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A high-efficiency electrocatalyst material with a three-dimensional structure and its preparation method and application

An electrocatalyst, three-dimensional structure technology, applied in the field of electrochemistry

Active Publication Date: 2021-05-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on the use of strong alkaline solution to etch single-component or multi-component metal substrate materials to form high-efficiency electrocatalysts with three-dimensional structures.

Method used

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  • A high-efficiency electrocatalyst material with a three-dimensional structure and its preparation method and application
  • A high-efficiency electrocatalyst material with a three-dimensional structure and its preparation method and application
  • A high-efficiency electrocatalyst material with a three-dimensional structure and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A method for preparing a high-efficiency electrocatalyst material with a three-dimensional structure, comprising the following steps:

[0048] Cut the selected 304 stainless steel base material into 1*3cm 2 , using acetone, ethanol, 2mol / L hydrochloric acid solution, and deionized water to ultrasonically clean the cut stainless steel substrates for 30 minutes respectively. Stainless steel substrate; then put 40mL of the prepared 6mol / L potassium hydroxide solution and the pretreated stainless steel substrate into a high-pressure closed reaction kettle, and then hydrothermally react in an oven at 160°C for 16h; after deionized water and anhydrous After washing with water and ethanol, it was dried in a vacuum oven at 90 °C for 24 h to obtain a high-efficiency electrocatalyst material with a three-dimensional structure.

[0049] The X-ray diffraction (XRD) spectrum of the high-efficiency electrocatalyst material with three-dimensional structure prepared in this embodiment...

Embodiment 2

[0059] A method for preparing a high-efficiency electrocatalyst material with a three-dimensional structure, comprising the following steps:

[0060] Cut the selected 304 stainless steel base material into 1*3cm 2 , using acetone, ethanol, 2mol / L hydrochloric acid solution, and deionized water to ultrasonically clean the cut stainless steel substrates for 30 minutes respectively. Stainless steel substrate; then put 40mL of the prepared 12mol / L potassium hydroxide solution and the pretreated stainless steel substrate into a high-pressure closed reaction kettle, and then hydrothermally react in an oven at 160°C for 16h; after deionized water and anhydrous After washing with water and ethanol, it was dried in a vacuum oven at 90 °C for 24 h to obtain a high-efficiency electrocatalyst material with a three-dimensional structure.

[0061] The scanning electron microscope (SEM) picture of the high-efficiency electrocatalyst material with three-dimensional structure prepared in this...

Embodiment 3

[0065] A method for preparing a high-efficiency electrocatalyst material with a three-dimensional structure, comprising the following steps:

[0066] Cut the selected 304 stainless steel base material into 1*3cm 2 , using acetone, ethanol, 2mol / L hydrochloric acid solution, and deionized water to ultrasonically clean the cut stainless steel substrates for 30 minutes respectively. Stainless steel substrate; then put 40mL of the prepared 12mol / L potassium hydroxide solution and the pretreated stainless steel substrate into a high-pressure closed reaction kettle, and then hydrothermally react in an oven at 180°C for 16h; after deionized water and anhydrous After washing with water and ethanol, it was dried in a vacuum oven at 90 °C for 24 h to obtain a high-efficiency electrocatalyst material with a three-dimensional structure.

[0067] The scanning electron microscope (SEM) picture of the high-efficiency electrocatalyst material with three-dimensional structure prepared in this...

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Abstract

The invention provides a high-efficiency electrocatalyst material with a three-dimensional structure and its preparation method and application. prepared by etching. The preparation method is as follows: the pretreated metal base material is hydrothermally reacted with a strong alkaline solution at 25-250° C., and after the reaction is completed, it is washed and dried to obtain a high-efficiency electrocatalyst material with a three-dimensional structure. The preparation method of the invention has mild conditions, simple process, and low equipment requirements; the obtained material is used for the oxygen evolution reaction of electrolyzed water, and has electrochemical properties such as lower overpotential and better stability.

Description

technical field [0001] The invention relates to a high-efficiency electrocatalyst material with a three-dimensional structure, a preparation method and application thereof, and belongs to the technical field of electrochemistry. Background technique [0002] As a new type of energy carrier, hydrogen plays a very important role in the process of energy conversion due to its high energy density and environmental friendliness, and has attracted more and more attention. Compared with the existing fossil fuels to produce hydrogen, electrocatalytic water splitting to produce hydrogen is a promising, safe, green and environmentally friendly new way to produce hydrogen. In the process of electrocatalytic water splitting, the anodic oxygen evolution reaction (OER) becomes the rate-limiting step of the water splitting reaction because it involves a slow four-electron process that causes reaction hysteresis, which reduces the overall efficiency of electrolyzed water for hydrogen produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/10C25B11/091C25B1/04
CPCB01J23/755C25B11/04C25B1/04B01J35/33B01J35/61Y02E60/36
Inventor 王建军黄远缪振宇邹杨孔颖桑元华王书华刘宏
Owner SHANDONG UNIV