Oxidation electrode, manufacturing method thereof, and electrolysis device comprising same

A manufacturing method and electrode technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve problems such as decreased stability, increase decomposition efficiency, prevent dissolution, and minimize electrical resistance the effect of

Active Publication Date: 2022-05-13
POSTECH ACAD IND FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when this common metal is used in an electrochemical wastewater treatment method, there is a problem of elution at a pH in the neutral region, and the stability is significantly lowered, so there is a risk that chemicals need to be injected to maintain the pH in the alkaline region. limitation

Method used

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  • Oxidation electrode, manufacturing method thereof, and electrolysis device comprising same
  • Oxidation electrode, manufacturing method thereof, and electrolysis device comprising same
  • Oxidation electrode, manufacturing method thereof, and electrolysis device comprising same

Examples

Experimental program
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Effect test

Embodiment 1

[0134] Pretreatment of supports

[0135] A Ti support in the form of a flat plate having a size of 10 cm×10 cm (length×width) and a thickness of 1 mm was prepared. Grind the above-mentioned support with sandpaper until the gloss of the surface disappears, and heat-treat at about 80° C. in an oxalic acid solution in which 10 g of oxalic acid is dissolved per 100 mL of the solution, and then use diluted acetone and distilled water. Washing to pretreat the Ti support.

[0136] electron transport layer

[0137] Ni(NO 3 ) 2 and Fe(NO 3 ) 2 After dissolving in ethanol at a molar ratio of about 1:2, an electron transport layer precursor solution adjusted so that the total metal ion concentration was about 250 mM was prepared.

[0138] The above-mentioned electron transport layer precursor solution is coated on the pretreated Ti support body by dip coating method, and a total of 6 times of heat treatment at about 425 ° C for about 10 minutes are carried out to form an electr...

reference example 1

[0143] H 2 IrCl 6 and TaCl 5 After dissolving in isopropanol at a molar ratio of 7:3, an electron-transporting layer precursor solution adjusted so that the concentration of the total metal ions becomes about 150 mM was prepared, and the same method as in Example 1 was produced. oxidation electrode.

experiment example

[0156] [Experimental example]-The amount of current generation, the amount of active chlorine cluster generation, and the battery voltage of the oxidation electrode were compared. The amount of current generated by the oxidation electrode.

[0157] Specifically, a reduction electrode made of stainless steel having the same size (10 cm×10 cm) as the above-mentioned oxidation electrode was prepared. Arrange in parallel so that the distance between the oxidation electrode and the reduction electrode is about 5 mm, and soak in 100 mL of 50 mM electrolyte (NaCl), and make the 8 cm of each electrode 2 contact with electrolyte. Furthermore, an Ag / AgCl reference electrode is disposed on one side of the oxidation electrode.

[0158] Each of the above oxidation electrodes and reduction electrodes was connected to a potentiostat (Potentiostat, Bio-Logic, SP-50).

[0159] Under the voltage condition of 0.8V~2.2V relative to the Ag / AgCl reference electrode, the oxidation electrodes invo...

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Abstract

The present description relates to oxidation electrodes, methods for their manufacture, and electrolysis devices incorporating them. The present invention provides an oxidation electrode, comprising: a support; an electron transport layer on at least one side of the support; and an interfacial reaction layer on one side of the electron transport layer, the electron transport layer comprising A composite metal oxide represented by the following chemical formula 1, in which x is the number of atoms of Ni, (1-x) is the number of atoms of Fe, y is the number of atoms of O, x is 0.2 to 0.5, and y 1 to 1.5. Chemical formula 1Ni x Fe (1‑x) o y 。

Description

technical field [0001] This specification claims priority from Korean Patent Application No. 10-2018-0006791 filed with the Korean Patent Office on January 18, 2018, the contents of which are incorporated in the present invention in its entirety. [0002] The present description relates to oxidation electrodes, methods for their manufacture, and electrolysis devices incorporating them. Background technique [0003] In general, the treatment of pollutants in water includes adsorption, chemical treatment, biochemical treatment, and high oxidation treatment. Among them, known ozone / ultraviolet (Ozone / UV), H 2 o 2 / UV, Photo-Fenton, TiO 2 Iso-high oxidation treatment is the most powerful water treatment process. Due to the increasing demand for enhanced water quality standards and chemical-free treatment in various industrial wastewater treatment facilities such as semiconductor wastewater, one of the major industries in Korea, attention is increasing on electrochemical wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461
CPCC02F1/461C02F2001/46133C02F1/46109
Inventor 赵康佑
Owner POSTECH ACAD IND FOUND
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