A5018172983- Iron-based superconductors research
- Advancements in Battery Materials
- Rare-earth and actinide compounds
- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Magnetic and transport properties of perovskites and related materials
- Advanced Battery Materials and Technologies
- Catalytic Processes in Materials Science
- High-pressure geophysics and materials
- Electrocatalysts for Energy Conversion
- Superconductivity in MgB2 and Alloys
- X-ray Diffraction in Crystallography
- Electron and X-Ray Spectroscopy Techniques
- Inorganic Chemistry and Materials
- Corporate Taxation and Avoidance
- Advanced battery technologies research
- Advanced Battery Technologies Research
- CO2 Reduction Techniques and Catalysts
- Advanced Photocatalysis Techniques
- Catalysts for Methane Reforming
- Semiconductor materials and devices
- Intellectual Capital and Performance Analysis
- Electronic and Structural Properties of Oxides
- Transition Metal Oxide Nanomaterials
ALBA Synchrotron (Spain)
2016-2025
Centre for Research on Ecology and Forestry Applications
2020-2025
Centre National de la Recherche Scientifique
2021
Institut des Sciences de la Terre
2021
Université Grenoble Alpes
2021
Université Gustave Eiffel
2021
European Synchrotron Radiation Facility
2010-2020
Central Laboratory For Agricultural Expert Systems
2020
Universitat Autònoma de Barcelona
2014
Universidad de Málaga
2011
Renewable energy-powered water electrolysis and photocatalytic splitting are two promising approaches to green hydrogen production. Electrocatalysts photocatalysts essential components determining the performance of electrolyzers reactors, respectively. Currently, there is a pressing need develop efficient stable electrocatalysts for large-scale deployment these devices reach carbon neutrality. Herein, we report synthesis single-atom Ir Ru anchored on mesoporous graphitic nitride (Ir-g-CN...
Abstract Direct seawater electrolysis is proposed as a potential low‐cost approach to green hydrogen production, taking advantage of the vastly available and large‐scale offshore renewable energy being deployed. However, developing efficient, earth‐abundant electrocatalysts that can survive under harsh corrosive conditions for long time still significant technical challenge. Herein, fabrication self‐supported nickel‐iron phosphosulfide (NiFeSP) nanotube array electrode through two‐step...
Heteroatom-doping has emerged as a transformative approach to producing high-performance catalysts, yet the current trial-and-error optimize these materials remains ineffective. To enable rational design of more efficient models grounded in deeper understanding catalytic mechanisms are essential. Existing models, such d-band center theory, fall short explaining role dopants, particularly when dopants do not directly interact with reactants. In this study, we synthesize various...
We report on the microscopic structure of water at sub- and supercritical conditions studied using X-ray Raman spectroscopy, ab initio molecular dynamics simulations, density functional theory. Systematic changes in spectra with increasing pressure temperature are observed. Throughout thermodynamic range, experimental can be interpreted a structural model obtained from simulations. A spatial statistical analysis Ripley’s K-function shows that this is homogeneous nanometer length scale....
CLÆSS is a general-purpose absorption spectroscopy beamline at the ALBA CELLS Spanish synchrotron. Its optical layout presented here along with its powerful capabilities for collecting spectra high signal to noise ratio in an unusually wide energy range (2.4–63.2 keV). Continuous scanning quick scans available, allowing collect X-ray near edge structure and extended fine 3–5 8–10 min, respectively. The full automatization of allows performing successive measurements different conditions...
Polyanionic materials such as Na3V2(PO4)2F3–yOy (0 ≤ y 2) are of high interest positive electrode for Na-ion batteries since they offer competitive electrochemical performances compared to sodiated transition metal oxides. The composition Na3V2(PO4)2F3 (y = 0) has the highest theoretical energy density among series, but surprisingly a lot discrepancies reported throughout literature considering its structure and properties. We will show that most compounds being Na3VIII2(PO4)2F3 in fact...
Abstract As promising cathode materials, the lithium‐excess 3d‐transition‐metal layered oxides can deliver much higher capacities (>250 mAh g −1 at 0.1 C) than current commercial oxide materials (≈180 used in lithium ion batteries. Unfortunately, original formation mechanism of these during synthesis is not completely elucidated, that is, how and oxygen inserted into matrix structure precursor lithiation reaction? Here, a practical method, coprecipitation route followed by microwave...
