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Title: | Electrochemical performance of carbon-supported Pt(Cu) electrocatalysts for low-temperature fuel cells |
Author: | García Cardona, Julia Sirés Sadornil, Ignacio Alcaide Monterrubio, Francisco Brillas, Enric Centellas Masuet, Francesc A. Cabot Julià, Pere-Lluís |
Keywords: | Oxidació Electrocatàlisi Oxidation Electrocatalysis |
Issue Date: | 30-Jan-2020 |
Publisher: | Elsevier Ltd |
Abstract: | Pt(Cu) nanoparticles supported on carbon nanofibers (CNFs), multi-walled carbon nanotubes (MWCNTs) and Vulcan carbon XC72, have been synthesized by electroless deposition and galvanic exchange. The structural analyses show contracted Pt fcc lattices due to the formation of a PtCu alloy core covered by a Pt-rich shell, mean crystallite sizes of about 3 nm, as well as good dispersion and carbon attachment. The electrochemical surface areas (ECSAs) of Pt(Cu)/CNF and Pt(Cu)/XC72 are comparable to those of commercial Pt/C and PtCu/C. The Pt(Cu) electrocatalysts show more negative onset potentials for CO oxidation than Pt/C and PtCu/C, thus indicating their greater CO tolerance. Pt(Cu)/CNF and Pt(Cu)/MWCNT present the highest mass activity and specific activity for the O2 reduction, respectively, both with better relative stability than Pt(Cu)/XC72. Pt(Cu)/CNF and Pt(Cu)/MWCNT are then considered good cathode catalysts, yielding estimated savings of about 50 wt.% Pt, when applied to low-temperature fuel cells. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.ijhydene.2020.02.038 |
It is part of: | International Journal of Hydrogen Energy, 2020, vol. 45, num. 40, p. 20582-20593 |
URI: | http://hdl.handle.net/2445/170099 |
Related resource: | https://doi.org/10.1016/j.ijhydene.2020.02.038 |
ISSN: | 0360-3199 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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