Electrocatalytic performance of PtSn/C-In2O3 center dot SnO2 nanoparticles prepared by sodium borohydride reduction process for ethanol oxidation in acidic and alkaline electrolytes

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dc.contributor.authorPEREIRA, C.V.
dc.contributor.authorFONTES, E.H.
dc.contributor.authorNANDENHA, J.
dc.contributor.authorASSUMPCAO, M.H.M.T.
dc.contributor.authorNETO, A.O.
dc.coverageInternacionalpt_BR
dc.date.accessioned2019-01-31T16:51:08Z
dc.date.available2019-01-31T16:51:08Z
dc.date.issued2018pt_BR
dc.description.abstractPtSn/C-In2O3.SnO2 electrocatalysts were prepared by the borohydride reduction method in the single step using H2PtCl6.6H2O and SnCl2.2H2O as metal sources, sodium borohydride as reducing agent and a physical mixture of 85% Vulcan Carbon XC72 and 15% In2O3.SnO2 (indium tin oxide – ITO) as support. PtSn/C-In2O3.SnO2 electrocatalysts were characterized by X–ray diffraction (XRD), energy dispersive analysis (EDX), transmission electron microscopy (TEM), cyclic voltammetry (CV), chronoamperommetry (CA) and polarization curves in alkaline and acidic electrolytes (single cell experiments). The diffractograms of PtSn/C-In2O3.SnO2 electrocatalysts showed peaks associated to the face-centered cubic (fcc) structure of platinum, peaks which could be identified as a cassiterite SnO2 phase or with Indium-doped SnO2 (ITO) used as supports. TEM micrographs showed metal nanoparticles with average nanoparticle size between 2.4 and 2.7 nm. Ethanol oxidation in acidic and alkaline electrolytes was investigated at room temperature, by chronoamperommetry (CA), where PtSn/C-In2O3.SnO2 (70:30) showed the highest activity among all electrocatalysts in study considering ethanol oxidation for acid electrolyte, while for alkaline electrolyte the highest activity was observed for PtSn/C-In2O3.SnO2 (50:50). Polarization curves at 100oC showed PtSn/C-In2O3.SnO2 (70:30) with superior performance for ethanol oxidation for acidic electrolyte and PtSn/C (70:30) for alkaline electrolyte, when compared to Pt/C for both electrolytes. The best performance obtained by PtSn/C-In2O3.SnO2 (70:30) in real conditions could be associated with the occurrence simultaneously of the bifunctional mechanism and electronic effect resulting from the presence of PtSn alloy or a synergetic effect between PtSn and In2O3.pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipIDFAPESP: 14/09087-4; 14/50279-4pt_BR
dc.description.sponsorshipIDCNPq: 300816/2016-2pt_BR
dc.format.extent10587-10600pt_BR
dc.identifier.citationPEREIRA, C.V.; FONTES, E.H.; NANDENHA, J.; ASSUMPCAO, M.H.M.T.; NETO, A.O. Electrocatalytic performance of PtSn/C-In2O3 center dot SnO2 nanoparticles prepared by sodium borohydride reduction process for ethanol oxidation in acidic and alkaline electrolytes. <b>International Journal of Electrochemical Science</b>, v. 13, n. 11, p. 10587-10600, 2018. DOI: <a href="https://dx.doi.org/10.20964/2018.11.49">10.20964/2018.11.49</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/29431.
dc.identifier.doi10.20964/2018.11.49pt_BR
dc.identifier.fasciculo11pt_BR
dc.identifier.issn1452-3981pt_BR
dc.identifier.orcidaguardandopt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9287-6071
dc.identifier.percentilfi17.31pt_BR
dc.identifier.percentilfiCiteScore43.00
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/29431
dc.identifier.vol13pt_BR
dc.relation.ispartofInternational Journal of Electrochemical Sciencept_BR
dc.rightsopenAccesspt_BR
dc.subjectelectrocatalysts
dc.subjectdirect ethanol fuel cells
dc.subjectethanol
dc.subjectoxidation
dc.subjectborohydrides
dc.subjectreduction
dc.subjectnanoparticles
dc.subjectplatinum
dc.subjecttin
dc.subjectcopper
dc.subjectcarbon
dc.titleElectrocatalytic performance of PtSn/C-In2O3 center dot SnO2 nanoparticles prepared by sodium borohydride reduction process for ethanol oxidation in acidic and alkaline electrolytespt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorJULIO NANDENHA
ipen.autorALMIR OLIVEIRA NETO
ipen.autorERIC HOSSEIN FONTES
ipen.autorCONRADO DE VASCONCELOS PEREIRA
ipen.codigoautor8211
ipen.codigoautor3541
ipen.codigoautor13955
ipen.codigoautor14232
ipen.contributor.ipenauthorJULIO NANDENHA
ipen.contributor.ipenauthorALMIR OLIVEIRA NETO
ipen.contributor.ipenauthorERIC HOSSEIN FONTES
ipen.contributor.ipenauthorCONRADO DE VASCONCELOS PEREIRA
ipen.date.recebimento19-01pt_BR
ipen.identifier.fi1.284pt_BR
ipen.identifier.fiCiteScore2.3
ipen.identifier.ipendoc25213pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi0.001 - 1.499
ipen.range.percentilfi0.00 - 24.99
ipen.type.genreArtigo
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sigepi.autor.atividadeNANDENHA, J.:8211:610:Npt_BR
sigepi.autor.atividadeNETO, A.O.:3541:610:Npt_BR
sigepi.autor.atividadePEREIRA, C.V.:14232:610:S
sigepi.autor.atividadeFONTES, E.H.:13955:610:N
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