Copper nanowire loaded CoNi nanosheet electrocatalyst as well as preparation method and application thereof

A technology of copper nanowires and electrocatalysts, applied in the field of electrocatalysis, can solve the problems of affecting the stability of catalytically active electrodes, restricting large-scale applications, and easy shedding of samples, so as to facilitate material transmission and increase the transmission of ions and electrons , Improve the effect of electrochemical activity

Pending Publication Date: 2021-08-06
LONGYAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, the existing catalytic materials still face the following problems: On the one hand, the existing catalytic materials are generally prepared into catalyst powder first, and then fixed on the surface of the electrode by a binder, the sample is easy to fall off, due to the binder The use of Pt affects the full contact between the catalyst and the electrolyte, increases the internal resistance, affects the catalytic activity and the stability of the electrode; Low reserves and other reasons limit its large-scale application in industrial and commercial production

Method used

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  • Copper nanowire loaded CoNi nanosheet electrocatalyst as well as preparation method and application thereof
  • Copper nanowire loaded CoNi nanosheet electrocatalyst as well as preparation method and application thereof
  • Copper nanowire loaded CoNi nanosheet electrocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Place copper foam in 2mol / L NaOH and 0.2mol / L (NH 4 ) 2 S 2 o 8 Soak in the mixture solution for 20min, take it out and rinse to get Cu(OH) 2 Nanowires. Then placed in 1mol / L Na 2 SO 4 The current density in the solution is -20mA / cm 2 , reduced by a constant current for 15 minutes, taken out, rinsed, and dried in a vacuum oven to obtain Cu nanowires. Then place the Cu nanowire electrode in 30mL concentration of 0.1mol / L CoCl 2 and 0.1mol / L NiCl 2 In the mixed solution, use cyclic voltammetry with a scanning range of 0.2 to -1.2V and a scanning speed of 25mV / s, scan 25 times, take it out, rinse it, and dry it in a vacuum oven at 60°C for 4 hours to obtain copper nanoparticles. Wire-supported CoNi nanosheet electrocatalysts.

[0035] The schematic diagram of the preparation of CoNi nanosheet electrocatalyst supported by copper nanowires in this example is shown in figure 1 ; The prepared material is analyzed, copper nanowires loaded CoNi nanosheet electrocataly...

Embodiment 2

[0040] Place copper foam in 2mol / L NaOH and 0.2mol / L (NH 4 ) 2 S 2 o 8 Soak in the mixture solution for 20min, take it out and rinse to get Cu(OH) 2 Nanowires. Then placed in 1mol / L Na 2 SO 4 The current density in the solution is -20mA / cm 2 , reduced by a constant current for 15 minutes, taken out, rinsed, and dried in a vacuum oven to obtain Cu nanowires. Then place the Cu nanowire electrode in 30mL concentration of 0.1mol / L CoCl 2 and 0.1mol / L NiCl 2 In the mixed solution, use cyclic voltammetry with a scanning range of 0.2 to -1.2V and a scanning speed of 25mV / s, scan 5 times, take it out, rinse it, and dry it in a vacuum oven at 60°C for 4 hours to obtain copper nanowires Supported CoNi nanosheet electrocatalysts.

Embodiment 3

[0042] Place copper foam in 2mol / L NaOH and 0.2mol / L (NH 4 ) 2 S 2 o 8 Soak in the mixture solution for 20min, take it out and rinse to get Cu(OH) 2 Nanowires. Then placed in 1mol / L Na 2 SO 4 The current density in the solution is -20mA / cm 2 , reduced by a constant current for 15 minutes, taken out, rinsed, and dried in a vacuum oven to obtain Cu nanowires. Then place the Cu nanowire electrode in 30mL concentration of 0.1mol / L CoCl 2 and 0.1mol / L NiCl 2 In the mixed solution, use cyclic voltammetry with a scanning range of 0.2 to -1.2V and a scanning speed of 25mV / s, scan 50 times, take it out, rinse it, and dry it in a vacuum oven at 60°C for 4 hours to obtain copper nanowires Supported CoNi nanosheet electrocatalysts.

[0043] The difference between embodiment 1 and embodiment 2 and embodiment 3 is that the number of scanning circles is different, adopt the same experimental method as embodiment 1 to the performance verification of embodiment 2-3 product, the resul...

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Abstract

The invention provides a copper nanowire loaded CoNi nanosheet electrocatalyst as well as a preparation method and application thereof, and belongs to the technical field of electrocatalysis. Foamy copper is used as a substrate material, copper hydroxide nanowires are generated through chemical oxidation reaction, then the copper nanowires are generated through electrochemical reduction, then CoNi nanosheets are loaded on the copper nanowires through electrochemical deposition, and the copper nanowire loaded CoNi nanosheet electrocatalyst is obtained. Foamy copper of a porous structure is used as a substrate material, after copper nanowires are generated on the surface of the foamy copper in situ, CoNi nanosheets are loaded, the surface area of the substrate is increased, good conductivity is kept, and meanwhile compared with a noble metal catalyst, Co and Ni transition metal catalysts are low in price, easy to prepare and excellent in performance.

Description

technical field [0001] The invention relates to the technical field of electrocatalysis, in particular to a CoNi nanosheet electrocatalyst supported by copper nanowires and a preparation method and application thereof. Background technique [0002] With the increasing energy crisis and environmental pollution, the development of new clean energy is imminent. Hydrogen is a clean energy with great application potential. Hydrogen production by electrolysis of water is a new type of hydrogen production technology, which has the advantages of high efficiency, environmental friendliness, and high safety, and has broad application prospects. At present, the key to electrolysis of water to produce hydrogen is to find new and efficient catalysts. However, in practical applications, the existing catalytic materials still face the following problems: On the one hand, the existing catalytic materials are generally prepared into catalyst powder first, and then fixed on the surface of t...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B11/031C25B11/054C25B11/061C25B1/04B82Y30/00B82Y40/00
CPCC25B1/04B82Y30/00B82Y40/00Y02E60/36
Inventor 郑瑞娟钟坚海张艳燕叶华欣
Owner LONGYAN UNIV
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