An end-station for X-ray Raman scattering spectroscopy at beamline ID20 of the European Synchrotron Radiation Facility is described. This dedicated to study shallow core electronic excitations using non-resonant inelastic scattering. The spectrometer has 72 spherically bent analyzer crystals arranged in six modular groups 12 each a combined maximum flexibility and large solid angle detection. Each modules houses one pixelated area detector allowing based imaging efficient separation desired...
Porous carbon has been widely used as an efficient host to encapsulate highly active molecular sulfur (S) in Li-S and Na-S batteries. However, for these sub-nanosized pores, it is a challenge provide fully accessible sodium ions with unobstructed channels during cycling, particularly high content. It well recognized that solid interphase full coverage over the designed architectures plays critical roles promoting rapid charge transfer stable conversion reactions batteries, whereas...
The niobium oxide polymorph T-Nb2O5 has been extensively investigated in its bulk form especially for applications fast-charging batteries and electrochemical (pseudo)capacitors. Its crystal structure that two-dimensional (2D) layers with very low steric hindrance allows fast Li-ion migration. However, since discovery 1941, the growth of single-crystalline thin films electronic have not yet realized, likely due to large orthorhombic unit cell along existence many polymorphs. Here we...
Zeolites containing Rh single sites stabilized by phosphorous were prepared through a one-pot synthesis method and are shown to have superior activity selectivity for ethylene hydroformylation at low temperature (50 °C). Catalytic is ascribed confined Rh2O3 clusters in the zeolite which evolve under reaction conditions into Rh3+ sites. These effectively Rh-(O)-P structure using tetraethylphosphonium hydroxide as template, generates situ phosphate species after H2 activation. In contrast...
Atomically dispersed dinuclear Ir active sites are synthesized, which show outstanding electrocatalytic performance for the chlorine evolution reaction thanks to favorable Cl adsorption on sites.
A multiple-analyser-crystal spectrometer for non-resonant inelastic X-ray scattering spectroscopy installed at beamline ID16 of the European Synchrotron Radiation Facility is presented. Nine analyser crystals with bending radii R = 1 m measure spectra five different momentum transfer values simultaneously. Using a two-dimensional detector, given by all analysers can be treated individually. The based on Rowland circle design fixed Bragg angles about 88 degrees . energy resolution chosen...
An end-station for resonant inelastic X-ray scattering and (resonant) emission spectroscopy at beamline ID20 of ESRF - The European Synchrotron is presented. spectrometer hosts five crystal analysers in Rowland geometry large solid angle collection mounted on a rotatable arm both the horizontal vertical planes. optimized high-energy-resolution applications, including partial fluorescence yield or detected absorption study elementary electronic excitations solids. In addition, it can be used...
Among the series of polyanionic positive electrodes for sodium-ion batteries having general formula Na3V2(PO4)2F3–yOy (0 ≤ y 2), composition Na3V2(PO4)2F3 (y = 0) has highest theoretical energy that offers competitive electrochemical performances compared to sodium transition metal oxides. Recently, structural phase diagram from Na1V2(PO4)2F3 been thoroughly investigated by operando synchrotron X-ray diffraction revealing an unexpected feature end member composition. In fact, crystal...
The synthesis, characterization and assessment of the antibacterial properties hydrophilic silver nanoparticles (AgNPs) were investigated with aim to probe their suitability for innovative applications in field nanobiotechnology. First, synthetized functionalized two capping agents, namely 3-mercapto-1-propansulfonate (3MPS) 1-β-thio-d-glucose (TG). investigation structural electronic nano-systems was carried out by means X-ray Photoelectron Spectroscopy (XPS) Absorption (XAS). XPS data...
LiNixCoyMn1-x-yO2 (NCM) intercalation compounds with core-shell architecture have been found to be promising cathode candidates for next-generation lithium-ion battery applications. The NCM cathodes' functional properties are dependent on the transition metal relative ratios, making it a challenge control real structure of materials and understand synergistic effect core shell during electrochemical cycling. Herein, universal facile synthetic strategy is developed synthesize material...
Magnetotactic bacteria are aquatic microorganisms with the ability to biomineralise membrane-enclosed magnetic nanoparticles, called magnetosomes. These magnetosomes arranged into a chain that behaves as compass, allowing align in and navigate along Earth's field lines. According magneto-aerotactic hypothesis, purpose of producing is provide more efficient movement within stratified water column, search optimal positions satisfy their nutritional requirements. However, could have other...