PURPOSE: To protect the substrate of an oxygen generating electrode from the electrolyte, to prevent the passivation and elution of the substrate from occurring and to comparatively simply and easily manufacture the durable electrode at a low cost by providing the oxygen generating electrode with an intermediate layer which contains a metal oxide wet gel prepared by using the sol-gel process, and further with an electrode active layer on the intermedi ate layer.
CONSTITUTION: The intermediate layer, which consists of a thin film contg. a valve metal oxide prepared with the sol-gel process and/or oxide of an element selected from the group IVB elements except carbon in the periodic table, is formed on the conductive metal substrate consisting of a valve metal or its alloy of the oxygen generating electrode. The electrode active layer contg. a platinum group metal and/or its oxide is formed on the intermediate layer by using the thermal decomposition process. Thus, the oxygen generating electrode having excellent durability and a long life can comparatively simply and easily be manufactured at a low cost.
SUGA SHINJI
ASADA SHIGEO
MURANAGA TOSHIO
TAKASU YOSHIO
