Morphological Effect of Pd Catalyst on Ethanol Electro-Oxidation Reaction

作者：Carrera Cerritos Raul; Guerra Balcazar Minerva; Fuentes Ramirez Rosalba; Ledesma Garcia Janet; Gerardo Arriaga Luis

来源：Materials, 2012, 5(9): 1686-1697.

DOI：10.3390/ma5091686

• Pd nanoparticles
• Pd nanobars
• Pd nanorods
• ethanol electro-oxidation

In the present study, three different structures with preferentially exposed crystal faces were supported on commercial carbon black by the polyol method (nanoparticles (NP/C), nanobars (NB/C) and nanorods (NR/C)). The electrocatalysts were characterized by XRD, TEM, TGA and cyclic voltammetry at three different ethanol concentrations. Considerable differences were found in terms of catalytic electroactivity. At all ethanol concentrations, the trend observed for the ethanol oxidation peak potential was preserved as follows: NB/C < NP/C < NR/C < commercial Pd/C. This result indicates that, from a thermodynamics point of view, the NB/C catalyst enclosed by Pd(100) facets presented the highest activity with respect to ethanol electro-oxidation among all of the catalysts studied.

• 出版日期2012-9