Electrode catalyst layer composed of palladium, iridium, and tantalum, and sterile water generating module coated with electrode catalyst

Patent metadata

Field	Value
Publication number	US-11932559-B2
Application number	US-201917290289-A
Country	US
Kind code	B2
Filing date	Dec 13, 2019
Priority date	Dec 27, 2018
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

Electrode catalytic layers coated on outer surfaces of oxidation electrode and a reduction electrode used to generate sterile water, where the electrode catalyst layers are formed on the outer surfaces of the oxidation electrode and a reduction electrode to have predetermined thickness, and are composed of iridium (Ir), palladium (Pd), and tantalum (Ta), and wherein the palladium (Pd) has a weight ratio of 10% to 30%, and a sum of the weight ratios of the iridium (Ir) and the tantalum (Ta) is 70% to 90%.

First claim

The invention claimed is:

1. An electrode catalytic layer coated respectively on outer surfaces of an oxidation electrode and a reduction electrode used to generate sterile rater, wherein the electrode catalyst layer is formed on the outer surfaces of the electrodes to have a predetermined thickness, and is composed of iridium (Ir), palladium (Pd), and tantalum (Ta), and
wherein the palladium (Pd) has a weight ratio of 10% to 30%, and a sum of the weight ratios of the iridium (Ir) and the tantalum (Ta) is 70% to 90%.

2. The electrode catalyst layer of claim 1 , wherein the weight ratios of the iridium (Ir), the palladium (Pd), and the tantalum (Ta) are 60%, 20%, and 20%, respectively.

3. The electrode catalyst layer of claim 1 , wherein the weight ratios of the iridium (Ir), the palladium (Pd), and the tantalum (Ta) are 50%, 30, and 20%, respectively.

4. The electrode catalyst layer of claim 1 , wherein the weight ratios of the iridium (Ir), the palladium (Pd), and the tantalum (Ta) are 70%, 10%, and 20%, respectively.

5. The electrode catalyst layer of claim 1 , wherein the thickness of the catalyst layer is 0.3 μm to 5 μm.

6. The electrode catalyst layer of claim 1 , wherein the mixed oxidant (MO) concentration of the sterile water is maintained at 0.5 ppm or more.

7. A sterile water generating module comprising the electrode catalyst layer of claim 1 , the sterile water generating module comprising:
a pair of oxidation electrode and reduction electrode spaced apart from each other by a predetermined gap;
a current control unit configured to allow current to flow through the oxidation electrode and reduction electrode; and
a sterile water generating unit, on which the pair of oxidation electrode and reduction electrode are mounted, and configured to generate sterile water from source water supplied between the pair of electrodes.

8. The sterile water generating module of claim 7 , wherein each of the pair of oxidation electrode and reduction electrode has a plate shape and is disposed to stand vertically and horizontally, and the source water is supplied into the predetermined gap.

9. The sterile water generating module of claim 7 , wherein the current control unit controls such that a forward potential and a reverse potential are repeated in the pair of oxidation electrode and reduction electrode at a predetermined time interval, and the mixed oxidant (MO) concentration of the sterile water generated by the sterile water generating unit is controlled by adjusting the strength of current applied to the pair of oxidation electrode and reduction electrode.

10. The sterile water generating module of claim 9 , wherein the predetermined time interval is 10 seconds, a forward potential of 10 seconds and a resting state of 10 seconds are repeated one to sixty times, and a reverse potential of 10 seconds and a resting state of 10 seconds are repeated one to sixty times, and
wherein the source water supplied to the sterile water generating unit is supplied at a speed of 0.3 L/min to 1.5 L/min (liters per minute; LPM).

Assignees

• Coway Co Ltd

Inventors

• Lee Sang-Young
• Park Sunhyeok

Classifications

• C02F1/46109 Primary

  Electrodes · CPC title

• C02F1/4672

  by electrooxydation · CPC title

• C22C5/04

  Alloys based on a platinum group metal · CPC title

• C25B11/089

  Alloys · CPC title

• C02F2001/46142

  Catalytic coating · CPC title