NOVELTY - A catalyst material is prepared for either electro-reduction or oxidation reaction in a fuel cell. A substance, insoluble in the catalyst material, is introduced in the catalyst material. The insoluble substance is then removed to increase the surface area of the catalyst material.    USE - For fuel cells used for generating energy by electrochemical reactions, and more specifically for direct-feed oxidation fuel cell.    ADVANTAGE - The method forms catalyst layer on membrane electrolyte including transfer of catalyst decals and deposition of catalyst materials on to a backing layer with minimized catalyst permeation. The method improves catalyst efficiency and reactivity by increasing the surface area. The reactivity of catalyst is increased by changing electronic properties of catalyst layer. Since the catalyst has increased surface area, the reactivity of the catalyst to carry out fuel oxidation and reaction rate are increased. The catalyst has high yield and activity, because particle agglomeration and growth are prevented. The bonding between coated electrodes and membrane in fuel cell is improved and the catalyst utilization is maintained, thereby improving operating efficiency.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) Fabrication of catalyst material which involves mixing a catalyst and polytetrafluoroethylene (PTFE) in a diluted solution to form a mixture liquid, sonicating the mixture liquid and adding perfluorovinylether sulfonic acid in a diluted solution to form a new mixture liquid solution, sonicating the new mixture and placing dry ice to evaporate the liquid portion without agglomeration and growth of particles to form a catalyst material; and    (2) Catalyst material which contains a catalyst comprising tungsten carbide, perfluorovinylether sulfonic acid and PTFE.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram illustrating a typical direct liquid-feed fuel cell having a solid-state membrane electrolyte.