Electrode catalyst for use in fuel cells, and fuel cell and electrode utilizing same

An electrode catalyst comprises noble metal particle supported carbon material containing catalytically induced turbostratic structures in parts of its structure. Independent claims are included for the following: (a) a fuel cell comprising the electrode catalyst; and (b) a gas diffusion electrode comprising a catalyst layer formed, on a gas diffusion layer, from the electrode catalyst for fuel cells or a mixture with a solid polyelectrolyte.