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 À1 (at 0.70 V), respectively. These mass current densities are much higher than that of Pt nanowires (356 mA mg À1 at 0.73 V) and commercial Pt black (195 mA mg À1 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.Platinum (Pt) and its composites are most promising catalysts in fuel cells and other heterogeneous catalytic processes. Nevertheless, the high cost as well as the insufficient catalytic activity and stability of Pt catalysts pose a severe challenge for broad applications. [1] Various strategies have thus been developed to improve the catalytic activity and stability of Pt catalysts and decrease the Pt loading. [2][3][4][5][6][7][8][9][10][11][12][13] For example, the addition of a second cheap 3d transition metal (e.g., Fe, Co, Ni, Cu) to Pt to form Pt-based heteronanostructures or alloy catalysts could decrease the Pt loading and increase the catalytic activity and poisoning resistance. [14][15][16] If Pt is present as one-dimensional (1 D) nanostructures such as nanowires, its durability is greatly enhanced. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Porous structures have also been widely employed to enhance catalytic properties owing to their high surface area and rich edge/corner atoms. [32][33][34][35] The combination of 1 D nanostructures and porous structures may further improve performance. However, only a few methods have been developed for the synthesis of porous Pt-based 1 D nanostruc-tures, such as the electrodeposition method, [24,30,31] electrospinning, and a chemical dealloying process. [25] Most reported methods for the synthesis of porous Pt-based nanowires require complicated procedures. To the best of our knowledge, one-step synthetic methods without stabilizers, templates, or external fields for the preparation of porous Pt-based nanowires have never been reported.Herein, we report the one-step synthesis of porous PtM (M = Cu, Ni) nanowires for the first time. The porous PtM (M = Cu, Ni) nanowires were synthesized by solvothermal reaction. The combination of a nanowire structure, porous structure, and the addition of a second cheap metal improves the electrocatalytic activity and durability and saves cost. The application of porous PtM (M = Cu, Ni) nanowires for the electrocatalytic methanol oxidation reaction (MOR) was studied. The obtained porous PtM (M = Cu, Ni) alloy nanowires can act as highly effective catalysts...