasonically for 20min to obtain a black suspension with a concentration of 1mg / mL, which is the composite modifier and is ready for use.

[0045]2) Electrode treatment: the glassy carbon electrode was first polished with 0.3 μM aluminum oxide suspension on a polishing cloth, then ultrasonically cleaned with secondary water, and then 0.05 μM aluminum oxide suspension Polish it to a mirror surface on a polishing cloth, and finally clean it ultrasonically with ethanol and secondary water, and dry it with high-purity nitrogen.

[0046] 3) Preparation of modified electrode: pipette 5 μL of the composite modifier prepared in step 1) with a microsampler and apply it onto the surface of a polished glassy carbon electrode, and dry it naturally in the air to obtain NiS / Ni...

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PUM

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Abstract

The invention relates to an NiS / Ni(OH)2@PPy / Go nanosheet and a methanol electrocatalysis modified electrode. The electrode comprises a glass carbon electrode and a polypyrrole / graphene oxide (PPy / GO)nanosheet, wherein the glass carbon electrode serves as a substrate electrode, and the nanosheet is modified by a compound of nickel sulfide and nickel hydroxide and is attached to the glass carbon electrode. Due to the compound of the nickel sulfide and the nickel hydroxide, the efficiency of reaction from methanol into water and carbon dioxide is enhanced, and the nanomaterial modified electrodehas higher response currents and higher linearity in terms of methanol electrocatalysis.

Description

technical field [0001] The invention belongs to the field of electrochemical catalysis, and in particular relates to a methanol electrocatalytic modification electrode and a preparation method and application thereof. Background technique [0002] Direct alcohol fuel cells (DAFCs) based on liquid fuels such as methanol and ethanol have the advantages of abundant sources, low operating temperature and high specific energy. broad interests of researchers. Among them, because direct methanol fuel cells have the advantages of low price, low noise, high energy density, non-toxicity, low working environment, and easy transportation, they have advantages over other fuels and can be applied to notebook computers, mobile phones and small Small portable batteries such as electric vehicles are a more promising fuel cell. [0003] Platinum-based catalysts play an important role in direct alcohol batteries, but their disadvantages such as high price and susceptibility to carbon monoxid...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M4/90B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/86H01M4/88H01M4/90H01M4/9016Y02E60/50
Inventor 茆卉曹振乾郭玺宋溪明
Owner 沈阳宏坤电气设备有限公司
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