Electrolysis electrode and electrolyzer

Abstract

To provide an electrolysis electrode having a more preferable shape in electrolyzing pure water, an alkali aqueous solution, or an aqueous solution of an alkali metal chloride at a lower voltage than ever before, and an electrolyzer using the same. An electrolysis electrode or the like including: a metal perforated plate having a value of Factor V of 40 or more represented by the formula: Factor V=Rs×Rc×F/100000, in which Rs is a planar direction surface area per unit area 1 dm2 [cm2/dm2], Rc is a thickness direction surface area per unit area 1 dm2 [cm2/dm2], and F is the number of mesh apertures per unit area 1 dm2 (fine degree) [number/dm2].

1 .- 12 . (canceled) 
     
     
         13 . An electrolysis electrode comprising:
 a metal perforated plate that is an expanded metal and has a value of Factor V of 40 or more,   wherein Factor V=Rs×Rc×F/100000,   wherein Rs is a planar direction surface area per unit area 1 dm2 (cm2/dm2),   wherein Rc is a thickness direction surface area per unit area 1 dm2 [cm2/dm2],   wherein F is a number of mesh apertures per unit area 1 dm2 [number/dm2],   wherein a ratio of a short way center-to-center distance SW to a long way center-to-center distance LW of a mesh of the expanded metal is 0.45 or less.   
     
     
         14 . The electrolysis electrode of  claim 13  wherein the value of Factor V is 70 or more. 
     
     
         15 . The electrolysis electrode of  claim 13  wherein the short way center-to-center distance SW of the expanded metal is 2.0 mm or less. 
     
     
         16 . The electrolysis electrode of  claim 13  wherein a thickness of the mesh of the expanded metal is 0.5 mm or less. 
     
     
         17 . The electrolysis electrode of  claim 13  wherein a thickness of the mesh is from 0.35 to 0.5 mm, wherein the long way center-to-center distance LW of the mesh is from 2.9 to 3.2 mm, wherein the short way center-to-center distance SW of the mesh is from 1.1 to 1.4 mm, wherein a strand ST of the mesh is from 0.4 to 0.7 mm. 
     
     
         18 . An electrolyzer comprising:
 an anode; and   a cathode,   wherein at least one of the anode or the cathode is the electrolysis electrode of  claim 13 .   
     
     
         19 . The electrolyzer of  claim 18  comprising a diaphragm for separating an anode chamber and a cathode chamber. 
     
     
         20 . The electrolyzer of  claim 19  wherein the diaphragm is an ion exchange membrane. 
     
     
         21 . The electrolyzer of  claim 19  wherein the diaphragm is a porous membrane. 
     
     
         22 . The electrolyzer of  claim 19  wherein the diaphragm is in contact with the anode. 
     
     
         23 . The electrolyzer of  claim 19  wherein the diaphragm is in contact with the cathode.