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A long-life dsa electrode preparation method that can be used for frequent inversion of cathode and anode

A technology that reverses the anode and cathode, and has a long life. It is applied in the field of electrochemistry, which can solve the problems of insufficient stability of inverted poles and achieve the effect of frequent replacement.

Active Publication Date: 2022-03-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above Ti / RuO 2 -TiO 2 with Ti / IrO 2 -Ta 2 o 5 In order to solve the problem of insufficient stability of conventional electrode inversion, the purpose of the present invention is to provide a long-life electrode preparation method that can be used for frequent inversion of cathode and anode. The electrode prepared by this method can significantly improve the stability of inversion. Under operating conditions, the life of the electrode is greatly extended, and the application range of the electrode is expanded

Method used

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  • A long-life dsa electrode preparation method that can be used for frequent inversion of cathode and anode
  • A long-life dsa electrode preparation method that can be used for frequent inversion of cathode and anode
  • A long-life dsa electrode preparation method that can be used for frequent inversion of cathode and anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Cut the industrial titanium tensile mesh into a sample of 2cm×3cm.

[0032] 2. After degreasing, sandblasting, etching with 37% boiled concentrated hydrochloric acid for 2 minutes, ultrasonic washing with deionized water, and drying, a titanium substrate with a clean and rough surface was obtained.

[0033] 3. To prepare the coating solution, dissolve 1g of ruthenium chloride trihydrate, 1g of chloroiridic acid, and 260mg of rhodium chloride in 19ml, 10ml, and 4ml of a mixed solution of concentrated hydrochloric acid and isopropanol at a volume ratio of 1:1.

[0034] 4. According to the volume ratio of 2:1:2, take the three solutions and mix them evenly to get the spare coating solution.

[0035] 5. Apply the coating liquid evenly on both sides of the treated titanium mesh substrate. After coating, transfer to an oven for drying at 70°C for 5 minutes, then transfer to a muffle furnace for thermal decomposition at 400°C for 5 minutes, and cool to room temperature.

...

Embodiment 2

[0038] 1. Cut the industrial titanium tensile mesh into 2cm*3cm samples.

[0039] 2. After degreasing, sandblasting, etching with 37% boiled concentrated hydrochloric acid for 2 minutes, ultrasonic cleaning with deionized water, and drying, the cut titanium mesh was cleaned to obtain a titanium substrate with a rough surface.

[0040] 3. To configure the coating solution, dissolve 1g of ruthenium chloride trihydrate, 1g of chloroiridic acid, and 300mg of manganese chloride in 20ml, 10ml, and 10ml of the mixed solution of concentrated hydrochloric acid and isopropanol at a volume ratio of 1:2, according to 3 : The volume ratio of 1:1 takes three kinds of solutions and mixes them evenly to get the spare coating solution.

[0041] 4. Apply the coating solution evenly on both sides of the treated titanium mesh substrate. After coating, transfer it to an oven for drying at 80°C for 5 minutes, then transfer it to a box-type resistance furnace for thermal decomposition at 450°C for 5...

Embodiment 3

[0044] 1. Choose a 15cm*39cm titanium plate as the substrate.

[0045] 2. After degreasing, sandblasting, boiling and etching the titanium plate with 20% oxalic acid for 2 hours, ultrasonic washing with deionized water, and drying, a clean and rough titanium substrate was obtained.

[0046] 3. To configure the coating solution, dissolve 15g of tantalum pentachloride, 8g of chloroiridic acid, and 10g of rhodium trichloride in 160ml, 80ml, and 150ml of concentrated hydrochloric acid and isopropanol with a volume ratio of 1:1. : The ratio of 1:2 is to take the three solutions and mix them evenly to get the spare coating solution.

[0047] 4. Apply the coating solution evenly on one side of the treated titanium mesh substrate, transfer it to an oven for drying at 80°C for 5 minutes after coating, then transfer it to a muffle furnace for thermal decomposition at 500°C for 5 minutes, and cool to room temperature.

[0048] Repeat the above step 4 for 20 times, and anneal at 500° C. ...

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Abstract

The invention discloses a long-life DSA electrode preparation method which can be used for frequently inverting cathode and anode. Prepare a clean titanium matrix; active ingredient A (one or more of ruthenium, titanium, tantalum chloride), active ingredient B (one or mixed of iridium, tin chloride), active ingredient C (rhodium, One or more mixtures of manganese and cobalt chlorides) are dissolved in the mixed solution of hydrochloric acid and alcohol in proportion to obtain the precursor solution; the precursor solution is evenly coated on the titanium substrate, heated and dried, then transferred to the muffle furnace , take out of the furnace and cool after thermal decomposition; repeat the implementation several times; anneal the obtained sample and take out of the furnace, and cool to normal temperature. The structure of the electrode prepared by the invention is stable, and the enhanced life under frequent inversion of cathode and anode can reach 40 times that of other common electrodes.

Description

technical field [0001] The invention belongs to an electrode preparation method in the field of electrochemistry, and relates to a long-life DSA electrode preparation that can be used for frequently inverting cathodes and anodes. Background technique [0002] DSA (Shape Stable Anode) electrodes play a very important role in modern electrochemical processes. It usually uses a titanium plate as the substrate, and the transition metal oxide is coated on the surface to improve its electrochemical performance. Generally, the elemental composition, surface morphology, coating thickness, crystal structure, etc. of the surface coating will have a great impact on the performance of the electrode. [0003] In electrochemistry, electrodes can be divided into two types: anode and cathode. The two generally use different electrode materials, and the polarity of the cathode and anode electrodes generally does not change during use. However, in some special occasions, such as electrodial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/053
CPCC02F1/46109C02F2001/46138
Inventor 陈雪明张月金华长於洋
Owner ZHEJIANG UNIV
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