A5089608669- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Catalytic Processes in Materials Science
- Electrochemical Analysis and Applications
- Advanced battery technologies research
- Advanced Photocatalysis Techniques
- Ammonia Synthesis and Nitrogen Reduction
- Catalysis and Oxidation Reactions
- Supercapacitor Materials and Fabrication
- Concrete Corrosion and Durability
- Corrosion Behavior and Inhibition
- CO2 Reduction Techniques and Catalysts
- Hydrogen embrittlement and corrosion behaviors in metals
- Nanomaterials for catalytic reactions
- Gas Sensing Nanomaterials and Sensors
- Advancements in Solid Oxide Fuel Cells
- Chemical Synthesis and Characterization
- Conducting polymers and applications
- Catalysis and Hydrodesulfurization Studies
- Minerals Flotation and Separation Techniques
- Ion-surface interactions and analysis
- Metal Extraction and Bioleaching
- Magnetic and transport properties of perovskites and related materials
- Structural Engineering and Vibration Analysis
- Thermochemical Biomass Conversion Processes
Universidade Federal Fluminense
2018-2025
Instituto de Pesquisas Energéticas e Nucleares
2011-2020
National Nuclear Energy Commission
2011-2020
Eletrobras (Brazil)
2020
Universidade Federal do ABC
2009-2017
University of Ottawa
2016
Centro Universitário da Cidade
2014
A carbon-supported binary Pt3Sn catalyst has been prepared using a modified polymeric precursor method under controlled synthesis conditions. This material was characterized X-ray diffraction (XRD), and the results indicate that 23% (of possible 25%) of Sn is alloyed with Pt, forming dominant phase. Transmission electron microscopy (TEM) shows good dispersion electrocatalyst small particle sizes (3.6 nm ± 1 nm). The polarization curves for direct ethanol fuel cell Pt3Sn/C as anode...
Supermartensitic Stainless Steel (SMSS) might be considered an advance in ordinary martensitic steel grade development, achieved by lowering carbon content and increasing key alloy elements such as nickel molybdenum. Nitrogen may added to improve mechanical resistance through a solid solution and, specific cases, secondary hardening the tempering treatment. Therefore, this work aims investigate how heat treatments affect both hardness degree of sensitization (DOS) SMSS type 13Cr-5Ni-2Mo with...
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 tested for ethanol electro-oxidation in alkaline medium. X-ray diffraction patterns showed the formation of PtRh alloy. Transmission electron micrographs nanoparticles particle sizes between 3 6 nm all materials. Electrochemical experiments (50:50) most promising material electro-oxidation; however, situ ATR-FTIR was observed that...
Pt/C-In2O3.SnO2 electrocatalysts was prepared in the single step using H2PtCl6.6H2O as metal sources, sodium borohydride reducing agent and a physical mixture of 85% Vulcan Carbon XC72 15% In2O3.SnO2 (indium tin oxide – ITO) support. The were characterized by X-ray diffraction transmission electron microscopy, cyclic voltammetry, chronoamperommetry, Attenuated Total Reflectance Fourier transform infrared (ATR-FTIR) spectroscopy performance test on direct ethanol fuel cell. diffractograms...