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Preparation method and applications of Ni-doped FeOOH/NF synthesized by using millisecond laser direct writing technology

A laser direct writing technology, applied in the field of nickel foam, achieves the effect of convenient operation, easy control, and high OER catalytic activity

Active Publication Date: 2020-03-24
TIANJIN 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 that the existing synthesis process cannot effectively synthesize a Ni-doped FeOOH electrocatalyst with high-efficiency OER catalytic activity. The use of millisecond laser direct writing technology can not only synthesize a stable target catalyst, but also create a more stable catalyst in the catalyst. Many defects, and form edge Ni doping to improve its OER performance

Method used

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  • Preparation method and applications of Ni-doped FeOOH/NF synthesized by using millisecond laser direct writing technology
  • Preparation method and applications of Ni-doped FeOOH/NF synthesized by using millisecond laser direct writing technology
  • Preparation method and applications of Ni-doped FeOOH/NF synthesized by using millisecond laser direct writing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Configure 50 mL of hydrochloric acid solution with a concentration of 3 mol / L: Measure 12.99 mL of 36% hydrochloric acid in a 100 mL beaker with a graduated cylinder, then add 37.01 mL of deionized water, and stir evenly with a glass rod;

[0023] (2) Get a foam nickel of 2cm*2cm, soak the foam nickel in the prepared solution of step (1) for 30min and take it out, then rinse the foam nickel five times with deionized water to wash off the hydrochloric acid on the surface;

[0024] (3) Configure 30 mL of FeCl with a concentration of 0.036 mol / L 2 4H 2 O solution: Weigh 214.6mgFeCl 2 4H 2 O was dissolved in 30mL of deionized water, and stirred with a glass rod until the powder was completely dissolved to obtain an iron salt solution;

[0025] (4) placing the foamed nickel obtained in step (2) in the prepared iron salt solution of step (3) to form a sample;

[0026] (5) Place the sample obtained in step (4) on an electric translation stage, then irradiate the sample...

Embodiment 2

[0028] Its basic steps are the same as in Example 1, except that in step (3), the concentration of configuration 30mL is 0.036mol / L of FeCl 3 ·6H 2 O solution: weigh 291.7 mg of FeCl 3 ·6H 2 O was dissolved in 30 mL of deionized water and stirred with a glass rod until the powder was completely dissolved.

Embodiment 3

[0030] The basic steps are the same as those in Example 1, except that in step (5), the energy of the millisecond laser is 1.7J.

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Abstract

The invention relates to a preparation method and applications of Ni-doped FeOOH / NF synthesized by using a millisecond laser direct writing technology. According to the invention, foamed nickel in aniron salt solution is irradiated by using a millisecond laser to prepare Ni-doped FeOOH with a three-dimensional structure; the application of the Ni-doped FeOOH / NF in an oxygen evolution reaction isthat the catalytic performance of an oxygen evolution reaction (OER) is improved by utilizing the high activity sites caused by rich defect sites and edge nickel doping and good conductivity of the Ni-doped FeOOH; and the synthesis method is simple in process, convenient to operate and easy to control, does not use toxic reaction raw materials, and is an environment-friendly synthesis process.

Description

technical field [0001] The present invention relates to millisecond laser irradiation of nickel foam in iron salt solution to prepare Ni-doped FeOOH with three-dimensional structure and its application in oxygen evolution reaction. Active sites and good electrical conductivity to enhance the catalytic performance of oxygen evolution reaction (OER). Background technique [0002] At present, the environmental energy shortage and environmental crisis are becoming more and more serious, and it is imminent to find clean energy to replace fossil fuels. The electrolysis of water to produce hydrogen and oxygen is currently the most promising and effective way to obtain renewable hydrogen energy. However, the OER reaction involved in the electrolysis of water involves complex multiple proton coupling and multiple electron transfer processes, so a high overpotential is required to drive the reaction. Therefore, the high overpotential of water oxidation severely restricts the electrol...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/04C25B1/04C25B11/03C25B11/06
CPCB01J23/755C25B1/04C25B11/057C25B11/031C25B11/051C25B11/075B01J35/33B01J35/56Y02E60/36
Inventor 杨静冯婷杜希文
Owner TIANJIN UNIV
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