A5065100389- Catalytic Processes in Materials Science
- Magnetic properties of thin films
- Electrocatalysts for Energy Conversion
- Magnetic Properties and Applications
- Supercapacitor Materials and Fabrication
- Electrochemical Analysis and Applications
- Nanomaterials for catalytic reactions
- Metallic Glasses and Amorphous Alloys
- Copper-based nanomaterials and applications
- Advanced battery technologies research
- Catalysis and Hydrodesulfurization Studies
- Nanocluster Synthesis and Applications
- Hydrogen Storage and Materials
- Theoretical and Computational Physics
- Ammonia Synthesis and Nitrogen Reduction
- Chalcogenide Semiconductor Thin Films
- Catalysis and Oxidation Reactions
- Arsenic contamination and mitigation
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Clay minerals and soil interactions
- Hybrid Renewable Energy Systems
- Nanoporous metals and alloys
- Environmental remediation with nanomaterials
- Advanced biosensing and bioanalysis techniques
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
2016-2025
Consejo Nacional de Investigaciones Científicas y Técnicas
2016-2025
Universidad Nacional de La Plata
2015-2025
Centro Científico Tecnológico - La Plata
2017-2019
Centro Científico Tecnológico - Tucumán
2018
National Geospatial-Intelligence Agency
2016
Center for Collaborative Education
2016
Instituto de Física La Plata
2004-2010
Catalysts based on Na–mordenite (symbolized as "M") exchanged with 5, 10, and 15 wt % of Ag were characterized by X-ray photoelectron spectroscopy (XPS), extended absorption fine line structure (EXAFS), near edge (XANES) UV–vis diffuse reflectance (DRS) to investigate the effect different treatments chemical state surface concentration silver species. The AgxM catalysts analyzed in oxidizing (O2) or reducing (H2/Ar) atmospheres also after being used selective catalytic reduction NOx...
Heterogeneous photocatalytic reduction of As(V) and As(III) at different concentrations over TiO(2) under UV light in deoxygenated aqueous suspensions is described. For the first time, As(0) was unambiguously identified together with arsine (AsH(3)) as reaction products. requires presence an electron donor (methanol present case) takes place through hydroxymethyl radical formed from methanol oxidation by holes or hydroxyl radicals. On contrary, direct TiO(2)-conduction band electrons....
Abstract The system Mg(NH 2 ) + 2LiH is considered as an interesting solid-state hydrogen storage material owing to its low thermodynamic stability of ca. 40 kJ/mol H and high gravimetric capacity 5.6 wt.%. However, kinetic barriers lead slow absorption/desorption rates even at relatively temperatures (>180 °C). In this work, we investigate the effects addition K-modified Li x Ti y O z on behaviour system. comparison with pristine 2LiH, containing a tiny amount nanostructured shows...
Cobalt-based layered hydroxides (LHs) stand out as one of the best families electroactive materials for alkaline oxygen evolution reaction (OER). However, fundamental aspects such influence crystalline structure and its connection with geometry catalytic sites remain poorly understood. Thus, to address this topic, we have conducted a thorough experimental in silico study on most important divalent Co-based LHs (i.e., α-LH, β-LH, LDH), which allows us understand role coordination environment...
Aiming to improve the hydrogen storage properties of 2LiH + MgB<sub>2</sub>(Li-RHC), effect the<italic>in situ</italic>formed and low cost Li<sub>x</sub>TiO<sub>2</sub>is investigated.
The properties of two hybrid nanoarchaeosomes (hybrid nanoARCs) made archaeolipids extracted from the halophilic archaea Halorubrum tebenquichense and combining archaeolipid bilayers with metallic nanoparticles are explored here. BS-nanoARC, consisting a nanoARC loaded yerba mate (Ilex paraguariensis) extract (YME)-biogenic silver (BSs), [BS + BS-nanoARC], consistent BS-nanoARC core covered by an outer shell BSs, were structurally characterized their therapeutic activities screened. By...
