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Electrode coating and preparation method thereof

A technology of electrode coating and coating, which is applied in the field of electrodes, can solve the problems such as the lifespan reduction of noble metal electrodes, and achieve the effects of resistance to the erosion of a large amount of gas, simple operation, and good adhesion

Active Publication Date: 2011-08-31
METALINK SPECIAL ALLOYS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this environment, the oxygen evolution reaction is particularly violent, and the working temperature is high, and the service life of conventional noble metal electrodes will be significantly reduced.

Method used

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  • Electrode coating and preparation method thereof
  • Electrode coating and preparation method thereof
  • Electrode coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: An electrode coating with high adhesion and durability, in which a coordination compound is added to the iridium-tantalum coating, wherein the ligand is amino, and the coordination element is molybdenum Mo.

[0021] Its preparation method comprises the following steps:

[0022] Step 1. First, the weight ratio of iridium tantalum Ir-Ta is 65:35 and the total weight of elements is 30g / m 2 Configure iridium-tantalum coating solution, and add diluent n-butanol according to the total amount of metal iridium-tantalum feeding 0.8g / time;

[0023] Step 2. According to the weight ratio of molybdenum and iridium in the coordination compound in the coordination compound is 10:90, add the coordination compound to the solution described in step 1, stir well and let it stand for 1 hour, and the coating solution is prepared;

[0024] Step 3. After degreasing the titanium substrate with a hot washing powder solution, soak it in a 10% oxalic acid solution by weight for 3 h...

Embodiment 2

[0027] Embodiment 2: An electrode coating with high adhesion and durability, in which a coordination compound is added to the iridium-tantalum coating, wherein the ligand is an alkyl group, and the coordination element is tin Sn.

[0028] Its preparation method comprises the following steps:

[0029] Step 1, first configure the iridium-tantalum coating liquid according to the weight ratio of the element iridium-tantalum Ir-Ta 65:35 and the total weight of the elements is 30g / m2, and add diluent n-butanol according to the total amount of metal iridium-tantalum feeding 1g / time;

[0030] Step 2. Add the coordination compound to the solution described in step 1 according to the weight ratio of the coordination element tin and iridium in the coordination compound is 5:95, stir well and let it stand for 1.5 hours, and the coating solution is prepared;

[0031] Step 3. After degreasing the titanium substrate with the chemical reagent acetone, soak it in a hydrochloric acid solution w...

Embodiment 3

[0034] Embodiment 3: An electrode coating with high adhesion and durability, the electrode coating is added with a coordination compound in the iridium tantalum coating, wherein the ligand is a combination of amino and nitro groups, and the coordination element is platinum Pt.

[0035] Its preparation method comprises the following steps:

[0036] Step 1. First, the weight ratio of iridium tantalum Ir-Ta is 65:35 and the total weight of elements is 30g / m 2 Configure iridium-tantalum coating solution, and add diluent n-butanol according to the total amount of metal iridium-tantalum feeding 0.8g / time;

[0037] Step 2. According to the weight ratio of the coordination element platinum and iridium in the coordination compound is 8:92, add the coordination compound to the solution described in step 1, stir well and let it stand for 2 hours, and the coating solution is prepared;

[0038] Step 3. After degreasing the titanium substrate with chemical reagent acetone, soak it in oxal...

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Abstract

The invention discloses a high-adhesiveness durable electrode coating and a preparation method thereof. The electrode coating is prepared by adding a coordination compound into an iridium-tantalum coating, wherein the coordinator is one, two or three of alkyl group, amino group and nitro-group, and the coordinating element is one of molybdenum (Mo), tin (Sn), platinum (Pt), cobalt (Co), manganese (Mn) and titanium (Ti). The product disclosed by the invention uses the coating obtained from the organic coordination compound containing the elements, thus, can well resist acid, erosion of massive gas and impact of high current density, and has favorable cohesive property with the substrate; the service life of the electrode is prolonged; and the method is simple to operate, does not need complicated substrate pretreatment technology, and does not need a complicated middle layer or the like.

Description

technical field [0001] The invention relates to an electrode, in particular to an electrode coating and a preparation method thereof. Background technique [0002] Electrodes based on titanium or other valve-type metals and coated with mixed metal oxides (generally a mixture of noble metals and other common metal oxides) with electrocatalytic properties are used in various electrochemical fields such as electrolysis, It is well known that electroplating, chlor-alkali, organic electrosynthesis and other industries are widely used. This kind of coated anode generally uses the traditional thermal decomposition method to paint the solution containing catalytic metal substances layer by layer on the pure titanium plate that has undergone certain pretreatment. By this method, a non-metallurgical bond between the coating and the substrate is obtained. Observation by scanning electron microscope shows that the coating cracks irregularly, and the porosity of the coating is high. D...

Claims

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Application Information

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IPC IPC(8): C25B11/08
Inventor 贲圣兰吕雪颖于飞王浩冰马步洋
Owner METALINK SPECIAL ALLOYS CORP
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