Caballero Manrique, GriseldaBrillas, EnricCentellas Masuet, Francesc A.Garrido Ponce, José AntonioRodríguez González, Rosa Ma.Cabot Julià, Pere-Lluís2020-02-212020-02-212015-04-302073-4344https://hdl.handle.net/2445/150939Pt and Pt-Ru shells on Cu cores supported on Vulcan carbon XC72R have been synthesized and tested as possible anode electrocatalysts for polymer electrolyte fuel cells. Pt(Cu)/C was prepared by Cu electrodeposition on the black carbon support at constant potential followed by Pt deposition on Cu by galvanic exchange, whereas Pt-Ru(Cu)/C was prepared by spontaneous deposition of Ru species on Pt(Cu)/C. The corresponding cyclic voltammograms in 0.5 M H2SO4 solution showed the hydrogen adsorption/desorption peaks and no Cu oxidation. The respective CO stripping peak potentials of Pt(Cu)/C and Pt-Ru(Cu)/C were about 0.1 and 0.2 V more negative than those corresponding to Pt/C and Ru-decorated Pt/C. The best conditions for CO oxidation were found for Cu deposition potentials between -0.2 and -0.4 V vs Ag/AgCl/KCl(sat). The Pt economy of the Pt-Ru(Cu)/C system was proved for the methanol oxidation, with specific currents more than twice those obtained on the Ru-decorated commercial Pt/C catalysts.23 p.application/pdfengcc-by (c) Caballero-Manrique, Griselda et al., 2015http://creativecommons.org/licenses/by/3.0/esOxidació electroquímicaNanopartículesElectrolytic oxidationNanoparticlesinfo:eu-repo/semantics/article6525942020-02-21info:eu-repo/semantics/openAccess