MARCELO DO CARMO
14 resultados
Resultados de Busca
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Resumo IPEN-doc 18583 Highly stable porous ultra thin walled platinum nanotubes as a fuel cell catalyst2012 - DOUBEK, G.; SEKOL, R.C.; CARMO, M.; LINARDI, M.; TAYLOR, D.Resumo IPEN-doc 13821 Carbon black functionalized with sulphonic groups and its use as electrocatalysts support for fuel cell applications2008 - CARMO, M.; BRANDALISE, M.; OLIVEIRA NETO, A.; SPINACE, E.V.; LINARDI, M.; POCO, J.G.R.Artigo IPEN-doc 13456 Graft polymerization of sulfonated styrene from carbon black surface and its use as electrocatalysts support for PEMFC and DMFC applications2008 - CARMO, MARCELO; POCO, JOÃO G.R.; LINARDI, MARCELOArtigo IPEN-doc 13981 PtU/C electrocatalysts for ethanol, Hsub(2), Hsub(2)-CO and CO electrooxidation for DEFC and PEMFC applications2007 - CARMO, M.; LINARDI, M.; SEO, E.M.; ANDREOLI, M.; DANTAS FILHO, P.L.; BURANI, G.F.; FRANCO, E.G.Artigo IPEN-doc 19038 Development and electrochemical studies of membrane electrode assemblies for polymer electrode alkaline fuel cells using FAA membrane and ionomer2013 - CARMO, MARCELO; DOUBEK, GUSTAVO; SEKOL, RYAN C.; LINARDI, MARCELO; TAYLOR, ANDRE D.This paper provides guidelines on the fabrication and operation of alkaline fuel cells using quaternary ammonium hydroxide anion exchange membrane (FAA-3 e fumatech), and includes a discussion of the electrode kinetic parameters based on the composition of the catalytic layer. The best peak power density performance, 223 mW cm 2 was obtained with an electrode formed from Pt/C, 0.8 mgPt cm 2 and 25% of FAA-3 ionomer in the catalyst layer for both the cathode and the anode. We demonstrate that the platinum loading can be lowered to values close to 0.5 mgPt cm 2 , without appreciably affecting the fuel cell performance characteristics. The experimental fuel cell data were analyzed using theoretical models of the electrode structure and its kinetics studied over the assembling parameters. We show that most of the electrode systems present limiting currents, with some showing diffusion limitations in the gas channels and/or in the ionomer film covering the catalyst nanoparticles. We also provide some general strategies using Tafel slopes on evaluating the ionomer interaction with the electrode kinetics for the oxygen reduction reaction.Artigo IPEN-doc 15627 A novel electrocatalyst support with proton conductive properties for polymer electrolyte membrane fuel cell applications2009 - CARMO, MARCELO; ROEPKE, THORSTEN; ROTH, CHRISTINA; SANTOS, AMILTON M. dos; POCO, JOÃO G.R.; LINARDI, MARCELOArtigo IPEN-doc 15628 Aprendizado em redes e processo de inovação dentro de uma empresa: a caso Mextra2008 - MOURA, GILNEI L. de; CARMO, MARCELO do; CALIA, ROGERIO C.; FACANHA, SANDRA L.O.Artigo IPEN-doc 14941 The use of a dynamic hydrogen electrode as an electrochemical tool to evaluate plasma activated carbon as electrocatalyst support for direct methanol fuel cell2009 - CARMO, MARCELO; ROEPKE, THORSTEN; SCHEIBA, FRIEDER; ROTH, CHRISTINA; MOELLER, STEPHAN; FUESS, HARTMUT; POCO, JOÃO G.R.; LINARDI, MARCELOArtigo IPEN-doc 17913 Alternative supports for catalysts preparation for low-temperature fuel cells using the alcohol reduction methods2006 - CARMO, MARCELO; SANTOS, ANTONIO R. dos; SPINACE, ESTEVAM V.; FUESS, HARTMUT; POCO, JOÃO G.R.; LINARDI, MARCELOArtigo IPEN-doc 12251 Physical and electrochemical evaluation of commercial carbon black as electrocatalysts supports for DMFC applications2007 - CARMO, MARCELO; SANTOS, ANTONIO R. dos; POCO, JOÃO G.R.; LINARDI, MARCELO