ELECTRODE CATALYST LAYER FOR FUEL CELL, MANUFACTURING METHOD FOR SAME, AND MEMBRANE ELECTRODE ASSEMBLY AND FUEL CELL USING SAME

摘要

This electrode catalyst layer for a fuel cell contains an electrolyte and a catalyst that comprises a catalyst carrier and a catalyst metal supported on the catalyst carrier. The catalyst is partially coated with the electrolyte. The specific surface area of the catalyst metal where gas can reach the electrolyte, regardless of whether the gas passes through the electrolyte, is at least 50% of the total specific surface area of the catalyst metal. As a result, an electrolyte catalyst layer having excellent gas transportability is provided.