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Síntese de LiFePO4 em sistema hidrotermal assistido por micro-ondas, caracterização e testes como catodo de baterias de íons lítio
(Universidade Federal de São Carlos, 2018-07-30)
Different routes for lithium iron phosphate (LiFePO4) synthesis were studied in a microwave-assisted hydrothermal system in order to reduce the time and temperature of synthesis in relation to the traditional methods of ...
Síntese, caracterização e testes eletroquímicos de dióxido de manganês nanométrico como material de eletrodo de supercapacitores
(Universidade Federal de São Carlos, 2018-08-01)
Manganese dioxide was synthesized by a microwave-hydrothermal method using alternative, unprecedented and completely soluble reagents. For such, potassium permanganate and acetone were dissolved in different proportions ...
Síntese eletroquímica e caracterização de filmes finos de Sb2Se3
(Universidade Federal de São Carlos, 2017-12-05)
Due to the environmental appeal, the shortage of raw material and the chemical complexity of some systems employed at photovoltaic devices, interest has been growing for semiconductors composed of abundant, low toxicity ...
Desenvolvimento de uma nova rota de síntese hidrotermal assistida por micro-ondas para a obtenção de nanopartículas de espinélios de manganês e lítio dopados com alumínio para aplicação em baterias de íons lítio
(Universidade Federal de São Carlos, 2018-03-01)
Spinel of manganese and lithium undoped and doped with aluminum were obtained by an unpublished, energy saving, short time, and low temperature synthesis: microwave-assisted hydrothermal route. Undoped spinel was synthesized ...
Estudo mecanístico de reações de estado sólido: o caso do sistema Pb/PbSO4/Na2SO4
(Universidade Federal de São Carlos, 2012-11-21)
In this work, the growth and reduction of PbSO4 in Na2SO4 solution under transient conditions was characterized. A novel methodology for the working-electrode surface preparation before stabilization enhanced the voltametric ...
Instabilidades em eletrocatálise: cinética complexa catalisada por superfícies modelo
(Universidade Federal de São Carlos, 2018-02-28)
The electro-oxidation of small molecules is an area of great interest due to its application in energy converting systems, such as fuel cells. The reactions present in these systems involve several reaction pathways - which ...
Efeitos térmicos durante a foto-eletro-oxidação de glicerol catalisada por CdS
(Universidade Federal de São Carlos, 2019-10-25)
Cadmium sulfide (CdS) is one of the most important chalcogenides applied to water splitting, which has a band gap of 2.4 eV that suits very well with the solar spectrum. Moreover, CdS possesses a strong reduction activity ...
Caracterização dos processos de eletrodo em compostos do tipo LixNiyCo1-yO2 utilizando técnicas de impedância
(Universidade Federal de São Carlos, 2005-09-09)
In this work a qualitative study was carried out, using electrochemical impedance spectroscopy (EIS), exchanging cobalt by nickel in LixNiyCo1-yO2 compound synthetized by method of the polymeric precursor (Pechini s Method). ...
Estudos microgravimétricos da deposição de cobre sobre eletrodos de cromo passivado.
(Universidade Federal de São Carlos, 2002-11-29)
Recently were obtained in our laboratory results indicating that Cu deposition on
Cr2O3 happens in two steps: at the first one, there is the deposition of an amount
smaller than one Cu monolayer, and at the second one there ...
Obtenção e caracterização eletroquímica do compósito polipirrol
(Universidade Federal de São Carlos, 2002-04-15)
This study was carried out to investigate the electrochemical
preparation of a composite polypyrrole / cobalt, as well as your characterization
physical-chemistry. The composite was electropolymerized on a platinum
substrate ...