Method for generating oxygen and water electrolysis device

a technology of water electrolysis and oxygen, which is applied in the direction of electrolysis components, electrolysis processes, electrolysis coatings, etc., to achieve the effect of efficient oxygen generation

Inactive Publication Date: 2015-08-13
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017]The present invention provides a method for efficiently generating oxygen by electrolyzing water using a copper delafossite compound as an anode. The present invention also provides a water electrolysis device suitable for the method.

Problems solved by technology

However, Great Britain Patent Publication No. 1400948B is silent about a method for generating oxygen.

Method used

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

Examples

Experimental program
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Effect test

first embodiment

[0034]FIG. 1 shows a schematic view of a water electrolysis device 100 according to a first embodiment. The water electrolysis device 100 according to the first embodiment comprises a container 11, an anode 12, a cathode 13, and a power supply 14.

[0035](Container 11)

[0036]An electrolyte aqueous solution 15 is stored in the container 11. An example of the electrolyte aqueous solution 15 is an alkaline aqueous solution such as potassium hydroxide or sodium hydroxide. Water is electrolyzed using the alkaline aqueous solution to improve the efficiency of the oxygen generation and to decrease an electric power necessary for the electrolysis.

[0037]Another example of the electrolyte included in the electrolyte aqueous solution 15 is sulfuric acid, nitric acid, or perchloric acid. More specifically, an example of a cation of the electrolyte included in the electrolyte aqueous solution 15 is a proton, an alkali metal ion, or an alkali earth metal ion. An example of an anion of the electrolyt...

example 1

(Preparation of the Anode 12)

[0072]The anode 12 according to the example 1 was made by supporting a copper rhodium delafossite compound on a conductive carbon substrate.

[0073]First, the copper rhodium delafossite compound was prepared by a solid-phase reaction method.

[0074]Particularly, copper(I) oxide represented by the chemical formula Cu2O (available from Wako Pure Chemical Industries, Ltd., 1.17 grams) and rhodium(III) oxide represented by the chemical formula Rh2O3 (available from Wako Pure Chemical Industries, Ltd., 2.0 grams) were ground and mixed sufficiently in an agate mortar to give a mixture.

[0075]The mixture was supplied to a tableting machine. Then, the mixture was pressed at a pressure of 40 MPa to give a tablet containing copper(I) oxide and rhodium(III) oxide. The tablet had a diameter of 25 millimeters.

[0076]The tablet was subjected to sintering in a muffle furnace (available from Full-tech Furnace Co. Ltd., trade name: FT-101FMW) under a tempareture of 1,050 degre...

reference example 1

[0106]An anode supporting a copper oxide represented by the chemical formula CuO was prepared as below and the overvoltage thereof was calculated.

[0107]Copper(II) oxide represented by the chemical formula CuO (available from Kojundo Chemical Laboratory Co., Ltd., 25 milligrams) was dispersed in pure water (2 milliliters) to prepare a slurry. Similarly to the case of the example 1, an anode was prepared using the slurry and the oxygen generation property thereof was evaluated. The curve (b) in FIG. 6 is an electric current-voltage property of the anode according to the reference example 1. The anode according to the reference example 1 had an electric potential difference EPD1 of 1.85 volts. Therefore, the anode according to the reference example 1 had an overvoltage of 0.62 volts.

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Abstract

The present invention provides a method for efficiently generating oxygen by electrolyzing water using a copper delafossite compound as an anode. First, in the present invention, a water electrolysis device is prepared. The water electrolysis device comprises container, a power supply, an anode, a cathode; and an aqueous electrolytic solution. The anode and the cathode are in contact with the aqueous electrolytic solution. The anode has a copper rhodium delafossite compound represented by a chemical formula CuRhO2. The copper rhodium delafossite compound is in contact with the aqueous electrolytic solution. Then, an electric potential difference is applied 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 copper rhodium delafossite compound.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This is a continuation of International Application No. PCT / JP2014 / 002543, with an international filing date of May 14, 2014, which claims priority of Japanese Patent Application No. 2013-102728, filed on May 15, 2013, the contents of which are hereby incorporated by reference.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to a method for generating oxygen and a water electrolysis device.[0004]2. Description of the Related Art[0005]Great Britain Patent Publication No. 1400948B discloses a method for generating chlorine by electrolyzing sodium chloride using an anode having a delafossite compound represented by a chemical formula ABO2 (where A represents platinum, palladium, silver, or cobalt, and B represents chrome, iron, cobalt, rhodium, aluminum, gadolinium, scandium, indium, thallium, lead, ruthenium, or lanthanide) on the surface thereof. However, Great Britain Patent Publication No. 1400948B is silent a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C25B11/04C25B1/10C25B9/19
CPCC25B1/10C25B11/0473C25B1/04Y02E60/36C25B9/73C25B9/19C25B11/081C25B11/093
Inventor TANIGUCHI, REIKOTOYODA, KENJI
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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