Morphological Effect of Pd Catalyst on Ethanol Electro-Oxidation Reaction

Materials

Raúl Carrera Cerritos¹  Minerva Guerra-Balcázar²  Rosalba Fuentes Ramírez³  Janet Ledesma-Garc໚² 

[1] Center for Research and Technological Development in Electrochemistry, Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo, Qro., C.P. 76703, México; E-Mail:;Research and Graduate Division, Engineering Faculty, Autonomous University of Queretaro, Cerro de las Campanas, Querétaro, Qro., C.P. 76010, México; E-Mails:;Chemical Engineering Department, University of Guanajuato, Natural Sciences Division, Noria Alta s/n, Col. Noria Alta, Guanajuato, Gto., C.P. 36050, México; E-Mail:

关键词: Pd nanoparticles;    Pd nanobars;    Pd nanorods;    ethanol electro-oxidation;   

DOI  :  10.3390/ma5091686

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.