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Composite metal hydroxide as well as preparation method and application thereof

A hydroxide and composite metal technology, applied in the field of electrocatalytic materials, can solve problems such as inability to be used in a large area, limited earth reserves, high price of precious metal catalysts, etc., to achieve suitable mass production, controllable coating thickness, and superior catalysis active effect

Active Publication Date: 2018-11-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalysts currently used for OER are mainly IrO 2 or RuO 2 , but the high price of these noble metal catalysts and the limited earth reserves prevent them from being used on a large scale, and the development of non-noble metal catalysts has become a research hotspot in this field

Method used

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  • Composite metal hydroxide as well as preparation method and application thereof
  • Composite metal hydroxide as well as preparation method and application thereof
  • Composite metal hydroxide as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Dissolve 10 mmol of nickel sulfate, 5 mmol of iron sulfate, and 10 mmol of copper sulfate in 100 mL of deionized water, stir well, add ammonia water, and set aside. Prepare saturated sodium carbonate and sodium bicarbonate buffer solution, pour the spare metal salt solution into the buffer solution, stir evenly, and pour into the electrolytic tank. Cut 1*2cm of foamed nickel as the substrate, and switch on the anode after sufficient cleaning, and pass in 10mA / cm 2 The current is taken out after 10 minutes, rinsed three times with absolute ethanol, rinsed three times with deionized water, and dried at 100°C to obtain the nano-layered nickel-iron-copper hydroxide OER catalyst.

Embodiment 2

[0036] Dissolve 10mmol nickel nitrate, 5mmol ferric nitrate, and 10mmol copper nitrate into 100mL deionized water, stir well, add disodium edetate, and set aside. Prepare sodium carbonate and sodium bicarbonate buffer solution (sodium carbonate 10.3 g, sodium bicarbonate 1.2 g), pour the spare metal salt solution into the buffer solution, stir evenly, and pour it into the electrolytic tank. Cut 1*2cm of foamed nickel as the substrate, and switch on the anode after sufficient cleaning, and pass in 10mA / cm 2 The current is taken out after 10 minutes, rinsed three times with absolute ethanol, rinsed three times with deionized water, and dried at 100°C to obtain the nano-layered nickel-iron-copper hydroxide OER catalyst.

Embodiment 3

[0038] Dissolve 20 mmol nickel nitrate, 5 mmol ferric nitrate, and 20 mmol copper nitrate in 100 mL deionized water, stir well, add ammonia water, and set aside. Prepare saturated sodium carbonate and sodium bicarbonate buffer solution, pour the spare metal salt solution into the buffer solution, stir evenly, and pour into the electrolytic tank. Cut 1*2cm of foamed nickel as the substrate, and switch on the anode after sufficient cleaning, and pass in 10mA / cm 2 The current is taken out after 10 minutes, rinsed three times with absolute ethanol, rinsed three times with deionized water, and dried at 100°C to obtain the nano-layered nickel-iron-copper hydroxide OER catalyst.

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Abstract

The invention discloses a composite metal hydroxide as well as a preparation method and application thereof. The preparation method comprises the following steps of dissolving soluble nickel salt, copper salt and ferric salt in water, adding a complexing agent, preparing an alkaline buffer solution, and synthesizing the composite metal hydroxide in one step by adopting an anode electrodeposition method. The composite metal hydroxide is a transitional metal material, the reserves of raw materials are abundant, the composite metal hydroxide is low in price, easy to obtain and prepare, low in cost and suitable for large-scale production; compared with a single catalyst, the composite metal hydroxide has higher catalytic efficiency, more stable performance and superior OER catalytic activity.

Description

Technical field [0001] The invention relates to a composite metal hydroxide and a preparation method and application thereof, in particular to a nickel-iron-copper hydroxide composite material with high-efficiency electrocatalytic oxygen reduction activity, belonging to the technical field of electrocatalytic materials. Background technique [0002] With the rapid development of human society, fossil energy such as coal and petroleum is constantly being consumed, and the energy problem has become increasingly serious. And the consumption of these fossil energy sources has caused a series of environmental problems. In order to better face energy issues, the development of green and sustainable clean energy has become increasingly important. Among them, hydrogen energy has great application prospects as green and clean energy. Hydrogen production by electrocatalytic water cracking is an effective and green method for preparing hydrogen. Its simple process and short process are be...

Claims

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Application Information

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IPC IPC(8): C25D9/06C25B11/06C25B1/04
CPCC25B1/04C25D9/06C25B11/075Y02E60/36
Inventor 杨鹰张定李海普
Owner CENT SOUTH UNIV
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