Bimetallic PtRu alloy nanowires confined on MXene nanosheets for highly efficient methanol electrooxidation

Herein, we present the oriented synthesis of 1D ultrafine bimetallic PtRu alloy nanowires <i>in situ</i> confined on 2D Ti₃C₂T_<i>x</i> MXene nanosheets (PtRu NW/MXene) <i>via</i> a convenient and robust solvothermal assembly strategy. Both experimental and theoretical investigations demonstrate that this distinct 1D/2D heterointerface design not only effectively stabilizes the integral hybrid structure through a "line-to-face" contact model, but also significantly ameliorates the electronic structure and catalytic environment of the PtRu component. Accordingly, the newly developed Pt₇₀Ru₃₀ NW/MXene catalyst exhibits a large electrochemically active surface area of 130.7 m² g_Pt^-1, a high mass/specific activity of 2083.7 mA mg_Pt^-1/1.59 mA cm^-2, and exceptional long-term stability.