Facile Synthesis of Porous PtM (M=Cu, Ni) Nanowires and Their Application as Efficient Electrocatalysts for Methanol Electrooxidation

Porous Pt 75 Cu 25 and Pt 73 Ni 27 nanowires were successfully synthesized by a one‐step wet chemical solution method without the use of any template for the first time. The combination of porous and one‐dimensional features and the addition of a second cheap metal offer high catalyst utilization, excellent catalytic activity, and better durability for the methanol oxidation reaction. Porous Pt 75 Cu 25 and Pt 73 Ni 27 nanowires showed mass current densities of 390 (at 0.69) and 503 mA mg −1 (at 0.70 V), respectively. These mass current densities are much higher than that of Pt nanowires (356 mA mg −1 at 0.73 V) and commercial Pt black (195 mA mg −1 at 0.73 V). During the entire 2000 s current–time test, the porous Pt 75 Cu 25 and Pt 73 Ni 27 nanowires also exhibited higher stability for the methanol oxidation reaction than Pt nanowires and commercial Pt black.