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Method for preparing electrode through combination of efficient surface corrosion and graphitization modification

A graphitization and modification technology, applied in electrodes, electrolysis components, electrolysis processes, etc., can solve the problems of high cost of precious metal catalysts, difficult to large-scale commercial application, poor durability, etc., to improve the performance of alkaline hydrogen evolution reaction and improve hydrogen evolution. Catalytic activity, low cost of raw materials

Pending Publication Date: 2022-05-27
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] This application aims at the deficiencies of the existing technology, solves the technical problems of high cost, poor durability and scarcity of noble metal catalysts, and is difficult to carry out large-scale commercial application, and provides a simple catalyst for improving the specific surface area of ​​stainless steel surface and exposing more stainless steel surfaces. Active site, low cost, economical and practical electrode preparation method

Method used

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  • Method for preparing electrode through combination of efficient surface corrosion and graphitization modification
  • Method for preparing electrode through combination of efficient surface corrosion and graphitization modification
  • Method for preparing electrode through combination of efficient surface corrosion and graphitization modification

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Embodiment 1

[0028] An electrode preparation method with efficient surface corrosion combined with graphitization modification, using 304 stainless steel sheet as a stainless steel substrate to prepare an electrode as follows:

[0029] The first step: place the 304 stainless steel sheet in acetone solution for ultrasonic cleaning 20min, and then repeatedly clean with ethanol to remove the metal surface grease layer;

[0030] The second step: the 304 stainless steel sheet after removing the grease layer on the metal surface is placed in a hydrochloric acid solution with a concentration of 5 mol / L and ultrasonicated for 10 min, and left to stand for 20 min, and then repeatedly washed with distilled water to remove the oxide layer on the metal surface, and the surface is obtained after drying. 304 stainless steel sheet after cleaning;

[0031] The 3rd step: place the 304 stainless steel sheet after the surface cleaning treatment in a sealed container containing 5mol / L sodium chloride, 0.1mol / ...

Embodiment 2

[0036] An electrode preparation method with efficient surface corrosion combined with graphitization modification, using 316 stainless steel sheet as a stainless steel substrate to prepare an electrode as follows:

[0037] The first step: the 316 stainless steel sheet is placed in acetone solution for ultrasonic cleaning 30min, and then repeatedly cleaned with ethanol to remove the metal surface grease layer;

[0038] The second step: the 316 stainless steel sheet after removing the grease layer on the metal surface is placed in a hydrochloric acid solution with a concentration of 6 mol / L and ultrasonicated for 5 minutes, and left for 25 minutes, and then repeatedly washed with distilled water to remove the oxide layer on the metal surface, and the surface is obtained after drying. 316 stainless steel sheet after cleaning;

[0039] The 3rd step: place the 316 stainless steel sheet after the surface cleaning treatment in a sealed container containing 10mol / L lithium chloride, 0...

Embodiment 3

[0044] An electrode preparation method with efficient surface corrosion combined with graphitization modification, the method for preparing electrodes using 304 stainless steel mesh as a stainless steel substrate is as follows:

[0045] The first step: the 304 stainless steel mesh is placed in the acetone solution for ultrasonic cleaning 10min, and then repeatedly cleaned with ethanol to remove the metal surface grease layer;

[0046] The second step: the 304 stainless steel mesh after removing the grease layer on the metal surface is placed in a hydrochloric acid solution with a concentration of 1 mol / L and ultrasonicated for 20 minutes, and left to stand for 10 minutes, and then repeatedly washed with distilled water to remove the oxide layer on the metal surface, and the surface is obtained after drying. 304 stainless steel mesh after cleaning;

[0047] The third step: place the 304 stainless steel mesh after the surface cleaning treatment in a sealed container containing 0...

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Abstract

The invention discloses an efficient surface corrosion and graphitization modification combined electrode preparation method which comprises the following steps: carrying out surface cleaning treatment on a stainless steel substrate to obtain a clean stainless steel substrate; the stainless steel substrate subjected to surface cleaning treatment is subjected to corrosion treatment based on solvothermal reaction in a mixed solution containing chloride ion salt, phosphate and phosphoric acid; and carrying out gas-solid reaction on the stainless steel substrate subjected to corrosion treatment under the protection of inert atmosphere, and carrying out graphitization modification on substances on the surface layer of the substrate to obtain the efficient surface corrosion and graphitization modified electrode.

Description

technical field [0001] The invention belongs to the technical field of cathode electrodes for water electrolysis, and in particular relates to an electrode preparation method with efficient surface corrosion combined with graphitization modification. Background technique [0002] China's hydrogen production scale ranks first in the world. At present, hydrogen production by electrolysis of water compatible with new energy sources (wind, light, hydropower, etc.) has gradually developed and grown, and has become the greenest way to obtain hydrogen energy. Among them, alkaline electrolysis water is expected to become the leader of green large-scale hydrogen production. [0003] Alkaline electrolyzed water is mainly composed of hydrogen evolution (Hydrogen Evolution Reaction, HER; 2H 2 O+2e - =H 2 +2OH - ,E 0 =-0.83 V vs SHE) and Oxygen Evolution Reaction (OER; 2OH) - =1 / 2O 2 +H 2 O+2e-,E 0 =0.4V vs SHE) consists of two half-reactions. From the analysis of the theoretic...

Claims

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Application Information

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IPC IPC(8): C25B11/052C25B11/091C25B1/04
CPCC25B11/052C25B11/091C25B1/04Y02E60/36
Inventor 周清稳王皓轩
Owner NANTONG UNIVERSITY
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