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Method for preparing electrocatalytic coating by using plasma

A plasma and electrocatalysis technology, applied in the field of electrochemistry, can solve the problems of oxidation, deactivation, iridium-based oxide peeling of titanium substrates, etc., to reduce cracking behavior, enhance catalytic activity, and alleviate the electrochemical oxidation process. Effect

Active Publication Date: 2021-12-21
WUXI LITTLE SWAN ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this type of surface morphology, high temperature treatment will not only oxidize the titanium substrate, but also the electrolyte can easily penetrate through the cracks during the electrochemical process, resulting in electrochemical oxidation of the titanium substrate, which in turn leads to the detachment of the iridium-based oxide. and inactivation

Method used

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  • Method for preparing electrocatalytic coating by using plasma
  • Method for preparing electrocatalytic coating by using plasma
  • Method for preparing electrocatalytic coating by using plasma

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Embodiment 1

[0031] As a preferred example, the present invention takes the preparation of the iridium cobalt oxide coating as an example, and the radio frequency plasma jet excited by 2MHz is used as a preparation tool to illustrate the preparation method of the electrocatalytic anode coating, and carry out a series of experiments with the prepared anode coating Test to verify the effectiveness of the preparation method. use as figure 1 The radio frequency plasma jet shown is used for the preparation of iridium cobalt oxide coating, the main experimental steps are as follows:

[0032] 1. Treat the cut titanium sheet with conventional cleaning and surface treatment methods, and air dry it for later use;

[0033] 2. Connect the plasma jet device excited by radio frequency. The input gas is argon. A certain amount of oxygen is introduced into the plasma; or compressed air is directly used as the reactive gas of the plasma. figure 1 is a schematic diagram of a plasma jet excited by radio f...

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Abstract

The invention relates to a method for preparing an electrocatalytic coating by using plasma, comprising the following steps: using a precursor solution of an electrocatalytic material to form a precursor coating on the surface of a substrate, and then using a plasma jet to bake the precursor coating Layer, the baking temperature is 100‑400 °C; repeat the above steps several times to form a composite coating with a thickness of 5‑20 μm on the substrate surface; then use the plasma jet to sinter the composite coating at a sintering temperature of 400‑ 600°C, that is, an electrocatalytic coating is formed on the surface of the substrate. The invention not only obviously reduces the cracking behavior of the coating surface, lightens the electrochemical oxidation process of the substrate, but also enhances the catalytic activity of the electrocatalytic material.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a method for preparing an electrocatalytic coating by using plasma. Background technique [0002] In the field of electrochemistry, hydroxyl radicals have extremely strong oxidizing ability, and their ability to obtain electrons is second only to fluorine gas. Hydroxyl radicals react with organic matter such as microorganisms and bacteria, and can oxidize them into harmless inorganic substances such as CO 2 , H 2 O, inorganic salts, etc. Therefore, hydroxyl radicals can be used for degradation of organic polluted wastewater, purification, disinfection and sterilization of tap water, etc. [0003] Among these promising electrocatalytic materials, iridium-based oxide electrocatalytic materials have attracted much attention due to their long operating time and high reactivity for oxygen evolution reaction. In these anode materials, other oxides, such as tantalum pentoxide, tin di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/28
CPCC02F1/46109C02F2001/46142
Inventor 辛煜马晓萍王柯童何奕
Owner WUXI LITTLE SWAN ELECTRIC CO LTD
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