Ethanol oxidation reaction using PtSn/C+ce/C electrocatalysts
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Electrochimica Acta
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The ethanol oxidation reaction (EOR) was investigated using PtSn/C + Ce/C electrocatalysts in different
mass ratios (58:42, 53:47, and 42:58) prepared using the polymeric precursor method. Transmission
electron microscopy (TEM) experiments showed particles sizes in the range of 3 to 7 nm. Changes in
the net parameters observed for Pt suggest the incorporation of Sn into the Pt crystalline network with
the formation of an alloy mixture with the SnO2 phase. Among the PtSn/C + Ce/C catalysts investigated,
the 53:47 composition showed the highest activity towards the EOR. In this case, the j versus t curves
obtained in the presence of ethanol in acidic media exhibited a current density 90% higher than that
observed with the commercial PtSn/C (ETEK). Correspondingly, during the experiments performed on
single direct ethanol fuel cells, the maximum power density obtained using PtSn/C + Ce/C (53:47) as
the anode was approximately 60% higher than that obtained using the commercial catalyst. FTIR data
showed that the observed behavior for ethanol oxidation may be explained in terms of a synergic effect
of bifunctional mechanism with electronic effects, in addition to a chemical effect of ceria that provides
oxygen-containing species to oxidize acetaldehyde to acetic acid.
Como referenciar
SOUZA, R.F.B. de; SILVA, J.C.M.; ASSUMPCAO, M.H.M.T.; NETO, A.O.; SANTOS, M.C. Ethanol oxidation reaction using PtSn/C+ce/C electrocatalysts: aspects of ceria contribution. Electrochimica Acta, v. 117, p. 292-298, 2014. DOI: 10.1016/j.electacta.2013.11.129. Disponível em: http://repositorio.ipen.br/handle/123456789/8545. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.