Electrocatalytic Activity of Copper–Palladium Nanopaticles for Formic Acid Oxidation

Tuesday, 7 October 2014
Expo Center, 1st Floor, Center and Right Foyers (Moon Palace Resort)
M. G. Montes de Oca-Yemha (Universidad Autónoma Metropolitana-Azcapotzalco), M. Palomar-Pardavé, M. Romero-Romo (Universidad Autónoma Metropolitana Azcapotzalco), T. D. J. Licona-Sánchez (Universidad Autónoma Metropolitana-Azcapotzalco), M. Torres-Rodríguez, V. A. Medina-Rojano, and E. Gónzalez Martínez (Universidad Autónoma Metropolitana, Azcapotzalco)
In this work, the catalytic activity of copper-palladium (Cu-Pd) nanoparticles (NPs) is studied for formic acid oxidation. The Cu-Pd NPs were synthesized in a toluene/water system at room temperature. The synthesis of organic phase containing the metal ions was carried out as follows: the aqueous solutions containing the cooper and palladium metals ions, Cu(NO3)2 and PdCl2. Cu and Pd were mixed in appropriate amounts to obtain aqueous solution with 1:1 molar ratios of Cu:Pd. The toluene solution of hexadecylamine (C16H33NH2) was added to the Cu and Pd aqueous solution under strong stirring. For the mixture solution, an immediate two-layer separation was produced, with a light yellow organic phase on the top and a yellow tinted aqueous phase on the bottom. Ions were allowed to diffuse gradually into the organic phase by complexing them with the amine. Cu-Pd NPs were characterized by UV-Vis spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and energy dispersive X-ray (EDX) analysis. The catalytic activity of Cu-Pd NPs was evaluated for formic acid oxidation, using the anodic current density. The electrochemical result shows that Cu-Pd NPs present a higher catalytic activity than Pd NPs.