Electrode for electrolysis, electrolytic process using the electrode, and electrolytic apparatus using them

• US 20080060947A1
• Filed: 09/13/2007
• Published: 03/13/2008
• Est. Priority Date: 09/13/2006
• Status: Abandoned Application

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Kitsuka, Kenta, Iseki, Masahiro, Kaneda, Kazuhiro, Ikematsu, Mineo
• Application Number:
  US11/898,544
• Publication Number:
  US 20080060947A1
• Time in Patent Office: Days
• US Class Current: 205/466
• CPC Class Codes: C02F 1/4618 for producing "ionised" acidic or basic water
• CPC Class Codes: C02F 2001/46138 Electrodes comprising a substrate and a coating
• CPC Class Codes: C02F 2001/46185 only anodic or acidic water, e.g. for oxidizing or sterilizing
• CPC Class Codes: C02F 2201/4611 Fluid flow
• CPC Class Codes: C02F 2201/46115 Electrolytic cell with membranes or diaphragms
• CPC Class Codes: C02F 2201/46125 Electrical variables
• CPC Class Codes: C02F 2209/23 O3
• CPC Class Codes: C25B 1/13 Ozone
• CPC Class Codes: C25B 1/30 Peroxides
• CPC Class Codes: C25B 11/059 Silicon
• CPC Class Codes: C25B 11/077 the compound being a non-noble metal oxide
• CPC Class Codes: C25B 11/093 at least one noble metal or noble metal oxide and at least one non-noble metal oxide
• CPC Class Codes: Y02E 60/36 Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

Abstract

An object of the present invention is to provide an electrode for electrolysis which is available by an easy fabrication process, can produce ozone water at high efficiency and also can produce hydrogen peroxide and OH radicals having a high oxidizing power by the electrolysis of water at a low current density; an electrolytic process using the electrode; and an electrolytic apparatus using them. The electrode for electrolysis according to the present invention has a substrate and a surface layer formed on the surface thereof, the surface layer being made of anatase type titanium oxide.

Claims

1. An electrode for electrolysis comprising a substrate and a surface layer formed on the surface thereof, wherein the surface layer is anatase type titanium oxide.

2. An electrode for electrolysis according to claim 1, wherein the surface layer has a thickness not greater than 1 mm.

3. An electrode for electrolysis according to claim 1 or 2, wherein the surface layer has a thickness from 200 nm to 600 nm.

4. An electrode for electrolysis according to any one of claims 1 to 3, wherein the substrate is conductive at least a contact surface thereof with the surface layer.

5. An electrolytic process, which comprises electrolyzing water or an electrolyte solution at a current density from 0.1 mA/cm² to 2000 mA/cm² while using an electrode for electrolysis as claimed in any one of claims 1 to 4 as an anode.

6. An electrolytic process according to claim 5, wherein the substance produced by the electrolytic process is at least one of ozone, hydrogen peroxide and another active oxygen species.

7. An electrolytic apparatus, which comprises an electrode for electrolysis as claimed in any one of claims 1 to 4 and electrolyzes water or an electrolyte solution by using the electrode in accordance with an electrolytic process as claimed in claim 5 or 6.