ROBERTA ALVARENGA ISIDORO
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Artigo IPEN-doc 27778 Improving the electrocatalytic activities and CO tolerance of Pt NPs by incorporating TiO2 nanocubes onto carbon supports2021 - ANTONIASSI, RODOLFO M.; QUIROZ, JHON; BARBOSA, EDUARDO C.M.; PARREIRA, LUANNA S.; ISIDORO, ROBERTA A.; SPINACE, ESTEVAM V.; SILVA, JULIO C.M.; CAMARGO, PEDRO H.C.Designing efficient anode CO-tolerant electrocatalysts is critical in low-temperature fuel cell catalysts fueled either by H2/CO or alcohol. We demonstrate that the incorporation of TiO2 nanocubes (TiO2NCs) on Carbon Vulcan supports, followed by the synthesis of Pt NPs at their surface (Pt/TiO2NCs-C material), led to improvements in performance towards the electrooxidation of carbon monoxide, ethanol, methanol, ethylene glycol, and glycerol in acidic media relative to the commercial Pt/C and Pt/TiO2-C counterparts employing commercial TiO2. The nanocubes enabled changes in the electronic properties of Pt NPs while contributing to the bifunctional mechanism as compared to Pt/C and Pt/TiO2-C with commercial TiO2. Fuel cell experiments fed with H2/CO steam showed that Pt/TiO2NCs-C employing nanocubes was resistant to CO-poisoning, yielding superior performance in operational conditions. The results reported herein have important implications for developing electrocatalysts with superior performances in PEMFCs.Resumo IPEN-doc 14796 High temperature opertion of direct ethanol fuel cells with Nafion-TiOsub(2) membranes and PtSn/C electrocatalysis2009 - ISIDORO, R.A.; MATOS, B.R.; DRESCH, M.A.; SPINACE, E.V.; TRAVERSA, E.; FONSECA, F.C.; SANTIAGO, E.I.Artigo IPEN-doc 14758 Estudo da oxidacao de etanol em celula a combustivel usando eletrolitos hibridos Nafion-TiOsub(2)2009 - ISIDORO, R.A.; DRESCH, M.A.; SPINACE, E.V.; FARIAS, L.A.; FONSECA, F.C.; LINARDI, MARCELO; SANTIAGO, E.I.Artigo IPEN-doc 17696 Desempenho do eletrocatalisador PtSn/C em células a combustível tipo PEMFC alimentada com misturas Hsub(2)/Co2011 - ISIDORO, ROBERTA A.; SPINACE, ESTEVAM V.; FONSECA, FABIO C.; LINARDI, M.; SANTIAGO, ELISABETE I.Artigo IPEN-doc 14505 High temperature operation of direct ethanol fuel cells with nafion-TiOsub(2) membranes and PtSn/C electrocatalysts2009 - ISIDORO, R.A.; MATOS, B.R.; DRESCH, M.A.; SPINACE, E.V.; LINARDI, M.; TRAVERSA, E.; FONSECA, F.C.; SANTIAGO, E.I.