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Morphological Effect of Pd Catalyst on Ethanol Electro-Oxidation Reaction
Center for Research and Technological Development in Electrochemistry, Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo, Qro., C.P. 76703, México
Chemical Engineering Department, University of Guanajuato, Natural Sciences Division, Noria Alta s/n, Col. Noria Alta, Guanajuato, Gto., C.P. 36050, México
Research and Graduate Division, Engineering Faculty, Autonomous University of Queretaro, Cerro de las Campanas, Querétaro, Qro., C.P. 76010, México
* Author to whom correspondence should be addressed.
Received: 27 June 2012; in revised form: 31 July 2012 / Accepted: 13 August 2012 / Published: 19 September 2012
Abstract: 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.
Keywords: Pd nanoparticles; Pd nanobars; Pd nanorods; ethanol electro-oxidation
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MDPI and ACS Style
Cerritos, R.C.; Guerra-Balcázar, M.; Ramírez, R.F.; Ledesma-García, J.; Arriaga, L.G. Morphological Effect of Pd Catalyst on Ethanol Electro-Oxidation Reaction. Materials 2012, 5, 1686-1697.
Cerritos RC, Guerra-Balcázar M, Ramírez RF, Ledesma-García J, Arriaga LG. Morphological Effect of Pd Catalyst on Ethanol Electro-Oxidation Reaction. Materials. 2012; 5(9):1686-1697.
Cerritos, Raúl Carrera; Guerra-Balcázar, Minerva; Ramírez, Rosalba Fuentes; Ledesma-García, Janet; Arriaga, Luis Gerardo. 2012. "Morphological Effect of Pd Catalyst on Ethanol Electro-Oxidation Reaction." Materials 5, no. 9: 1686-1697.