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Preparation method for noble metal modified titanium anode materials

A precious metal and titanium anode technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of time-consuming 3-10 hours, many operating process control parameters, and shortened life of anode materials, etc., to achieve low consumption of pure titanium , Reduce acid consumption, reduce the effect of precious metal consumption

Inactive Publication Date: 2012-06-20
文广 +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] In recent years, with the adoption of new processes and new technologies, anode preparation methods have developed some new preparation processes, such as: electromagnetic induction heating (electromagnetic induction heating), which uses electromagnetic induction heating to rapidly decompose the precursor and reduce matrix oxidation. But it takes 3 to 10 hours for a long time
Laser heating method, using CO 2 As a heat source, the laser can greatly shorten the heating time and greatly reduce the oxidation of the substrate, but the entire operation process has many control parameters, the operation is complicated, and the quality is difficult to control
[0019] At present, there are still many disadvantages in titanium anode plate materials. For example, the use of high-activity formula coatings improves the activity while greatly reducing the life of the anode material, and the life of the enhanced electrode is about 10 hours; another example is the large amount of precious metal elements, resulting in high cost of anode materials. ; Finally, the bonding force between the noble metal coating and the titanium substrate is rapidly attenuated under complex electric fields and harsh working conditions, causing the coating to fall off and the substrate to corrode

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  • Preparation method for noble metal modified titanium anode materials
  • Preparation method for noble metal modified titanium anode materials
  • Preparation method for noble metal modified titanium anode materials

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preparation example Construction

[0061] The preparation method of the noble metal modified titanium anode material adopts the noble metal organic complex as the precursor, and the precursor is dissolved in an organic solvent and then atomized into an atomized gas flow, deposited on the surface of the titanium metal plate, thermally decomposed and cooled in the presence of an inert gas, The three consecutive steps of deposition, thermal decomposition and cooling are repeated more than once, and the finished product is obtained after post-processing.

[0062] In order to obtain a metal coating with good adhesion to the substrate, a series of pretreatment and surface modification are required for titanium metal, including: sandblasting, alkaline cleaning and degreasing, and ultrasonic acid etching activation. The ultrasonic acid etching activation is to place the metal titanium substrate in oxalic acid with a concentration of 10-20% by volume, the ultrasonic frequency is 30-120kHz, the ultrasonic power is 20-2000...

Embodiment 1

[0069] Embodiment 1 Single noble metal coated titanium anode

[0070] Industrial titanium (brand TA2) with a cutting size of 100×30×1.5 (mm) was used as a metal titanium substrate. After the surface was sandblasted, it was soaked in 5% NaOH solution at 70°C for 20 minutes to remove oil. Then, an ultrasonic instrument with an ultrasonic frequency of 50 kHz and an ultrasonic power of 100 W was selected for ultrasonic activation etching, and a 10% oxalic acid solution with a concentration of 10% by weight at 70° C. was used for ultrasonication for 30 minutes. The pretreated titanium metal substrates were stored dry in a vacuum oven at 10°C.

[0071] Using iridium acetylacetonate as a precursor, it was dissolved in dimethyl sulfoxide and diluted to a concentration of 3% by weight. Place the diluted solution in a high-efficiency ultrasonic atomization device to make the solution into an atomized gaseous state, and use argon as a carrier gas to guide the atomized gas flow into the ...

Embodiment 2

[0073] Embodiment 2 Single noble metal coated titanium anode

[0074] Industrial titanium (brand TA2) with a cutting size of 100×30×1.5 (mm) was used as a metal titanium substrate. After the surface was sandblasted, it was soaked in 5% NaOH solution at 70°C for 20 minutes to remove oil. Then, an ultrasonic instrument with an ultrasonic frequency of 50 kHz and an ultrasonic power of 100 W was selected for ultrasonic activation of etching, and an oxalic acid solution with a concentration of 15% by weight at 60° C. was used for ultrasonication for 45 minutes. The pretreated titanium metal substrate is dried and stored in a low-temperature vacuum oven.

[0075] Ruthenium acetylacetonate was used as a precursor, which was dissolved in dimethyl sulfoxide and diluted to a concentration of 4% by weight. Place the diluted solution in a high-efficiency ultrasonic atomization device to make the solution into an atomized gaseous state, and use nitrogen as a carrier gas to guide the atomi...

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Abstract

The invention relates to a preparation method for noble metal modified titanium anode materials, belonging to the technical field of high-performance electrode materials. The preparation method for noble metal modified titanium anode materials comprises the following steps of: taking noble metal organic complex as a precursor; atomizing the precursor into atomizing flow after being dissolved in organic solvent; depositing the precursor on the surface of a titanium sheet; thermally decomposing and cooling under the existence of inertia gas; repeating three continuous steps of depositing, thermally decomposing and cooling for at least once; and carrying out aftertreatment, so as to obtain the noble metal modified titanium anode materials. The titanium anode prepared by the method has high yield and less surface exposed point; the noble metal and pure titanium base material have high binding force; and the whole coating has better homogeneity and uniformity. Experiments show that the titanium anode prepared by the method has better electrochemical performance and long service life.

Description

technical field [0001] The invention belongs to the technical field of high-performance electrode materials, in particular to a preparation method of noble metal modified titanium anode materials. Background technique [0002] Titanium anode plate material is an insoluble anode material widely used in the electrochemical industry, also known as a dimensionally stable anode, or DSA (dimensionally stable anode), which is based on metal titanium and coated with noble metal organic complexes or The active coating with precious metal materials as the main component is a new type of high-efficiency electrode material developed in the late 1960s. Titanium anodes were first used in the chlor-alkali industry, and have been widely used in chemical industry, metallurgy, electroplating, water treatment, environmental protection, marine, cathodic protection and other fields. [0003] 1. Titanium anode for chlor-alkali industry [0004] Titanium anodes for chlor-alkali industry Titanium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/08C25B11/10C23C18/08
Inventor 文广胡劲谢永春王玉天文劲松
Owner 文广
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