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Method for generating oxygen, water electrolysis device and anode

A water electrolysis and anode technology, applied in electrodes, electrode coatings, electrolysis processes, etc., can solve the problem of no disclosure of the method of generating oxygen

Inactive Publication Date: 2015-11-11
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Patent Document 1 discloses nothing about a method for generating oxygen

Method used

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  • Method for generating oxygen, water electrolysis device and anode
  • Method for generating oxygen, water electrolysis device and anode
  • Method for generating oxygen, water electrolysis device and anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0064] In Embodiment 1, as the delafossite-type silver compound, AgCoO 2 Represented delafossite-type silver-cobalt compounds.

[0065] figure 1 A schematic diagram of the water electrolysis device 100 according to Embodiment 1 is shown. The water electrolysis device 100 according to Embodiment 1 includes a container 16 , an anode 11 , a cathode 12 , and a power source 14 .

[0066] (container 16)

[0067] An aqueous electrolyte solution 15 is stored inside the container 16 . An example of the aqueous electrolyte solution 15 is an alkaline aqueous solution such as potassium hydroxide or sodium hydroxide. By electrolyzing water using an alkaline aqueous solution, the efficiency of oxygen generation can be improved and the electric power required for electrolysis can be reduced.

[0068] Other examples of the electrolyte contained in the aqueous electrolyte solution 15 include sulfuric acid, nitric acid, or perchloric acid. More specifically, examples of cations of the ele...

Embodiment approach 2

[0094] In Embodiment 2, as the delafossite-type silver compound, AgRhO 2 Represented delafossite-type silver-rhodium compounds.

[0095] Figure 5 It is a schematic diagram of the water electrolysis device 200 of Embodiment 2. Figure 5 The shown water electrolysis device 200 includes a container 21 , an anode 22 , a cathode 23 , and a power source 24 .

[0096]

[0097] An aqueous electrolyte solution 25 is accommodated in the container 21 . Examples of the aqueous electrolyte solution 25 include alkaline aqueous solutions such as potassium hydroxide and sodium hydroxide. By electrolyzing water using an alkaline aqueous solution, it is possible to increase the efficiency of oxygen generation and reduce the power required for electrolysis.

[0098] Other examples of the electrolyte contained in the aqueous electrolyte solution 25 include sulfuric acid, nitric acid, or perchloric acid. More specifically, examples of cations of the electrolyte contained in the aqueous ele...

Embodiment 1

[0129] (production of anode 11)

[0130] The anode 11 of Example 1 was produced by supporting a delafossite-type silver-cobalt compound on a conductive carbon substrate.

[0131] First, the delafossite-type silver-cobalt compound was prepared by hydrothermal synthesis.

[0132] Specifically, the chemical formula Co(OH) will be 2 The indicated cobalt hydroxide (available from Wako Pure Pharmaceutical Co., Ltd.) was heated at a temperature of 120° C. in an oxygen atmosphere for 24 hours to obtain cobalt oxyhydroxide represented by the chemical formula CoOOH. Cobalt oxyhydroxide (0.25 g) represented by the chemical formula CoOOH and the chemical formula Ag 2 Silver oxide represented by O (available from Wako Pure Pharmaceutical Co., Ltd., 0.63 g) was mixed in a sodium hydroxide solution (2 mol / L, 40 mL) to obtain a mixture.

[0133] The mixture was heated in a Teflon (registered trademark) vessel at a temperature of 210° C. for 60 hours to obtain a product.

[0134] The obtai...

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Abstract

The present invention provides a method for generating oxygen. The method comprises (a) preparing a water electrolysis device comprising a container storing an electrolyte aqueous solution; an anode which is in contact with the electrolyte aqueous solution and includes at least one silver delafossite compound selected from the group consisting of a silver cobalt delafossite compound represented by a chemical formula AgCoO 2 and a silver rhodium delafossite compound represented by a chemical formula AgRhO 2 ; a cathode which is in contact with the electrolyte aqueous solution; and a power supply, wherein the at least one silver delafossite compound is in contact with the electrolyte aqueous solution, and (b) applying an electric potential difference between the cathode and the anode using the power supply to generate oxygen on the anode due to electrolysis of water which occurs on the at least one silver delafossite compound.

Description

technical field [0001] The present invention relates to a method for generating oxygen and a water electrolysis device. The invention also relates to the anode used in the method. Background technique [0002] Patent Document 1 discloses a method for generating chlorine gas by electrolyzing sodium chloride using an anode whose surface has the chemical formula ABO 2 (where A represents platinum, palladium, silver, or cobalt, and B represents chromium, iron, cobalt, rhodium, aluminum, gadolinium, scandium, indium, thallium, lead, ruthenium, or lanthanides) (delafossite) compound. However, Patent Document 1 discloses nothing about a method of generating oxygen. [0003] prior art literature [0004] Patent Document 1: Specification of British Patent No. 1400948 Contents of the invention [0005] The theoretical voltage required for water electrolysis is 1.23 volts. However, due to the overvoltage of the electrodes, a voltage exceeding 1.23 volts is required in actual wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B9/00C25B11/00
CPCC25B11/0447C25B1/10Y02E60/36C25B1/04C25B9/73C25B11/075
Inventor 谷口丽子丰田健治宫田伸弘
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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