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Electrode capable of reversing polarity, and application thereof

A polarity reversal and electrode technology, applied in the field of electrochemistry, can solve problems such as large chlorine gas and pollution

Pending Publication Date: 2021-09-03
MAGNETO SPECIAL ANODES SUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of chlorine analysis electrode and sodium chloride polar solution will produce a large chlorine gas pollution problem

Method used

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  • Electrode capable of reversing polarity, and application thereof
  • Electrode capable of reversing polarity, and application thereof
  • Electrode capable of reversing polarity, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] TA1 grade industrial pure titanium was used as the substrate, after heat treatment at 500°C for 1 hour, etched in 30.0wt% sulfuric acid at 90°C for 4 hours, cleaned in ultrapure water with an ultrasonic device and dried in the air.

[0049] The middle layer coating solution is configured as a hydrochloric acid solution containing chloroiridic acid and chloroplatinic acid. Wherein, in terms of metal content, the mass ratio of platinum:iridium is 8:2, the platinum content is 4.8wt%, and the HCl concentration is 10.0wt% (added with saturated hydrochloric acid). Coating the intermediate layer coating solution on the metal titanium substrate by thermal decomposition method 4 times (each coating, in terms of metal content, the total amount of platinum and iridium is 1.0g / m 2 ), thermal decomposition at 500°C for 20 minutes after each coating, to obtain an intermediate layer containing metal platinum and iridium dioxide. In terms of metal content, the total amount of platinum...

Embodiment 2

[0071] TA1 grade industrial pure titanium was used as the substrate, after heat treatment at 500°C for 1 hour, etched in 30.0wt% sulfuric acid at 90°C for 4 hours, cleaned in ultrapure water with an ultrasonic device and dried in the air.

[0072] The middle layer coating solution is configured as n-butanol solution containing chloroiridic acid and chloroplatinic acid. Wherein, in terms of metal content, the mass ratio of platinum: iridium is 7:3, the platinum content is 4.2wt%, the HCl concentration is 2.0wt% (added with saturated hydrochloric acid), and the remaining components are n-butanol. Coating the intermediate layer coating solution 8 times on the metal titanium substrate by the thermal decomposition method (each coating, in terms of metal content, the total amount of platinum and iridium is 1.25g / m 2 ), thermal decomposition at 500°C for 20 minutes after each coating, to obtain an intermediate layer containing metal platinum and iridium dioxide. In terms of metal co...

Embodiment 3

[0091] Use TA1 grade industrial pure titanium as the substrate, heat treatment at 500°C for 1 hour, place in 7.5wt% oxalic acid at 90°C for etching for 1 hour, cool down to 80°C and continue etching for 12 hours. Wash in ultrapure water using a sonication device and allow to dry.

[0092] The middle layer coating solution is configured as n-butanol solution containing chloroiridic acid and chloroplatinic acid. Wherein, in terms of metal content, the mass ratio of platinum: iridium is 5:5, the platinum content is 3.0wt%, the concentration of hydrochloric acid is 2.0wt% (added with saturated hydrochloric acid), and the remaining components are n-butanol. Coating the intermediate layer coating solution on the metal titanium substrate by thermal decomposition method 2 times (each coating, in terms of metal content, the total amount of platinum and iridium is 1.0g / m 2 ), thermal decomposition at 500°C for 20 minutes after each coating, to obtain an intermediate layer containing me...

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Abstract

The invention discloses an electrode capable of reversing polarity, and application thereof. The electrode comprises a substrate, a middle layer and a catalyst layer, wherein the substrate comprises metal or alloy thereof; the middle layer is arranged on the substrate and comprises platinum group metal and platinum group metal oxide; and the catalyst layer is disposed on the middle layer, and the catalyst layer includes a mixed metal oxide. The electrode can be used as an electrode for electrolysis, electrodialysis or electroplating. The electrode can meet the working environment requirements of the cathode and the anode at the same time, the environmental tolerance is improved, and the protection of the substrate is realized; and polarity reversal can be carried out, and sediments on the surface of the electrode can be quickly and efficiently cleaned.

Description

technical field [0001] The present application relates to but not limited to the field of electrochemistry, in particular, relates to but not limited to an electrode capable of polarity reversal and its application. Background technique [0002] As an environmentally friendly insoluble anode, the oxygen-evolving titanium electrode has been widely used in the electrochemical industry, and its main applications are concentrated in electrochemical water treatment, extraction of metal elements, and electroplating and other finishing processes. The oxygen-evolving titanium electrode is mainly composed of a pure metal titanium or titanium alloy substrate and a noble metal oxide catalyst layer on the surface. The substrate provides electrical conductivity and mechanical support, and the catalyst layer greatly reduces the oxygen evolution potential in the aqueous solution through its own oxidation-reduction process. To achieve the effect of energy saving, relying on its extremely lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/053C25B11/063C25B11/093C25D17/10C25B1/02B01D61/42
CPCC25B1/02C25B11/069C25B11/075C25B11/093Y02E60/36C25B11/091C25B11/063C25B11/052C25D17/10C02F1/4693C25B11/097C25B11/036
Inventor 赵奇特陈宏源薛军威
Owner MAGNETO SPECIAL ANODES SUZHOU CO LTD
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