Platinum Rhenium
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Desenvolvimento de catalisadores nanoparticulados do tipo Pt-M1-M2(M1 e M2 = Sn e Re) para aplicação em células a combustível direta de etanol / Development of catalysts nanoparticles of type Pt-M1-M2 (M1 and M2 and Re + Sn) for application in the direct ethanol fuel cell
Neste trabalho foi investigada a eletrooxidação de etanol sobre eletrodos nanoparticulados binários Pt-M1 (M1 = Sn ou Re) e ternários Pt-M1-M2 (M1 e M2 = Sn e Re) suportados em carbono. Estes materiais foram preparados pelo método da redução por álcool e foram caracterizados por difração de raios-X e microscopia eletrônica de varredura associada a
Publicado em: 2008
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2. Avaliação do desempenho de catalisadores do tipo Pt-Re-Sn/Al2O3 na reforma de n-octano.
Pt-Re-Sn/Al2O3-Cl catalysts were evaluated in the n-octane reforming to produce aromatics specially xylenes and were compared with the correspondent monometallic(Pt/Al2O3) and bimetallic (Pt-Re and Pt-Sn/Al2O3) ones. The samples were prepared by coimpregnation and successive impregnations of alumina, with the solutions of the metallic precursors. The solids
Publicado em: 2003
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3. A comparative study of electrochemical and optical properties of rhenium deposited on gold and platinum
Filmes de rênio e de óxido de rênio foram depositados sobre eletrodos de ouro e platina aplicando polarizações potenciostáticas e potenciodinâmicas numa região compreendida entre -- 0,20 V e 0,70 V (vs rhe) em meio aquoso ácido contendo íons perrenato. As espessuras e as variáveis óticas dos filmes foram obtidas empregando perturbações triangul
Journal of the Brazilian Chemical Society. Publicado em: 2002-08
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4. Reforma catalitica do n-octano visando a produção de aromaticos
Catalytic Refonning is a process of great interest to the petrochemical industry for the production of aromatic compounds that are raw material to the manufacture of plastics, elastomers and resins. The catalytic refonning reaction of n-octane was studied in a Berty type reactor with internal recycle aiming on the maximization of xylenes and ethylbenzene. A
Publicado em: 1997
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5. Correlation between catalytic activity and bonding and coordination number of atoms and molecules on transition metal surfaces: Theory and experimental evidence
Correlation between catalytic activity and low-energy local electronic fluctuations in transition metals is proposed. A theory and calculations are presented which indicate that maximum electronic fluctuations take place at high-coordination metal sites. Either (i) atomically rough surfaces that expose to the reactant molecules atoms with large numbers of no