A5087133615- Inorganic Chemistry and Materials
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Advancements in Solid Oxide Fuel Cells
- Advanced Thermoelectric Materials and Devices
- Recycling and Waste Management Techniques
- Catalytic Processes in Materials Science
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Advanced Photocatalysis Techniques
- X-ray Diffraction in Crystallography
- Thermal Expansion and Ionic Conductivity
- Ferroelectric and Piezoelectric Materials
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Crystallization and Solubility Studies
- Advancements in Battery Materials
- Advanced ceramic materials synthesis
- Ammonia Synthesis and Nitrogen Reduction
- Advanced Condensed Matter Physics
- Extraction and Separation Processes
- Machine Learning in Materials Science
- Hydrogen Storage and Materials
- Chemical Looping and Thermochemical Processes
- Inorganic Fluorides and Related Compounds
Technical University of Darmstadt
2019-2025
Karlsruhe Institute of Technology
2023
University of Stuttgart
2012-2020
Materials Resources (United States)
2020
Instituto de Ciencia de Materiales de Sevilla
2017-2018
Stuttgart Observatory
2017
Abstract Chemical substitution, which can be iso- or heterovalent, is the primary strategy to tailor material properties. There are various ways how a react substitution. Isovalent substitution changes density of states while heterovalent i.e. doping, induce electronic compensation, ionic valence cations anions, result in segregation neutralization dopant. While all these can, principle, occur simultaneously, it often desirable select certain mechanism order determine Being able predict and...
The exponentially increasing demand for lithium‐ion batteries and their limited lifetime lead to a significant increase in spent batteries. With the goal address sustainability recyclability minimize negative effects environment, an efficient process is vital recover valuable materials from by recycling. In this regard, deep eutectic solvents (DESs) have attracted huge interest, due unique ability efficiently extract metals batteries, while also being rendered greener more cost‐effective...
Abstract The integration of membrane separation processes with chemical reactions through oxygen transport dual‐functional reactors has attracted significant attention due to the potential for process intensification, which also can create a synergy between two units. This approach holds promise promoting green chemistry principles by reducing energy consumption and environmental pollution. Despite its potential, comprehensive review recent advancements exploring full (coupling distinct...
Abstract The escalating issue of plastic waste generation has prompted the search for an effective solution to address these challenges. In this study, we present a novel plasma‐enabled strategy rapid breakdown various types wastes, including mixtures, into high‐value carbon nanomaterials and hydrogen. H 2 yield selectivity achieved through implemented catalyst‐free are 14.2 5.9 times higher, respectively, compared those obtained with conventional thermal pyrolysis under similar conditions....
Sb‐substituted Cs 2 AgBiBr 6 single crystals and powders are synthesized by various wet‐chemical routes as well solvent‐free mechanochemical synthesis. Phase purity resulting optical properties of differently absorbers investigated compared. X‐ray diffraction confirms that Sb substitution results in an apparent single‐phase formation with a unit cell shrinkage up to certain limit, which varies depending on the synthesis routes. Questions about phase identification determined raised...
Carbon-rich polymer-derived SiCN ceramic matrix serves as a stabilizing host for sulfur cathodes due to its robust, stress-accommodating properties and well-conductive carbon network. Herein, novel SiCN-BN composites are synthesized through the annealing of alongside boric acid urea. The prepared exhibit significantly improved electrochemical performance after immobilization within resulting composites. Of particular note is material annealed at 950 °C, designated SiCN-BN-950/S. It exhibits...
Abstract In order to gain more information on the formation and decomposition behavior of various iron nitrides from different starting materials in situ neutron diffraction thermal analysis under application gas atmospheres heating rates were carried out. The following phases observed during these investigations: crystalline α‐Fe, γ‐FeN z , γ′‐Fe 4 N y ϵ‐Fe 3 1+ x ζ‐Fe 2 N, FeCl [Fe(NH ) 6 ]Cl Fe(NH Cl amorphous )Cl . data collected high quality, due an optimized experimental setup with a...
