A5091089592- Advancements in Solid Oxide Fuel Cells
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Conducting polymers and applications
- Physics of Superconductivity and Magnetism
- Membrane-based Ion Separation Techniques
- Magnetic properties of thin films
- Transition Metal Oxide Nanomaterials
- Advanced ceramic materials synthesis
- Magnetic Properties and Synthesis of Ferrites
- Advanced Battery Materials and Technologies
- Chemical Looping and Thermochemical Processes
- Analytical Chemistry and Sensors
- Gas Sensing Nanomaterials and Sensors
- Ferroelectric and Piezoelectric Materials
- Catalysis and Hydrodesulfurization Studies
- ZnO doping and properties
- Nanomaterials for catalytic reactions
- Advanced Photocatalysis Techniques
- Catalysts for Methane Reforming
Instituto de Pesquisas Energéticas e Nucleares
2016-2025
National Nuclear Energy Commission
2016-2025
Nuclear Engineering Institute
2016-2023
Energy Research Institute
2023
Université Claude Bernard Lyon 1
2017
Institut de Recherches sur la Catalyse et l'Environnement de Lyon
2017
Centre National de la Recherche Scientifique
2017
Cleveland Clinic
2014
Universidade de São Paulo
2002-2004
Notre Dame of Dadiangas University
2003
We present a detailed study of static and dynamic magnetic behavior Fe3O4 nanoparticles with average particle sizes 〈d〉 ranging from 5 to 150 nm. Bulk-like properties such as saturation magnetization, hyperfine parameters, coercive field, Verwey transition are observed in nm particles. For decreasing size, the temperature, TV, shifts down ∼20 K for 〈d〉=50 is no longer observable smaller The smallest particles (〈d〉=5 nm) display superparamagnetic at room blocked state TB∼45 K, which depends...
We have performed a detailed characterization of the magnetic properties Ni nanoparticles embedded in ${\mathrm{SiO}}_{2}$ amorphous matrix. A modified sol-gel method was employed which resulted particles with average radius $\ensuremath{\sim}3\mathrm{nm},$ as inferred by TEM analysis. Above blocking temperature ${T}_{B}\ensuremath{\approx}20\mathrm{K}$ for most diluted sample, magnetization data show expected scaling ${M/M}_{S}$ vs $H/T$ curves superparamagnetic particles. The hysteresis...
Significance Oxygen delivery by RBC Hb is essential for life. Just three amino acids in are conserved all mammals and birds, but only two of those required to carry oxygen. The third, a Cys within the β-chain, βCys93, has been assigned role carrying nitric oxide, which mediates vasodilation. However, physiological importance RBC-mediated vasoregulation unknown. We show that blood flow tissue oxygenation markedly impaired mice with βCys93Ala mutation. mutation also results myocardial...
Nafion/titania-based fillers composites are prepared by casting and tested in proton exchange membrane fuel cells (PEMFCs) operating at elevated temperatures (130 °C). Three types of titania-based studied: nanoparticles with nearly spherical shape, mesoporous particles high surface area, hydrogen titanate nanotubes. Properties related to PEMFC operation, such as water absorption/retention conductivity, determined correlated microstructural data obtained small-angle X-ray scattering. The...
The proton transport properties of Nafion membranes were studied in a wide range temperature by using an air-tight sample holder able to maintain the hydrated at high relative humidity. conductivity continuously increased 40–180 °C with humidity kept RH = 100%. In 40–90 °C, followed Arrhenius-like thermal dependence. calculated apparent activation energy Ea values are good agreement via structural diffusion absorbed water. However, higher measuring temperatures upturn electrical was observed...
An electrolyte supported solid oxide fuel cell (SOFC) using standard electrodes, doped-lanthanum manganite cathode and Ni-cermet anode, was operated with direct (anhydrous) ethanol for more than 100 h, delivering essentially the same power output as running on hydrogen. A ceria-based layer provides catalytic activity gradual internal reforming, which uses steam formed by electrochemical oxidation of hydrogen decomposition ethanol. Such a concept opens up way multi-fuel SOFCs components layer.
Fast elemental diffusion at the Gd-doped ceria/Y-stabilized zirconia interface occurs under reducing conditions low oxygen activity and high temperatures.
We described the facile synthesis of sub-15 nm CeO<sub>2</sub> nanowires for catalyzing selective nitrosobenzene from aniline at room temperature.
Abstract Methane is the main constituent of natural gas and can be converted in higher value‐added products for electricity cogeneration. It could used as a solid membrane reactor (SMR) application Alkaline Anion‐Exchange Membrane Fuel Cell (AAEMFC). The investigation conversion methane was based on sodium borohydride (NaBH 4 ) method using Pt/C Basf, Pd/C, Ni/C catalysts. electrocatalysts were prepared with 20 wt% metals loading carbon. X‐ray diffraction (XRD) analysis revealed...
The design of nanomaterials by tailoring the size, shape, and surface chemistry has a significant impact on their properties. fine-tuning structural defects ceria rod-like cube-like-shaped nanoparticles was performed via La3+ doping in molar ratios 0–70 mol %. Morphology control achieved varying hydrothermal synthesis temperature. For LaxCe1–xO2–x/2 samples prepared at 110 °C, nanorod-like structures are obtained for x < 0.30 random morphology interconnecting polyhedra is larger x. fluorite...