Electrochemistry Impedance Spectroscopy
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Nanoparticles of Fe2O3 and Co3O4 as Efficient Electrocatalysts for Oxygen Reduction Reaction in Acid Medium
This paper presents a comparative study about the oxygen reduction reaction (ORR) catalyzed by nanoparticles of Fe2O3 and Co3O4 applied on the surface of glassy carbon electrodes (GCE). The nanoparticles were synthesized using the modified polymeric precursor method (Pechini). These two nanomaterials were characterized by Fourier transform infrared spectrosc
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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2. Uso da voltametria cíclica e da espectroscopia de impedância eletroquímica na determinação da área superficial ativa de eletrodos modificados à base de carbono / Use of cyclic voltammetry and electrochemical impedance spectroscopy for the determination of active surface area of modified carbon-based electrodes
Eletrodos à base de carbono, como os eletrodos de troca iônica, entre outros, têm aplicação principalmente no tratamento de efluentes industriais e rejeitos radioativos. Carbono é também amplamente utilizado em células a combustível como substrato para os eletrocatalisadores, por possuir elevada área superficial, que supera a sua área geométrica.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/07/2011
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3. Study of behavior of copper in systhetic rainwater of São Paulo and Rio de Janeiro and its protection against corrosion by coating and patino exposed to climate action. / Estudo do comportamento de cobre em águas de chuva sintéticas de São Paulo e Rio de Janeiro e sua proteção contra corrosão por revestimentos e pátinas expostos à ação climática.
Copper is one of the metals most widely used to produce metallic artifacts of the artistic and cultural heritage. This is partially due to its great ability to combine with other compounds, forming patinas of different colors. Many of such artifacts are permanently exposed to open air, being thus subjected to the action of atmospheric agents such as rain and
Publicado em: 2009
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4. Study of product tinplate package interaction applied on cupuaçu pulp (Theobroma grandiflorum) / Estudo da interação produto embalagem em folha-de-flandres aplicada a polpa de cupuaçu (Theobroma grandiflorum)
The characteristics of the tinplate cans used in the packaging of cupuaçu pulp, were studied aiming the evaluation of the interaction product/packaging, provided that this fruit has high acidity and its has a massive production in the Amazon region, it becomes necessary the evaluation of the factors that may indicate the adequacy of this type of packaging t
Publicado em: 2008
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5. APLICAÇÃO DE MOLÉCULAS AUTO-ORGANIZÁVEIS (SAM) EM FILMES FINOS DE SnO2 / APPLICATION OF SELF ASSEMBLED MOLECULES (SAM) IN THIN FILMS SnO2
Thin films of tin dioxide (SnO2) with the addition of doping are widely used because its various applications, so develop a search on this subject is of great value technology, since many different forms of doping, formulation and preparation, can be made and modified, intended to improve this material according to their physical and chemical properties. Thi
Publicado em: 2008
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6. Análise por impedância eletroquímica \"on-line\" de conjuntos eletrodo/membrana (MEA) de células a combustível a membrana polimérica (PEMFC) / Analysis for impedance electrochemistry \"on-line\" of membrane/electrode assemble (MEA) of protons exchange membrane fuel cells (PEMFC)
This work reports results of studies and characterization on Membrane Electrode Assemblies (MEAs) for Proton Exchange Membrane Fuel Cell (PEMFC). Some cell operation conditions and different processes of MEA production were investigated. The Electrochemical Impedance Spectroscopy Technique (EIS) (in situ - 0 to 16 A) was used \"on-line\" as a tool for diagno
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/08/2007
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7. EletroquÃmica acoplada à ressonÃncia de plÃsmons de superfÃcie no estudo de adsorÃÃo de proteÃna em filme fino
Biosensor is a device in which the biological source material, such as enzyme, organelle, animal or vegetable tissue, microorganism, antigen or antibody, nucleic acids, lectina, among others is immobilized close to an adequate transducer. Therefore, the electrode/biomolecule/ solution interface characterization consists in one of the main stages for biosenso
Publicado em: 2007
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8. Metal ion recognition and molecular templating in self-assembled monolayers of cyclic and acyclic polyethers
Our recent work with cyclic and acyclic polyether self-assembled monolayers (SAMs) on gold is presented. A series of dithia-crown-tetrathiafulvalene derivatives with one or two disulfide groups has been prepared, and their SAMs on gold have been characterized by electrochemistry and by reflection–absorption infrared spectroscopy. These SAMs are extremely s
National Academy of Sciences.