The present invention provides an electrode catalyst that is excellent in durability, material conductivity, and electrical conductivity and can be produced at a low cost.According to the present invention, there is provided an electrode catalyst including...

Disclosed is an oxide and/or nitride support for electrode catalysts, which is used for electrodes for polymer electrolyte fuel cells (PEFC). The support for electrode catalysts is an aggregation body of primary particles of oxide of at least one kind of m...

For the purpose to provide an electrolyte membrane superior in the properties such as conductivity and stability, this invention provides a sulfonated aromatic polyether characterized in that the principle backbone is represented by the general formula (1)...