Abstract
A thin carbonized polyimide membrane was formed on the surface of a nickel substrate with small pores by a spray method. It was applied to an electrochemical system, which controls reactions by the electrode potential, to evaluate the properties as a water-electrolysis electrode. Although the over potential for water-electrolysis was relatively high, an electrochemical water decomposition reaction was carried out and a phenomenon of hydrogen permeation through the membrane electrode was observed. From the relationship between the applied current density and the amount of hydrogen permeating through the membrane electrode, it was estimated approximately 80% of the electrochemically generated hydrogen permeates through the membrane electrode.
It was found that an electrochemical reaction and materials produced at the electrolyte/electrode interface separation system is composed of a carbonized polyimide membrane electrode by using micro pores of the membrane itself.