Synthetic talc is a new filler of industrial interest due to its submicron size, chemical and mineral purity, hydrophilic character. To develop this on preindustrial scale, work aimed understand the mechanisms transformation from amorphous precursor crystalline synthetic talc. X-ray diffraction, Fourier transform infrared spectroscopy, extended absorption fine structure at Ni–K edge techniques were used study Ni-talc series composed sample samples synthesized 100, 200, 300 °C for 1 or 6 h....
We present results from four independent models of a granular assembly subjected to tapping. find that the steady-state packing fraction as function tapping intensity is nonmonotonic. In particular, for high intensities, we observe an increase with strength. This finding challenges current understanding compaction media since believed decrease monotonically increasing intensity. propose explanation our based on properties arches formed by particles.
A controlled architecture of nanoelectrodes, a similar size to small molecule-binding aptamers, is synthesized inside nanoporous alumina. Gold nanoparticles with (about 2 nm) are electrogenerated in the alumina cavities, showing fast electron transfer process toward ferrocyanide. These uncapped easily modified thiol-containing aptamer for label-free detection adenosine monophosphate by electrochemical impedance spectroscopy. Our results show that use limited electrical conducting surface an...
Mg2FeH6 is regarded as potential hydrogen and thermochemical storage medium due to its high volumetric (150 kg/m3) energy (0.49 kWh/L) densities. In this work, the mechanism of formation under equilibrium conditions thoroughly investigated applying measurements, X-ray diffraction (XRD), absorption near edge structure (XANES), combination scanning transmission electron microscopy (STEM) with energy-dispersive spectroscopy (EDS) high-resolution (HR-TEM). Starting from a 2Mg:Fe stoichiometric...
The aggregation of Ag<sub>2</sub>S NCs produced by heat-up is removed a hot injection route that allows further surface treatments to produce Ag<sub>2</sub>S/Ag<sub>2</sub>(S,Se) NCs.
Abstract Co‐ and Ni‐based layered hydroxides constitute a unique class of two‐dimensional inorganic materials with exceptional chemical diversity, physicochemical properties outstanding performance as supercapacitors overall water splitting catalysts. Recently, the occurrence Co(III) in these phases has been proposed key factor that enhance their electrochemical performance. However, origin this centers control over its contents remains an open question. We employed Epoxide Route to...
The aim of this work is to evaluate the catalytic properties (activity, selectivity, and stability) PtNi catalysts supported on Ce–Zr−α-Al2O3 (CZA) in liquid-phase conversion glycerol relate them results EXAFS characterization. PtNi/CZA catalyst presents highest global activity promotes formation liquid oxygenated hydrocarbons, mainly acetol 1,2-propylene glycol, which are formed from hydrogenolysis. By means studies, it was determined that three phases present: a PtNi3 nanoalloy, unalloyed...
Nanoelectrode arrays have introduced a complete new battery of devices with fascinating electrocatalytic, sensitivity, and selectivity properties. To understand predict the electrochemical response these arrays, theoretical framework is needed. Cyclic voltammetry well-fitted experimental technique to undergoing diffusion kinetics processes. Previous works describing microelectrode exploited interelectrode distance simulate its behavior as summation individual electrodes. This approach...
Research on two-dimensional materials is one of the most relevant fields in science. Layered double hydroxides (LDHs), a versatile class anionic clays, exhibit great potential photocatalysis, energy storage and conversion, environmental applications. However, its implementation real-life devices requires development efficient reproducible large-scale synthesis processes. Unfortunately, reliable methods that allow for production large quantities LDHs with well-defined morphologies high...
Nickel-based layered hydroxides (LHs) are a family of efficient electrocatalysts for the alkaline oxygen evolution reaction (OER). Nevertheless, fundamental aspects such as influence crystalline structure and role lattice distortion catalytic sites remain poorly understood typically muddled. Herein, we carried out comprehensive investigation on ɑ-LH, β-LH double hydroxide (LDH) phases by means structural, spectroscopical, in-silico electrochemical studies, which suggest key aspect exerted...
Fil: Crespi, Julieta. Comision Nacional de Energia Atomica. Gerencia del Area Seguridad Nuclear y Ambiente. Quimica (CAC); Argentina. Universidad San Martin. Instituto Sabato; Consejo Investigaciones Cientificas Tecnicas; Argentina