Vitreous Carbon Electrode
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Development of Three-Dimensional Electrodes of PbO2 Electrodeposited on Reticulated Vitreous Carbon for Organic Eletrooxidation
The application of electrochemical technology for the degradation of organic pollutants often faces two main problems, related to the anode material and mass transport limitations. Although PbO2 electrode is inexpensive and provides satisfactory electrooxidation kinetics, in the form of plane electrodes it is unable to resolve the mass transfer problem that
J. Braz. Chem. Soc.. Publicado em: 2017-01
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2. Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes
The development of simple methods for removal of heavy metals from aqueous samples is a relevant field of research. In this connection, the electrodeposition of the Cd+2 ion, one of the most toxic species for animals and human beings, was investigated in aerated pH 4.8 sulfuric-sulfate solutions. In potentiostatic conditions, the maximum rate of cadmium depo
Publicado em: 2010
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3. Electrochemical behavior of vitreous glass carbon and platinum electrodes in the ionic liquid 1-n-butyl-3-methylimidazolium trifluoroacetate
A janela eletroquímica do líquido iônico trifluoroacetato de 1-n-butil-3-metilimidazólio foi estudada sobre eletrodos de carbono vítreo e platina em condições estática e dinâmica. Observouse uma drástica diminuição da janela eletroquímica ao trocar o eletrodo de carbono vítreo (4.50 V) pelo de platina (2.50 V). A variação da velocidade de rot
Publicado em: 2010
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4. Electrochemical control of aqueous solution pesticide: study for the degradation of 2,4-dichlorophenoxyacetic acid / Controle eletroquimico de herbicida em soluções aquosas : estudo da degradação do acido 2,4-diclorofenoxiacetico
In this work, the performance of the H2O2 electrogeneration process from O2 reduction on a reticulated vitreous carbon cathode was investigated. The process was also use for the oxidation of the herbicide 2,4-dichlorophenoxyacetic acid. Firstly, cyclic voltammetries were used for the identification of possible reduction reactions of the herbicide. The suppor
Publicado em: 2006
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5. Preparation and characterization of conducting polymer electrodes on reticulated vitreous carbon (RVC) for application in secondary batteries. / Preparação e caracterização de eletrodos de polímeros condutores sobre carbono vítreo reticulado (RVC) para a aplicação em baterias secundárias.
The general purpose of this work is the optimization of the conducting polymer deposition on RVC and the use of these electrodes in an allpolymeric ion-lithium battery, which means an anode and a cathode made of conducting polymers. Several steps were done in order to attain this purpose: i) a previous study on the effect of different pre-treatments on the R
Publicado em: 2006
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6. Hidrogenação eletrocatalítica de substratos orgânicos: estudo da eficiência dos metais nobres níquel, paládio e platina usando eletrodos modificados
Nickel, palladium and platinum micro-crystals were dispersed in films covering a vitreous carbon plate electrode by ion exchange followed by electroreduction of their ions. These modified electrodes were used in the electrocatalytic hydrogenation of several substrates of different classes and their efficiency is reported. A comparison among them was performe
Química Nova. Publicado em: 2004-08
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7. "Caracterização eletroquímica e imobilização de metaloporfirinas em filmes de pirrol eletropolimerizados: preparação e aplicação". / Electrochemical characterization and immobilization of metalloporphyrins on electropolymerized pyrrole films: prepartion and application
This work describes the preparation and characterization of metalloporphyrin-modified electrodes and their application in the reduction or/and oxidation of organic compounds. The studied metalloporphyrins were 5,10,15,20-tetrakis(4-methylpyridyl) porphyrinmanganese(III)hexafluorophosphate, [Mn(T4MPyP)](PF6)5, and 5,10,15,20-tetrakis(2-aminophenyl)porphyr
Publicado em: 2003
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8. Bastões de grafite reciclados de baterias comuns e seu uso como eletrodo modificado em hidrogenação eletrocatalítica de alguns substratos orgânicos
This paper presents some results on the employ of recycled graphite electrode obtained from used common 1.5 V batteries in the preparation of modified electrode and the electrocatalytical hydrogenation of benzaldehyde and of n-valeraldehyde. This inexpensive and easy to obtain electrode was prepared by coating it with a 1:1 mixed film of poly-(allylfenil eth
Química Nova. Publicado em: 2002-12
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9. Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes
The development of simple methods for removal of heavy metals from aqueous samples is a relevant field of research. In this connection, the electrodeposition of the Cd+2 ion, one of the most toxic species for animals and human beings, was investigated in aerated pH 4.8 sulfuric-sulfate solutions. In potentiostatic conditions, the maximum rate of cadmium depo
Materials Research. Publicado em: 2001-07
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10. Desenvolvimento e otimização de reatores com eletrodos tridimensionais para eletrogeração de H2O2
This work reports a study on a process for the electrogeneration of hydrogen peroxide. Two types of electrochemical reactors. using three-dimensional porous electrodes. with a reticulated structure. were used. In both systems the performance the reactors. during the hydrogen peroxide production was investigated. as a function of applied potential. flow rate
Publicado em: 2001