Estevam V. Spinacé
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View article: Cu/Ga2o3 as Photocatalysts for Cooperative Coupling of Methane Conversion and Hydrogen Production
Cu/Ga2o3 as Photocatalysts for Cooperative Coupling of Methane Conversion and Hydrogen Production Open
View article: Cu/Ga2o3 as Photocatalysts for Cooperative Coupling of Methane Conversion and Hydrogen Production
Cu/Ga2o3 as Photocatalysts for Cooperative Coupling of Methane Conversion and Hydrogen Production Open
View article: Hydrogen production using vinasse as sacrificial agent and Pt/TiO2 as photocatalyst under UV irradiation
Hydrogen production using vinasse as sacrificial agent and Pt/TiO2 as photocatalyst under UV irradiation Open
Vinasse, a dark-colored aqueous byproduct of bioethanol production, contains a variety of organic compounds and inorganic salt ions. In this study, vinasse was utilized as a sacrificial agent in the water splitting reaction using Pt/TiO₂ a…
View article: INFLUENCE OF SYNTHESIS TIME IN THE PROPERTIES OF PtRu/CARBON HYBRIDS PREPARED BY HYDROTHERMAL CARBONIZATION METHOD
INFLUENCE OF SYNTHESIS TIME IN THE PROPERTIES OF PtRu/CARBON HYBRIDS PREPARED BY HYDROTHERMAL CARBONIZATION METHOD Open
Background: PtRu/C electrocatalysts present good results in methanol electo-oxidation. The activity of these electrocatalysts is strongly dependent on the synthesis method. Additionally, the use of mesoporous carbons or nanostructured carb…
View article: PROJETO E CONSTRUÇÃO DE UM SISTEMA DE AQUECIMENTO POR MICRO-ONDAS DE BAIXO CUSTO PARA AVALIAÇÃO DE SUSCEPTORES
PROJETO E CONSTRUÇÃO DE UM SISTEMA DE AQUECIMENTO POR MICRO-ONDAS DE BAIXO CUSTO PARA AVALIAÇÃO DE SUSCEPTORES Open
Este trabalho consistiu no projeto e construção de um forno de micro-ondas de 2,45 GHz, destinado à avaliação de susceptores a serem utilizados como catalisadores, em temperaturas de 400 a 1.100 ºC. Sua construção baseou-se em simulações f…
View article: Electro-oxidation of ethanol in acid medium using carbon-supported PtRh nanoparticles with (100) preferential orientation
Electro-oxidation of ethanol in acid medium using carbon-supported PtRh nanoparticles with (100) preferential orientation Open
View article: Methane Conversion Under Mild Conditions Using Semiconductors and Metal-Semiconductors as Heterogeneous Photocatalysts: State of the Art and Challenges
Methane Conversion Under Mild Conditions Using Semiconductors and Metal-Semiconductors as Heterogeneous Photocatalysts: State of the Art and Challenges Open
The processes currently used in the chemical industry for methane conversion into fuels and chemicals operate under extreme conditions like high temperatures and pressures. In this sense, the search for methane conversion under mild condit…
View article: AuCu/TiO2 Catalysts prepared using electron beam irradiation for the preferential oxidation of carbon monoxide in hydrogen-rich mixtures
AuCu/TiO2 Catalysts prepared using electron beam irradiation for the preferential oxidation of carbon monoxide in hydrogen-rich mixtures Open
The major part of the world production of hydrogen (H2) is originated from a combination of methane steam reforming and water-gas shift reaction resulting in an H2-rich mixture known as reformate gas, which contains about 1% vol (10,000 pp…
View article: One-Step synthesis of PtFe/CeO2 catalyst for the Co-Preferential oxidation reaction at low temperatures
One-Step synthesis of PtFe/CeO2 catalyst for the Co-Preferential oxidation reaction at low temperatures Open
View article: Influence of carbon source in the properties of Ni/Carbon prepared by hydrothermal carbonization and thermal treatment and used as supports for PtRu/C electrocatalysts
Influence of carbon source in the properties of Ni/Carbon prepared by hydrothermal carbonization and thermal treatment and used as supports for PtRu/C electrocatalysts Open
In this work, Ni/Carbon hybrids were prepared in two steps (hydrothermal carbonization and thermal treatment at 900 °C under argon atmosphere) using different carbon souces: glucose, starch and cellulose. PtRu/C electrocatalysts were prepa…
