A5086185136- Ammonia Synthesis and Nitrogen Reduction
- Hydrogen Storage and Materials
- Microstructure and mechanical properties
- Zeolite Catalysis and Synthesis
- Advanced NMR Techniques and Applications
- Hydrocarbon exploration and reservoir analysis
- NMR spectroscopy and applications
- Advanced battery technologies research
- Copper-based nanomaterials and applications
- Muon and positron interactions and applications
- Hybrid Renewable Energy Systems
- Thin-Film Transistor Technologies
- Aluminum Alloy Microstructure Properties
- Advancements in Battery Materials
- Advanced Photocatalysis Techniques
- Silicone and Siloxane Chemistry
- Mesoporous Materials and Catalysis
- Nanopore and Nanochannel Transport Studies
- Superconductivity in MgB2 and Alloys
- Electrocatalysts for Energy Conversion
- Advanced Battery Technologies Research
- Aluminum Alloys Composites Properties
- Synthesis and characterization of novel inorganic/organometallic compounds
- Fuel Cells and Related Materials
- Glass properties and applications
Humboldt-Universität zu Berlin
2017-2022
Helmholtz-Zentrum Berlin für Materialien und Energie
2019-2022
Solid-state hydride compounds are a promising option for efficient and safe hydrogen-storage systems. Lithium reactive composite system 2LiBH4 + MgH2/2LiH MgB2 (Li-RHC) has been widely investigated owing to its high theoretical capacity low calculated reaction enthalpy (11.5 wt % H2 45.9 kJ/mol H2). In this paper, thorough investigation into the effect of formation nano-TiAl alloys on properties Li-RHC is presented. The additive 3TiCl3·AlCl3 used as nanoparticle precursor. For temperatures...
Polymer electrolyte fuel cells (PEFCs) offer an efficient way of chemical-to-electrical energy conversion that could drastically reduce the environmental footprint mobility and stationary supply sectors, respectively. However, PEFCs can suffer from severe degradation during start/stop events, when cathode catalyst is transiently exposed to very high potentials. In attempt mitigate corrosion conventional carbon support materials for Pt nanoparticles under these conditions, conductive metal...
In this work, we study the electronic and atomic structural modifications occurring in TiO2 anatase nanoparticles as anode materials Na-ion batteries upon sodiation desodiation. The investigation is performed over both long- short-range order by combining a comprehensive extended X-ray absorption fine structure (EXAFS) characterization with diffraction (XRD). evolution of cycling qualitatively investigated near-edge (XANES) analysis. goal work to correlate outstanding electrochemical...
The nanostructure of hydrogenated amorphous silicon (a-$\mathrm{Si}\ensuremath{\mathbin:}\mathrm{H}$) is studied by a combination small-angle x-ray scattering (SAXS) and neutron (SANS) with spatial resolution 0.8 nm. a-$\mathrm{Si}\ensuremath{\mathbin:}\mathrm{H}$ materials were deposited using range widely varied conditions are representative for this class materials. We identify two different phases that embedded in the matrix quantified both according to their cross sections. First, 1.2...
Precipitation hardening involves solutionising, quenching and annealing steps, the latter often at various temperatures. The phenomena observed in Al-Mg-Si alloys are very complicated partially not well understood. During after quenching, solute atoms diffuse through lattice assisted by vacancies form atom clusters that gradually grow. These act back onto vacancies, which complicates situation. We apply positron annihilation techniques addition to traditional hardness, resistivity thermal...
Abstract In this study two hybrid organic–inorganic ureasilicate monomers with different length of polymer segments were chosen for preparation sol–gel material that includes moieties blended on the molecular scale. The first monomer was obtained by crosslinking a double terminated polyoxyalkyleneamine an isocyanate modified silicone ethoxide and second one – between amino ethoxide. Sol–gel route applied transformation liquid blends in transparent materials varying degree rigidity. prepared...
The morphology and structural changes of confined matter are still far from being understood. This report deals with the development a novel in situ method based on combination anomalous small-angle X-ray scattering (ASAXS) absorption near edge structure (XANES) spectroscopy to directly probe evolution xenon adsorbate phase mesoporous silicon during gas adsorption at 165 K. interface area size were determined via ASAXS demonstrating that filling emptying pores follow two distinct mechanisms....
Abstract In recent years, many solid-state hydride-based materials have been considered as hydrogen storage systems for mobile and stationary applications. Due to a gravimetric capacity of 5.6 wt% dehydrogenation enthalpy 38.9 kJ/mol H 2 , Mg(NH ) + 2LiH is potential material be coupled with PEM fuel cell devices. One the main challenges reduction temperature since this system requires high temperatures (~ 200 °C). The addition KH significantly decreases onset 130 °C. On one hand, stabilizes...
Mesoporous materials are excellent to be used in energy and environmental related applications.Methods characterize the pore structures filling emptying processes physisorption small-angle scattering.Gas mesoporous associated capillary hysteresis intrigue scientific community since decades.These phenomena largely exploited for characterization of porous solids, which justify strong need their complete understanding.To date, major hurdle lies a reliable description state confined fluid, is...