Wet-Chemical Synthesis of Porous Multifaceted Platinum Nanoparticles for Oxygen Reduction and Methanol Oxidation Reactions

Herein, we report a facile and flexible synthesis of porous highly faceted platinum nanoparticles (NPs) performed in the liquid phase. The is by reduction 2,4-pentantedionate presence oleylamine oleic acid dibenzyl ether at 200 °C. growth process was monitored time-course transmission electron microscopy (TEM), revealing peculiar progressive evolution that, comparison with previous methodologies, quite unusual. In fact, morphology evolves first through nanocubes, nanostars, dendrites to arrive multifaceted NPs. This offers possibility selectively obtain materials different degrees complexity time reaction one synthetic approach. Moreover, fine tuning conditions achieved assessing, dedicated experiments, effects temperature, surfactant concentration, ratio, allowing control on NPs’ dispersity shape reproducibility. dimensionally monodispersed NPs have mean diameter 52 ± 2 nm display small regular crystallites uniform facets exposed surface as evinced high-resolution-TEM analysis. as-prepared were tested for oxygen methanol oxidation reactions exhibiting improved catalytic activity respect conventional Pt-based nanomaterials.