Method for generating oxygen and water electrolysis device

Inactive Publication Date: 2015-07-16
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0016]The present invention provides a method for efficiently generating oxygen by electrolyzing water using a copper de

Problems solved by technology

However, Great Britain Patent Publication No. 14009

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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first embodiment

[0029]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.

[0030](Container 11)

[0031]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.

[0032]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 alkaline earth metal ion. An example of an anion of the electrol...

example 1

Preparation of the Anode 12

[0053]The anode 12 according to the example 1 was made by supporting a copper cobalt delafossite compound on a conductive carbon substrate.

[0054]First, the copper cobalt delafossite compound was prepared by a hydrothermal synthesis method.

[0055]Particularly, cobalt hydroxide represented by the chemical formula Co(OH)2 (available from Wako Pure Chemical Industries, Ltd.) was headed under an oxygen atmosphere at a temperature of 120 Celsius degrees for twenty-four hours to give cobalt oxyhydroxide represented by the chemical formula CoOOH. Cobalt oxyhydroxide represented by the chemical formula CoOOH (0.25 grams) and copper(I) oxide represented by the chemical formula Cu2O (available from Wako Pure Chemical Industries, Ltd., 0.39 grams) were mixed with a sodium hydroxide aqueous solution (40 milliliters) having a concentration of 2 mol / liter to give a mixture. The mixture was poured in a Teflon vessel having a volume of 100 milliliters. Then, the mixture was...

reference example 1

[0092]An anode supporting cobalt oxide represented by the chemical formula Co3O4 was prepared as below and the overvoltage thereof was calculated.

[0093]Cobalt oxide represented by the chemical formula Co3O4 (available from Furuuchi Chemical Corporation, 40 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 (g) in FIG. 4 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 1.60 volts. Therefore, the anode according to the reference example 1 had an overvoltage of 0.37 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 a 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 cobalt delafossite compound represented by a chemical formula CuCoO2. The copper cobalt 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 cobalt delafossite compound.

Description

BACKGROUND[0001]1. Field of the Invention[0002]The present invention relates to a method for generating oxygen and a water electrolysis device.[0003]2. Description of the Related Art[0004]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 chromium, 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 about a method for generating oxygen.SUMMARY[0005]The present invention provides a method for generating oxygen, the method comprising:[0006](a) preparing a water electrolysis device comprising:[0007]a container;[0008]a power supply;[0009]an anode;[0010]a cathode, and[0011]an electrolyte aqueous solution; wherein[0012]th...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B1/10
CPCC25B1/10C25B11/04C01B13/0207C25B1/04C25B9/73C25B11/077Y02E60/36
Inventor TOYODA, KENJITANIGUCHI, REIKOMIYATA, NOBUHIRO
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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