An electrode catalyst layer, a process for producing the same, and a gas diffusion electrode comprising an electrode catalyst layer, a membrane / electrode assembly comprising an electrode catalyst layer, and a solid polymer type fuel cell comprising an electrode catalyst layer

摘要

An electrode catalyst layer for use in a fuel cell, the layer having a composite particle material in which catalyst particles are supported on conductive particles, a proton conductive polymer and a metal oxide, wherein said metal oxide is non-particulate.