Edge-controlled ultrathin PdAg/PdPtAg ternary nanosheets for efficient ethanol oxidation reaction

Abstract

Ultrathin metal alloy nanosheets offer promising applications in electrocatalysis due to their superior performance. In this study, we present a rational synthesis of ternary alloy ultrathin PdAg/PtPdAg nanosheets possessing highly porous edges (PdAg/PtPdAg P-NSs). By adopting mild reduction conditions and eliminating the need for strong surface-binding stabilizers, we effectively suppressed 3D growth and stabilized the unstable edges, resulting in ultrathin nanosheets with highly porous features. Importantly, these PdAg/PtPdAg P-NSs demonstrate remarkable electrocatalytic performances for the ethanol oxidation reaction, outperforming both their ternary counterparts and commercial Pd/C catalysts. This innovative synthetic approach offers a pathway to the design of high-performance 2D electrocatalysts for a broad spectrum of applications.