One-pot synthesis of Pt-Pd bimetallic nanodendrites with enhanced electrocatalytic activity for oxygen reduction reaction

One-pot synthesis Pt-Pd bimetallic nanostructure has become a promising way to get superior oxygen reduction reaction (ORR) performance and cost-effective electrocatalyst for proton exchange membrane fuel cells (PEMFCs). In this work, we report a facile one-pot method by tuning the feed ratio of Pt and Pd (Pt3Pd1, Pt2Pd1, and Pt1Pd1) in ethylene glycol solution, at the effect of iodide ions and poly (vinylpyrrolidone) (PVP) to synthesize three different Pt-Pd bimetallic nanodendrites structure. Transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HR-TEM) revealed that the nanodendrites have a Pt-rich surface structure and numerous high-index facet at the branches surface, thus provided a great deal of catalytic sites. Carbon supported Pt-Pd nanodendrites catalysts was investigated for oxygen reduction reaction (ORR) performance and accelerated durability test (ADT). The Pt1Pd1/C catalyst shows the best activity and durability, and with a mass activity of 1.164 A mgP...