Abstract
Two-dimensional (2D) Pt-based multi-metallic nanostructures have been demonstrated to be used as outstanding electrocatalysts for direct alcohol fuel cell owing to the merits of raising electrocatalytic activity and enhancing the durability of catalysts as well as saving Pt utilization. Herein, we develop an interface-confined strategy, achieving 2D close-packed AuPtTe nanotrough array. This strategy involves two steps: (1) assembly of Te nanowires into 2D monolayer array at hexane/water interfaces, and (2) transformation of 2D interfacial Te nanowire array into AuPtTe nanotrough array by interface-confined etching of PtCl62 and AuCl4 in the water subphase. Optimized 2D Au74Pt23Te3 nanotrough array exhibits ~3.36 and ~2.15A mgAu+Pt–1 in the mass activity towards ethanol and methanol electrooxidation, respectively, ~5 and 3 times that of commercial Pt/C, and shows superior durability to Pt/C, which may be attributed to the synergistic effects of the trough-like morphology and optimal composition. This work may open up a new perspective on the designing of components, morphologies, and compositions of advanced catalysts.
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