NOVELTY - A bimetallic nanowire synthesis method involves: adding first (102) and second solutions (104) into a vessel containing porous template (106) with the first solution containing first and second reagents added on one side of porous template and second solution added on an opposite side of porous template, where first reagent comprises first salt of transition metal, an actinide metal and a lanthanide metal. The second reagent comprises a second salt of at least one of a transition metal, an actinide metal and a lanthanide metal, and the second solution contains a reducing agent.    USE - For synthesizing bimetallic nanowires (claimed), used as effective electrocatalysts for Oxygen Reduction Reactions (ORR) and alcohol electro-oxidation reactions in Polymer Electrolyte Membrane Fuel Cells (PEMFCs).    ADVANTAGE - The nanowire exhibits unique structure-dependent optical, electrical and thermal properties. The method allows formation of metallic nanowires without non-metal components under ambient, surfactantless conditions. The method provides surfactantless and electroless methods for bimetallic nanowire synthesis under environmentally benign conditions, to provide a bimetallic nanowire. The method allows synthesis of bimetallic nanowires avoiding use of surfactants, electrochemical equipment, toxic reaction media, and physical vapor deposition techniques. The method utilizes environmentally friendly solvents, such as alcohols or water, and is performed under ambient conditions. The method employs a U-tube double diffusion vessel to prepare high-quality, single crystalline, bimetallic nanowires. The diameter of the bimetallic nanowires is controlled and is 1 nm to 1 mu m. The nanowires are free of non-metallic impurities, such oxides, halides, sulfides, phosphides, or nitrides, and organic contaminants, such as capping agents, surface ligands or surfactants without additional purification steps. The method utilizes the U-tube double diffusion vessel to provide control over properties of the bimetallic nanowire.    DETAILED DESCRIPTION - A bimetallic nanowire synthesis method involves: adding first (102) and second solutions (104) into a vessel containing a porous template (106) with the first solution containing first and second reagents added on one side of the porous template and the second solution added on an opposite side of the porous template, where the first reagent comprises a first salt of at least one of a transition metal, an actinide metal and a lanthanide metal. The second reagent comprises a second salt of at least one of a transition metal, an actinide metal and a lanthanide metal, and the second solution contains a reducing agent.    DESCRIPTION OF DRAWING(S) - The figure shows schematic view illustrating U-tube double diffusion vessel employed to synthesize nanowires.    U-tube double diffusion vessel (100)    First solution (102)    Second solution (104)    Porous template (106)