View article: Síntese e caracterização de híbridos PtRu/Carbono com diferentes cargas metálicas pelo método da carbonização hidrotérmica
Síntese e caracterização de híbridos PtRu/Carbono com diferentes cargas metálicas pelo método da carbonização hidrotérmica Open
PtRu/Carbon hybrid materials with different metallic loadings (5, 10 and 20 wt%) were prepared by hydrothermal carbonization using cellulose as carbon source and reducing agent and H2PtCl6.6H2O and RuCl3.xH2O as metals sources and catalyst…
View article: Influência da fonte de carbono nas propriedades de híbridos Ni/Carbono preparados por carbonização hidrotérmica e tratamento térmico e utilizados como suportes para eletrocatalisadores PtRu/C
Influência da fonte de carbono nas propriedades de híbridos Ni/Carbono preparados por carbonização hidrotérmica e tratamento térmico e utilizados como suportes para eletrocatalisadores PtRu/C Open
RESUMO Neste trabalho, híbridos Ni/Carbono foram preparados em duas etapas (carbonização hidrotérmica e tratamento térmico a 900 °C sob argônio) a partir de diferentes fontes de carbono: glicose, amido e celulose. Eletrocatalisadores PtRu/…
View article: IPEN e a nanotecnologia
IPEN e a nanotecnologia Open
Submitted by Pedro Silva Filho ([email protected]) on 2020-10-06T18:41:35Z
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View article: One-Step Synthesis of AuCu/TiO2 Catalysts for CO Preferential Oxidation
One-Step Synthesis of AuCu/TiO2 Catalysts for CO Preferential Oxidation Open
Au/TiO2 (1wt% Au), Cu/TiO2 (1wt% Cu) and AuCu/TiO2 (1wt% AuCu) catalysts with different Au:Cu mass ratios were prepared in one-step synthesis using sodium borohydride as reducing agent. The resulting catalysts were characterized by X-ray d…
View article: Au/TiO2 catalysts prepared by borohydride reduction for preferential CO oxidation at near-ambient temperature
Au/TiO2 catalysts prepared by borohydride reduction for preferential CO oxidation at near-ambient temperature Open
Au nanoparticles were prepared in solution using HAuCl 4 .3H 2 O as Au precursor, sodium citrate as stabilizing agent and sodium borohydride as reducing agent. The influence of synthesis parameters such as BH 4 :Au and Citrate:Au ratios we…
View article: Glycerol and Ethanol Oxidation in Alkaline Medium Using PtCu/C Electrocatalysts
Glycerol and Ethanol Oxidation in Alkaline Medium Using PtCu/C Electrocatalysts Open
Submitted by Marco Antonio Oliveira da Silva ([email protected]) on 2018-07-20T11:34:36Z\nNo. of bitstreams: 1\n24771.pdf: 1027312 bytes, checksum: 624b0aac44a6a5ab417cdb363be8c86b (MD5)
View article: Preparation of Au/TiO2 Catalyst by a Liquid-Phase Reduction Method for Preferential Oxidation of Carbon Monoxide in a Hydrogen Rich-Stream (CO-PROX reaction)
Preparation of Au/TiO2 Catalyst by a Liquid-Phase Reduction Method for Preferential Oxidation of Carbon Monoxide in a Hydrogen Rich-Stream (CO-PROX reaction) Open
Au nanoparticles supported on TiO2 were prepared by a liquid-phase reduction method using HAuCl4.3H2O as the Au precursor, TiO2 as the support, a solution of ethylene glycol/water as solvent and reducing agent and sodium citrate as reducin…
View article: Preparation of Au/TiO2 Catalyst by a Liquid-Phase Reduction Method for Preferential Oxidation of Carbon Monoxide in a Hydrogen Rich-Stream (CO-PROX reaction)
Preparation of Au/TiO2 Catalyst by a Liquid-Phase Reduction Method for Preferential Oxidation of Carbon Monoxide in a Hydrogen Rich-Stream (CO-PROX reaction) Open
Au nanoparticles supported on TiO2 were prepared by a liquid-phase reduction method using HAuCl4.3H2O as the Au precursor, TiO2 as the support, a solution of ethylene glycol/water as solvent and reducing agent and sodium citrate as reducin…
View article: Palladium nanoparticles supported on phosphorus-doped carbon for ethanol electro-oxidation in alkaline media
Palladium nanoparticles supported on phosphorus-doped carbon for ethanol electro-oxidation in alkaline media Open
View article: Synthesis of Pt+SnO2/C electrocatalysts containing Pt nanoparticles with preferential (100) orientation for direct ethanol fuel cell
