Electro-oxidation of ethanol of PtPdSn/C-Sbsub(2)Osub(5)-SnOsub(2) electrocatalysts prepared by borohydride reduction
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International Journal of Electrochemical Science
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Pt/C-Sb2O5.SnO2, PtPd/C-Sb2O5.SnO2 and PtPdSn/C-Sb2O5.SnO2 electrocatalysts were prepared in a
single step using H2PtCl6.6H2O, Pd(NO3)2.2H2O and SnCl2.2H2O as metal sources, sodium
borohydride as reducing agent and a physical mixture of 85% Vulcan Carbon XC72 and 15%
Sb2O5.SnO2 (antimony tin oxide – ATO) as support. X-ray diffractograms showed that Pt-Pd-Sn(fcc)
alloy, carbon and Sb2O5.SnO2 phases are present in the PtPdSn/C-Sb2O5.SnO2 electrocatalysts.
Transmission electron microscopy for all electrocatalysts showed that the metal nanoparticles were
homogeneously distributed over the supports with average particle sizes in the range of 3-5 nm. The
electro-oxidation of ethanol was studied by cyclic voltammetry and chronoamperometry at 25oC and in
a single Direct Ethanol Fuel Cell (DEFC) at 100oC. PtPdSn/C-Sb2O5.SnO2 electrocatalysts exhibited
superior performance for ethanol electro-oxidation than PtPd/C-Sb2O5.SnO2 and Pt/C-Sb2O5.SnO2
electrocatalysts, respectively. In situ FTIR studies showed that acetic acid and CO2 are preferentially
formed using PtPdSn/C-Sb2O5.SnO2 electrocatalysts.
Como referenciar
PIASENTIN, R.M.; SOUZA, R.F.B. de; SILVA, J.C.M.; SPINACE, E.V.; SANTOS, M.C.; OLIVEIRA NETO, A. Electro-oxidation of ethanol of PtPdSn/C-Sbsub(2)Osub(5)-SnOsub(2) electrocatalysts prepared by borohydride reduction. International Journal of Electrochemical Science, v. 8, n. 1, p. 435-445, 2013. DOI: 10.1016/s1452-3981(23)14031-4. Disponível em: http://repositorio.ipen.br/handle/123456789/8254. 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.