Trimetallic\nHollow Pt–Ni–Co Nanodendrites as Efficient Anodic Electrocatalysts

Abstract

A hollow nanostructure\nrepresents an emerging class of efficient catalysts for advanced catalytic\napplications due to their intrinsic surface area and high catalytic\nactivity. Here, we report the design and synthesis of hollow Pt–Ni–Co\nnanodendrites (NDs) through selectively etching the Ni-rich core of\nsolid core–shell Pt–Ni–Co NDs used as starting\nmaterial. Moreover, the formation mechanism of solid core–shell\nPt–Ni–Co NDs was investigated in detail by tracing the\ngrowth stages at different reaction timed. Impressively, hollow Pt–Ni–Co\nNDs exhibit 4.2- and 6.7-times higher mass activity for methanol and\nformic acid oxidation than that of commercial Pt/C, respectively.