One-pot synthesis of PtIr tripods with a dendritic surface as an efficient catalyst for the oxygen reduction reaction

摘要

Pt-based nanocrystals with a dendritic structure are highly attractive materials for various electrocatalytic applications owing to their high surface area. Herein, a facile one-pot method is presented for the controlled synthesis of PtIr tripods with a dendritic surface (PtIr DTPs), which is achieved by the reduction of Pt and Ir metallic precursors in oleylamine and NH4F with H-2. The unique PtIr DTPs exhibited superior catalytic activity and durability towards the oxygen reduction reaction (ORR). The newly developed one-pot approach is feasible for the synthesis of dendritic tripod Pt-based NCs with a designed composition for various catalytic applications.