NOVELTY - The cell has a body including an inlet for receiving a fuel and oxidant mixture. The body houses a selective electrode comprising a selective catalyst that catalyzes reaction with fuel or oxidant, where the selective catalyst is a self-supporting porous catalyst that is selective for oxygen reduction reaction (ORR), and the self-supporting porous catalyst comprises bimodal pore distribution with first distribution of pores in a 40-60 nanometer range and second distribution of pores with average diameter of approximately 200 nanometer range.    USE - Mixed reactant fuel cell i.e. Swiss-roll mixed-reactant direct borohydride-oxygen fuel cell (DBFC), for producing energy from a mixture of fuel i.e. borohydride, and oxidant, used in cars and homes. Can also be used as a direct liquid fuel cell e.g. methanol fuel cell, ethanol fuel cell and formic acid fuel cell, for producing energy from formate salts, formic acid, methanol, borohydride salts, ammonia, hydrazine, hydroxylamine salts, ethanol, ethylene glycol, methyl formate and dimethyl ether.    ADVANTAGE - The cell allows a selective cathode catalyst to be a self-supporting porous metal-nitrogen-carbon (M-N-C) catalyst to promote proximity between oxygen atoms in reactant and active sites in the self-supporting M-N-C catalysts. The cell allows selective fuel distributors to incorporate the pores and matrices that are designed to encourage or favor transport of one reactant. The cell provides porous nature, a high surface area and distribution of active sites in a self-supporting porous catalyst once oxygen reaches a cathode, thus resulting more efficient ORR and improving overall performance of the cell.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for producing a cathode for a mixed reactant fuel cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of layers that form a Swiss roll electrode in a mixed reactant fuel cell.    Electrically conductive axis (15)    Anode (16)    Separators (17a, 17b)    Cathode (18)    Porous fluid distributors (19a, 19b)