Abstract Ideally, once batteries reach their end‐of‐life, they are expected to be collected, dismantled, and converted into black mass (BM), which contains significant amounts of valuable metals. BM can regarded as a sort urban mine, where recyclers extract reintroduce the materials new battery manufacturing. Focusing on BM, this article discusses necessity recovery current recycling situations. Although benefits widely acknowledged, many challenges issues remain. The market is still in its...
Abstract Die stetig steigende Menge an Kunststoffabfällen erfordert effektive Lösungen zur Bewältigung dieser Herausforderung. In Studie stellen wir eine neuartige plasmagestützte Strategie schnellen Zersetzung verschiedener Plastikabfälle, einschließlich Mischungen, in hochwertige Kohlenstoffnanomaterialien und Wasserstoff vor. H 2 ‐Ausbeute die ‐Selektivität, durch katalysatorfreien plasmagestützten Prozesse erzielt wurden, sind 14,2‐ bzw. 5,9‐mal höher als bisher unter ähnlichen...
Abstract In order to perform real‐time studies of solid‐gas reactions involving light elements such as hydrogen and nitrogen, gas pressure flow cells were developed for in situ neutron powder diffraction. The cell is based on a sapphire single crystal tube sample holder provides high quality diffraction patterns with very low background up 16.0 MPa (deuterium) temperatures 400 °C. contains silica container optimized flowing ammonia reaction gas. While it produces higher owing the silica,...
A series of Ba1-xEuxTiO3-δ (0.1 ≤ x 0.9) phases with ∼40 nm particle size were synthesized via a Pechini method followed by annealing and sintering under reducing atmosphere. The effects Eu2+ substitution on the BaTiO3 crystal structure thermoelectric transport properties systematically investigated. According to synchrotron X-ray diffraction data only cubic perovskite structures observed. On local scale below about 20 Å (equal ∼5 unit cells) deviations from model (Pm3[combining macron]m)...
InN crystals with hexagonal shapes were grown from InCl3 and KNH2 in supercritical ammonia at around 280 MPa. For a successful crystal growth molar ratio of the chloride to amide 1:3 was applied, thus providing an essentially ammononeutral milieu. The obtained vary size aspect depending on applied furnace temperature: 663 K platelets up 2 μm diameter, as well rods lengths 4 diameters 1 obtained; 773 grew 2.5 length. By combining both temperature programs, 10 h annealing step temperatures, we...
Integrated life cycle assessment and chemical process development was conducted. The recycling delivers material with primary-like properties reduced environmental impact.
Abstract In order to gain more information on the formation and decomposition behavior of metastable α′′‐Fe 16 N 2 from different starting materials in situ neutron diffraction thermal analysis gas atmospheres heating rates were carried out. Under inert conditions a direct conversion α‐Fe was observed using higher rates, while with lower occurs via γ′‐Fe 4 y . The changes c / ratio α′′‐phase are related subsequent transformation into martensitic α′‐Fe 8 during decomposition. data collected...
The demand to outperform current technologies pushes scientists develop novel strategies, which enable the fabrication of materials with exceptional properties. Along this line, lightweight structural are great interest due their versatile applicability as sensors, catalysts, battery electrodes, and acoustic or mechanical dampers. Here, we report a strategy design ultralight (ρ = 3 mg/cm3) hierarchically structured ceramic scaffolds macroscopic size. Such exhibit reversibility comparable...
Co-substitution of Eu and Nb into insulating CaTiO3 can make it a good n-type potential thermoelectric (TE) material. In the present work, solid solution compounds with nominal composition Ca0.8Eu0.2Ti1–xNbxO3–δ (x = 0.05, 0.08, 0.1, 0.12) were synthesized sintered in different atmospheres, including argon (Ar) forming gas (5 vol% H2 Ar). Notably, reduction effects these atmospheres resulted significant differences phase formation, grain size, oxygen deficiency, TE properties samples....