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Preparation method of nickel-iron hydrotalcite nanosheet-nickel foam assisted by acid vapor

A technology of foamed nickel and nickel molten iron, applied in nanotechnology, electrolysis components, electrodes and other directions, can solve the problems of inconvenient large-scale production, high pollution cost, high energy consumption, etc., and achieves improved electrocatalytic oxygen evolution activity, low cost, The effect of expanding production scale

Active Publication Date: 2021-10-15
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high energy consumption, high pollution, high cost and inconvenient large-scale production of high-performance nickel-iron hydrotalcite catalytic electrodes

Method used

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  • Preparation method of nickel-iron hydrotalcite nanosheet-nickel foam assisted by acid vapor
  • Preparation method of nickel-iron hydrotalcite nanosheet-nickel foam assisted by acid vapor
  • Preparation method of nickel-iron hydrotalcite nanosheet-nickel foam assisted by acid vapor

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Experimental program
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Embodiment 1

[0022] The preparation method of a kind of acid steam-assisted nickel-iron hydrotalcite nanosheet-nickel foam of the present embodiment is carried out according to the following steps:

[0023] a. Dissolve ferric chloride in deionized water to prepare a 25mmol / L ferric chloride solution, and soak the degreased nickel foam in the above ferric chloride solution. After immersion and ultrasonication for 5 minutes, the foam nickel Take it out, and dry it for 30 minutes at room temperature; the ratio of the foamed nickel area to the volume of the ferric chloride solution is 0.4cm 2 / ml;

[0024] B, the nickel foam after step a is processed is placed in acid-resistant container, and the open bottle that fills 5ml concentrated nitric acid solution is placed in this container to guarantee the acidic steam atmosphere in the airtight container;

[0025] c. Close the container in step b, then close the system again and keep it at 50°C for 12 hours. After cooling, open the closed containe...

Embodiment 2

[0027] The only difference between this embodiment and embodiment 1 is that the concentration of ferric chloride solution in step a is 15mmol / L.

Embodiment 3

[0029] The only difference between this embodiment and embodiment 1 is that in step b, 5 ml of concentrated sulfuric acid is placed in the open container.

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Abstract

The invention discloses a method for preparing nickel-iron hydrotalcite nanosheet-nickel foam assisted by acid vapor, and belongs to the field of electrocatalytic oxygen evolution electrode preparation under alkaline conditions. The method includes the following steps: after the nickel-based current collector is degreased with acetone, it is fully soaked in ferric chloride solution and ultrasonically treated for about 5 minutes, then taken out, and placed in an airtight acid-resistant container for vacuuming , and then fill the airtight container with a mixture of specific gas and acid vapor, and keep it sealed and placed at a certain temperature for 8-16 hours, and finally take out the nickel-based current collector, and wash it repeatedly with distilled water to obtain the nickel-iron hydrotalcite nanosheet array. Nickel electrode was used as the working electrode for alkaline electrocatalytic oxygen evolution process. The surface of the prepared nickel-catalyzed electrode is evenly covered with vertically distributed nickel-iron hydrotalcite nanosheet arrays. The electrode has excellent alkaline electrocatalytic oxygen evolution activity and has good stability under alkaline conditions.

Description

technical field [0001] The invention relates to the technical field of preparation of catalytic electrodes, in particular to a method for preparing acid vapor-assisted nickel-iron hydrotalcite nanosheet-nickel foam. Background technique [0002] With the rapid development of modern society, traditional fossil energy is the power pillar of modern society, and the reserves of fossil energy are decreasing day by day, but the demand for energy is indeed increasing under the demand of development, and the energy crisis is deepening. At the same time, fossil resources have also brought about increasingly serious environmental pollution problems in the process of energy conversion. For example, a large amount of SO will also be produced during the conversion of fossil energy to energy such as motion, heat, and electricity. 2 , NO x , PM 2.5 and other polluting substances. Efficient and clean sustainable energy conversion technology is the most important way to solve the above en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/031C25B11/052C25B11/061C25B11/075B82Y40/00
CPCB82Y40/00C25B1/04Y02E60/36
Inventor 杜世超任志宇
Owner HEILONGJIANG UNIV