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Lead dioxide electrode and preparing method thereof

A lead dioxide and electrode technology, applied in the field of electrochemistry, achieves good corrosion resistance, solves the problem of poor mechanical strength, and is beneficial to industrial applications

Inactive Publication Date: 2005-07-06
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, research in this area is limited to PbO prepared by electroplating 2 Electrodes, PbO prepared by other methods 2 Whether the electrode also has high electrochemical activity has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1, the lead dioxide powder prepared by the chemical precipitation method is uniformly mixed with the FR002A type polytetrafluoroethylene micropowder (the average particle diameter is 5 microns) provided by Shanghai Sanaifu New Material Co., Ltd. with a mass ratio of 7: 1, and the Press it into a 100mm×30mm rectangular sheet under a pressure of 20MPa. After baking the sheet at 250-300 degrees Celsius for 2 hours, it is used as an electrode. The surface of the electrode is smooth, firm and compact, and its resistance is 50-100Ω. At a voltage of 100V and a current density of 1000A / m 2 Working under conditions, the annual corrosion rate is less than 0.05%. When it is applied to the electrolytic treatment of dye neutral bordeaux solution, the decolorization rate is about 75% under the condition of 18W external power for 1.5 hours, which is about 1.7 times that of ordinary graphite electrodes under the same conditions; the COD removal rate is about 30%, which is abo...

Embodiment 2

[0016] Example 2, commercially available lead dioxide powder and industrial-grade polytetrafluoroethylene micropowder (average particle size less than 20 microns) are uniformly mixed with a mass ratio of 0.5:1, and pressed into a 100mm×30mm rectangular sheet under a pressure of 10MPa. The sheet is pre-electrolyzed for 10-24 hours in the target treatment solution neutral bougainvillea solution, and then used as an electrode. The electrode has a smooth surface, high mechanical strength, and a resistance of 2 to 3 kΩ. At a voltage of 100V and a current density of 1000A / m 2 Working under conditions, the annual corrosion rate is less than 0.05%. Under the condition of an applied power of 18W, the neutral date red solution was electrolyzed for 1.5 hours, and the decolorization rate was about 70%, about 1.6 times that of ordinary graphite electrodes under the same conditions; the removal rate of COD was about 30%, about that of ordinary graphite electrodes under the same conditions ...

Embodiment 3

[0017] Example 3, the lead dioxide powder prepared by the chemical precipitation method and the industrial-grade polytetrafluoroethylene micropowder (average particle diameter less than 100 microns) are evenly mixed with a mass ratio of 2.5: 1, and pressed into a 100mm × 30mm rectangular sheet under a pressure of 30MPa . After baking the sheet at 100 degrees Celsius for 3-5 hours, it will be used as an electrode. The surface of the electrode is smooth, the mechanical strength is high, and the resistance is 200-500Ω. At a voltage of 100V and a current density of 1000A / m 2 Working under conditions, the annual corrosion rate is less than 0.05%. When applied to the electrolytic treatment of dye alizarin red solution, the decolorization rate is about 60% under the condition of 18W applied power for 1.5 hours, which is about 2 times that of ordinary graphite electrodes under the same conditions; the COD removal rate is about 15%, which is about 1.5 times that of ordinary graphite...

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Abstract

The invention belongs to electrochemistry technology field, relates to a lead dioxide electric pole and preparation method thereof. The electric pole is made of lead dioxide powder and poly-4-oxyethylene or polypropylene particles in a certain mass ratio by mixing and pressing them. The invention is a no-basal body preparation method, solves the problem of coating pull-off radically. The electric pole has advantages of high mechanical strength, high corrosion resistance, high electrochemical activity and simple preparation technique.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a lead dioxide electrode and a preparation method thereof. Background technique [0002] PbO 2 As a kind of insoluble anode material with good performance and low price, the electrode has not only been used in the chemical industry, but also has a good application prospect in the field of environmental protection. [0003] PbO 2 Electrodes can be divided into two types: matrix electrodes and matrix-free electrodes. Conventional matrix-free PbO 2 Electrodes are not suitable for industrial applications due to their poor mechanical strength. The current application is generally the matrix PbO 2 Electrodes, among which titanium-based PbO is more researched 2 electrode. Titanium is a valve-type metal, and it is a good carrier for many electrocatalytic active materials. A layer of conductive and corrosion-resistant PbO is plated on the titanium base. 2 Fina...

Claims

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Application Information

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IPC IPC(8): C25B11/16
Inventor 侯惠奇董文博张仁熙徐莺
Owner FUDAN UNIV
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