Synthesis of\nMonodispersed Pd Nanoparticles and Ultrathin\nTwisty Pd Nanowire Networks for Electrooxidation of Ethanol

Abstract

In recent years, preparing precious metal catalysts with\na controllable\nmorphology has become a hot research topic for researchers. In this\nstudy, monodispersed palladium (Pd) nanoparticles (NP) and ultrathin\nPd twisty nanowire networks (TNN) were synthesized in a solvothermal\nsystem using <i>N</i>,<i>N</i>-dimethylformamide\n(DMF) and oleylamine (OAm) as solvents, Transmission electron microscopy\n(TEM) images reveal the successful synthesis of nanoparticles and\nultrathin TNN microstructures. Electrochemical data show that the\ncurrent densities of Pd–NP and Pd–TNN for the ethanol\noxidation reaction (EOR) reach 1878 mA mg^–1 and\n1765 mA mg^–1, respectively. Compared to commercial\nPd/C, Pd–TNN and Pd–NP exhibit better catalytic stability,\nlower electron transfer barriers, and more resistance to catalyst\npoisoning. Temperature, pH value, and ethanol concentration are all\nfavorable for the EOR. According to the experimental data, the mechanism\nof enhanced electrocatalytic activity of Pd–NP and Pd–TNN\ncatalysts for ethanol oxidation is discussed. This paper presents\na method for preparing catalysts with stabilized structures to develop\nPd-based catalysts for electrocatalytic oxidation reactions.