Preparation method and application of self-supporting controllable electrode material for oxygen evolution

An electrode material, oxygen technology, applied in the direction of electrodes, electrode shapes/types, chemical instruments and methods, etc.

Inactive Publication Date: 2019-12-24
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the basis of known and existing materials of this type, materials with various shapes, reasonable pore size distribution, smaller pore size, and larger comparative area have not been reported by electric field control.

Method used

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  • Preparation method and application of self-supporting controllable electrode material for oxygen evolution
  • Preparation method and application of self-supporting controllable electrode material for oxygen evolution
  • Preparation method and application of self-supporting controllable electrode material for oxygen evolution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a self-supporting controllable electrode material for oxygen evolution, comprising the following steps: x=0.1.

[0032] 0.1mmol of FeCl 3 ·6H 2 O is fully dissolved in 30mL of deionized water and transferred to a Teflon-lined container, and the above solution is added to the container of solution A as a titration solution through a conductive titration head, and the two are mixed evenly, and at the same time, the conductive drop An electric field was applied between the head and the solution, and the voltage was set at +1000V, and the nickel foam substrate that had been ultrasonically cleaned in hydrochloric acid, ethanol and deionized (DI) water was immersed in sequence, and heated at 120° C. for 3 h. After cooling to room temperature, the obtained Ni foam was washed with water three times and dried at 60 °C for 2 hours to obtain the as-prepared electrode material.

[0033] A three-electrode system was used to test the electrocatalytic oxygen e...

Embodiment 2

[0037] A method for preparing a self-supporting controllable electrode material for oxygen evolution and the method includes the following steps: x=0.2

[0038] 0.2mmol of Fe(NO 3 ) 3 After being fully dissolved in 30mL of deionized water, it was transferred to a Teflon-lined container, and the above solution was added to the container of Solution A as a titration solution through a conductive titration head, and after the two were mixed evenly, and at the same time, the Apply an electric field to the solution, set the voltage to +500V, immerse the nickel foam substrate that has been ultrasonically cleaned in hydrochloric acid, ethanol and deionized (DI) water in sequence, and heat at 120°C for 2h. After cooling to room temperature, the obtained Ni foam was washed with water three times and dried at 60 °C for 2 hours to obtain the as-prepared electrode material.

[0039] A three-electrode system was used to test the electrocatalytic oxygen evolution performance of the obtain...

Embodiment 3

[0042] A method for preparing a self-supporting controllable electrode material for oxygen evolution and the method includes the following steps: x=0.3

[0043] Fully dissolve 0.3mmol of ferric acetate in 30mL of deionized water and transfer it to a Teflon-lined container. Add the above solution as a titration solution to the container of solution A through a conductive titration head, mix the two evenly, and simultaneously Apply an electric field between the conductive dropper and the solution, set the voltage to -500V, and immerse the nickel foam substrate that has been ultrasonically cleaned in hydrochloric acid, ethanol and deionized (DI) water successively, and heat at 120°C for 2h . After cooling to room temperature, the obtained Ni foam was washed with water three times and dried at 60 °C for 2 hours to obtain the as-prepared electrode material.

[0044] A three-electrode system was used to test the electrocatalytic oxygen evolution performance of the obtained self-sup...

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Abstract

The invention belongs to the field of electrocatalytic total water hydrolysis, and relates to a preparation method and application of a self-supporting controllable electrode material for oxygen evolution. The shape and structure of a nano material separated out by chemical reaction can be effectively controlled by controlling the intensity and direction of an electric field, achieving controllable preparation and obtaining nano-structure materials with different requirements. The electro-catalytic powder prepared by the method is high in purity, small and uniform in granularity and large in specific surface area, and has potential application space in the aspects of hydrogen production and oxygen production by electro-catalytic hydrolysis.

Description

technical field [0001] The invention belongs to the field of electrocatalytic total water splitting, and relates to a preparation method and application of a self-supporting controllable electrode material for oxygen evolution. Background technique [0002] Due to the increasing energy consumption and environmental problems caused by the use of a large amount of fossil fuels, it is very urgent to find some effective methods to realize the utilization and conversion of clean energy such as solar energy and electricity. Among them, splitting water into hydrogen and oxygen by electricity is one of the most important approaches to address the future shortage of chemical fuels and reduce environmental pollution associated with fossil fuel consumption. Water splitting consists of two half-reactions, the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). However, the slow reaction rate of anodic OER due to its complex four-electron transfer seriously hinder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03C25B11/04B01J23/755C25B1/04
CPCB01J23/755B01J35/0033C25B1/04C25B11/03C25B11/051C25B11/091Y02E60/36
Inventor 郭瑞刘宣文苏娜温辉于涛张圣琦
Owner 东北大学秦皇岛分校
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