Synthesis of Pt+SnO2/C electrocatalysts containing Pt nanoparticles with preferential (100) orientation for direct ethanol fuel cell Open
Submitted by Marco Antonio Oliveira da Silva ([email protected]) on 2017-09-14T12:59:59Z
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View article: Fuel cell and electrochemical studies of the ethanol electro-oxidation in alkaline media using PtAuIr/C as anodes
Fuel cell and electrochemical studies of the ethanol electro-oxidation in alkaline media using PtAuIr/C as anodes Open
View article: Preparation of PtRu/C Electrocatalysts by Borohydride Reduction for Methanol Oxidation in Acidic and Alkaline Medium
Preparation of PtRu/C Electrocatalysts by Borohydride Reduction for Methanol Oxidation in Acidic and Alkaline Medium Open
View article: Preparation of Au/TiO2 Catalyst by a Liquid-Phase Reduction Method for Preferential Oxidation of Carbon Monoxide in a Hydrogen Rich-Stream (CO-PROX reaction)
Preparation of Au/TiO2 Catalyst by a Liquid-Phase Reduction Method for Preferential Oxidation of Carbon Monoxide in a Hydrogen Rich-Stream (CO-PROX reaction) Open
Au nanoparticles supported on TiO2 were prepared by a liquid-phase reduction method using HAuCl4.3H2O as the Au precursor, TiO2 as the support, a solution of ethylene glycol/water as solvent and reducing agent and sodium citrate as reducin…
View article: Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts Open
View article: Effects of Solvent and Concentration of Borohydride for the Preparation of PtRu/C Electrocatalysts for Direct Methanol Fuel Cell Anodes - A Factorial Design Study
Effects of Solvent and Concentration of Borohydride for the Preparation of PtRu/C Electrocatalysts for Direct Methanol Fuel Cell Anodes - A Factorial Design Study Open
A factorial design study was performed to evaluate the influence of the BH 4 - :PtRu molar ratio (5 and 15) and the solvent (water or isopropyl alcohol) in the preparation of PtRu/C electrocatalysts for Direct Methanol Fuel Cell (DMFC) ano…
View article: Pd-Based Electrocatalysts Prepared by Borohydride Reduction Method for Methanol and Ethanol Electro-Oxidation in Alkaline Medium
Pd-Based Electrocatalysts Prepared by Borohydride Reduction Method for Methanol and Ethanol Electro-Oxidation in Alkaline Medium Open
Pd/C, Au/C, AuBi/C, PdAu/C, PdAuBi/C electrocatalysts (with different atomic ratios and 20 wt% of metal loading) were prepared by borohydride reduction method using a water/2-propanol mixture as solvent, Pd (NO 3 ) 2 .2H 2 O, HAuCl 4 .3H 2…
View article: Production of Biochar, Bio-Oil and Synthesis Gas from Cashew Nut Shell by Slow Pyrolysis
Production of Biochar, Bio-Oil and Synthesis Gas from Cashew Nut Shell by Slow Pyrolysis Open
Submitted by Marco Antonio Oliveira da Silva ([email protected]) on 2017-09-26T13:53:37Z No. of bitstreams: 1 23088.pdf: 1005248 bytes, checksum: 25b2718a5fce0ebd45e889c0f54d11f5 (MD5)
View article: PtBi/C Electrocatalysts for Formic Acid Electro-Oxidation in Acid and Alkaline Electrolyte
PtBi/C Electrocatalysts for Formic Acid Electro-Oxidation in Acid and Alkaline Electrolyte Open
Pt/C and PtBi/C with different PtBi atomic ratio (90:10, 80:20, 70:30, 60:40 and 50:50) were prepared by borohydride reduction method using H2PtCl6·6H2O and Bi(NO3)3·5H2O as metal sources and Vulcan XC72 as carbon support. The electrocatal…
View article: Oxidation of ammonia using PtRh/C electrocatalysts: Fuel cell and electrochemical evaluation
Oxidation of ammonia using PtRh/C electrocatalysts: Fuel cell and electrochemical evaluation Open
View article: Electrochemical and in situ ATR-FTIR studies of ethanol electro-oxidation in alkaline medium using PtRh/C electrocatalysts
Electrochemical and in situ ATR-FTIR studies of ethanol electro-oxidation in alkaline medium using PtRh/C electrocatalysts Open
Pt/C, Rh/C and PtRh/C electrocatalysts with different Pt:Rh atomic ratios supported on Vulcan XC 72 carbon were prepared using borohydride as reducing agent and tested for ethanol electro-oxidation in alkaline medium. X-ray diffraction pat…