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

Abstract

Herein, we present the oriented synthesis of 1D ultrafine bimetallic PtRu alloy nanowires in situ confined on 2D Ti₃C₂T_x MXene nanosheets (PtRu NW/MXene) via 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.