Carbon-supported ptsncu, ptcu and ptsn electrocatalysts for ethanol oxidation in acid media
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Data
2014-05
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Resumo
Carbon-supported PtSnCu, PtSn, PtCu and Pt electro-catalysts were prepared by reduction
of metal precursors in ethanol reflux. These materials were characterized by energy-dispersive
X-ray spectroscopy (EDX), X-ray diffraction (XRD) and high resolution transmission electron
microscopy (HRTEM). Electrochemical properties were characterized by cyclic voltammetry and
chronoamperometry in presence and absence of ethanol in the electrolyte solution. Results showed
a metal nanoparticle homogeneous distribution on the carbon support with small agglomerate
formation, particle sizes were determined as 2-4 nm and solid solutions formation were observed.
The electrochemical characterization evidenced the material stability and a drastic decrease of the
onset potential for ethanol electrochemical reaction was observed when Cu is used as a modifying
compound to the PtSn electrocatalyst.
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Palavras-chave
PtSnCu, Electrocatalysis, DEFC, Ethanol oxidation, PEMFC
Citação
MAGALHÃES, Monah M.; COLMATI, Flavio.Carbon-supported ptsncu, ptcu and ptsn electrocatalysts for ethanol oxidation in acid media. Journal of the Brazilian Chemical Society, Campinas, v. 25, n. 8, p. 1317-1325, May 2014.