ELECTRODE CATALYST FOR FUEL CELL, METHOD FOR PRODUCING THE SAME, ELECTRODE CATALYST LAYER FOR FUEL CELL COMPRISING THE CATALYST, AND MEMBRANE ELECTRODE ASSEMBLY FOR FUEL CELL AND FUEL CELL USING THE CATALYST OR THE CATALYST LAYER

摘要

Provided is a fuel cell catalyst that has high catalytic activity and that can maintain high catalytic activity. This fuel cell electrode catalyst comprises a catalyst carrier composed mainly of carbon, and a catalyst metal supported on said catalyst carrier. The catalyst has a 0.6 or lower ratio R' (D'/G intensity) of the D' band peak intensity (D' intensity) measured near 1620 cm-1 to a peak intensity (G intensity) of the G band measured near 1580 cm-1 with Raman spectroscopy, and a 0.15-0.30 volume ratio of the amount of water vapor adsorption to the amount of nitrogen adsorption at a 0.5 relative pressure on an adsorption isotherm.