Electrode catalyst for fuel cell, electrode catalyst layer for fuel cell, method for producing the same, and membrane electrode assembly and fuel cell using the catalyst layer

摘要

The present invention relates to an electrode catalyst for fuel cell containing a catalyst carrier having carbon as a main component and a catalytic metal carried on the catalyst carrier, wherein the electrode catalyst for fuel cell has a ratio R′ (D′/G intensity ratio) of a peak intensity of D′ band (D′ intensity) measured in the vicinity of 1620 cm⁻¹ to a peak intensity of G band (G intensity) measured in the vicinity of 1580 cm⁻¹ by Raman spectroscopy of more than 0.6 and 0.8 or less, and satisfies at least one of the (a) to (d). According to the present invention, an electrode catalyst for fuel cell excellent in gas transportability is provided.