TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The catalyst for trapping the fuel gas or oxidant gas is a catalyst for promoting the reaction of hydrogen and oxygen to produce water, preferably metal such platinum, ruthenium, rhodium, or palladium; an alloy comprising the metal; or an oxide of metal or alloy. The catalyst is incorporated in the electrode catalyst layer. It is carried on a carrier e.g. carbon black, zirconia, alumina, zeolite or silica. At least one of the electrode catalyst layers comprises water repellent carbon powder carrying water repellent material.    TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Parameters: The weight ratio of polymer electrolyte membrane to the carrier is 1.6-2. The ratio of water repellent carbon powder to conductive carbon particle is 3:97 - 50:50.Preferred Method: The method preferably comprises:(a) coating a catalyst with hydrogen ion conductive polymer electrolyte, mixing the coated catalyst with a dispersion medium to prepare an ink, applying the ink on one face of hydrogen ion conductive polymer electrolyte membrane to form a thin layer comprising the catalyst and applying an electrode catalyst ink composition onto the thin layer to form an electrode catalyst layer; or(b) applying an electrode catalyst ink comprising electrode catalyst, hydrogen ion conductive polymer electrolyte and dispersion medium onto a substrate to form an electrode catalyst layer; coating a catalyst with the hydrogen-ion conductive polymer electrolyte; mixing the coated catalyst with a dispersion medium to prepare an ink; applying the ink to the electrode catalyst layer to form a thin layer comprising the catalyst; and transferring the thin layer and electrode catalyst layer on one face of hydrogen ion conductive polymer electrolyte membrane.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: Coating of catalyst with polymer electrolyte includes:(a) spraying a dispersion of polymer electrolyte to the flowing catalyst and drying the catalyst to attach polymer electrolyte to the catalyst;(b) grinding the catalyst with the polymer electrolyte; and(c) granulating the catalyst with the polymer electrolyte.