ELECTROLYSIS ELECTRODE POSITIVE ELECTRODE FOR PRODUCING OZONE ELECTROLYSIS POSITIVE ELECTRODE FOR PRODUCING PERSULFATE ELECTROLYSIS AND POSITIVE ELECTRODE FOR CHROMIUM ELECTROLYTIC OXIDATION

摘要

be delivered has a high oxygen overvoltage to be used for the oxidation reaction as its object to provide a long-life electrode for electrolysis. An electrode for electrolysis is formed by a high temperature heat treatment the low oxygen partial pressure under the following 100 , an electrode surface layer formed of the valve metal oxide, the valve metal and the immediately lower level of the electrode surface layer is made of a noble metal other than silver (Ag) , the crystal grain boundary of the valve metal as an electrode for electrolysis in which the noble metal is precipitated dispersion, the determination of the valve metal in the range of the vertical depth direction 30 from the electrode surface, the elongated crystal grains in the vertical cross section from the electrode surface, and , the noble metal is less than 5 atomic% in the vertical direction of depth range of 10 from the electrode surface. ;