Method for manufacturing titanium base lead dioxide electrode capable of controlling coating granularity

A lead dioxide, coating technology, applied in the field of electrochemistry, can solve the problems of stay, application scope limitation, etc.

Inactive Publication Date: 2008-08-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are very few studies on this aspect. The porous matrix-free lead dioxide electrode developed by the patent CN1924102 has improved the specific surface area and reactivity of the electrode, but its application range is limited.
The preparation of CN1073747 and CN2136250 only stays in the improvement of the performance of the lead dioxide electrode, and does not involve the nanoscale category

Method used

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  • Method for manufacturing titanium base lead dioxide electrode capable of controlling coating granularity
  • Method for manufacturing titanium base lead dioxide electrode capable of controlling coating granularity
  • Method for manufacturing titanium base lead dioxide electrode capable of controlling coating granularity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: A titanium plate (10 mm×30 mm×2 mm) was etched in 10 wt % hydrochloric acid solution for 1 hour, and then rinsed with distilled water. The treated titanium plate is placed in an oven and dried, and then the tin antimony oxide coating solution (coating solution consists of: 0.512g SnCl 2 2H 2 O, 0.057g SbCl 3 , 2ml of n-butanol solution, three drops of 37wt% concentrated hydrochloric acid) evenly coated on the surface of the titanium substrate, baked in an oven at 120°C for 5min, then placed it in a muffle furnace and sintered at 500°C for 5min, and took out Cool to room temperature. Repeat this step about twenty times, and finally sinter at 500°C for 1 hour. During the coating process, it is necessary to continuously feed oxygen into the muffle furnace.

[0013] Electrodeposition of nanometer lead dioxide electrode: the composition of electrodeposition solution is 33.12g Pb(NO 3 ) 2 , 1.68g NaF, 7ml HNO 3 , with Ti / Ru-Ti-Sn (30mm×30mm×2mm) as the count...

Embodiment 2

[0014] Embodiment 2: Prepare nano lead dioxide electrode according to the electrodeposition process of embodiment 1, but control potential at 1.60V. As the electrode potential decreases, the electrode reaction rate decreases, the current decreases to about 20mA, and the oxygen evolution rate on the electrode decreases accordingly. A black bright electrode is obtained, and the deposited layer is firmly combined with the substrate. The particle size changes to around 100nm, as shown in Figure 2. PbO 2 The particle size has changed significantly.

Embodiment 3

[0015] Embodiment 3: Prepare lead dioxide electrode according to the electrodeposition process of embodiment 1, but control potential at 1.55V. The drop in potential resulted in almost no observable evolution of oxygen during electrodeposition, the current was on the order of a few mA, and the resulting electrode surface was glossy black. The particle size is around 500 nanometers, as shown in Figure 3. Due to the smaller current, the deposited layer is thinner than the electrode prepared above in the same time.

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Abstract

The invention relates to a preparation method of titanium base lead dioxide electrode with controllable coated particle size. The method comprises the steps: pretreatment of titanium, preparation a middle layer of tin-antimony oxide by adopting a thermal decomposition method and preparation of lead dioxide coating containing fluorine by adopting an electrodeposition method. The titanium base lead dioxide electrode of the invention is easy to carry out industrial operation, has strong bonding performance with a base body, has low price with size scale being 10-500nm and has potential application value.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and relates to a preparation method of a titanium-based lead dioxide electrode capable of controlling the coating particle size. Background technique [0002] Titanium-based lead dioxide electrode (Ti / PbO 2 ), as an anode material commonly used in industry, is widely used in electrochemical synthesis, electrochemical sensors, electrochemical wastewater treatment, and ozone preparation because of its high oxygen evolution potential, low cost, good conductivity, and simple preparation method , hydrometallurgy and battery industry and other fields. [0003] Ti / PbO 2 The electrode is generally prepared by electrodeposition, and a layer of conductive and corrosion-resistant PbO is deposited on the titanium base. 2 Coating, this method can better control the structure and composition of the deposited layer, and obtain a relatively uniform coating interface. However, the currently prepared electrodes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/16
Inventor 林海波任秀斌
Owner JILIN UNIV
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