A5016874688- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Catalytic Processes in Materials Science
- Magnetic and transport properties of perovskites and related materials
- Chemical Looping and Thermochemical Processes
- Molten salt chemistry and electrochemical processes
- Advanced MRI Techniques and Applications
- Quantum Dots Synthesis And Properties
- Extraction and Separation Processes
- Atomic and Subatomic Physics Research
- Phase Change Materials Research
- Chemical Synthesis and Characterization
- Characterization and Applications of Magnetic Nanoparticles
- Pickering emulsions and particle stabilization
- Advanced Thermoelectric Materials and Devices
- Nuclear materials and radiation effects
- Catalysis and Oxidation Reactions
- Recycling and Waste Management Techniques
- Thermal Radiation and Cooling Technologies
- Advanced Battery Materials and Technologies
Leibniz University Hannover
2022-2025
Abstract Textured Nd 2 NiO 4+ δ bulk ceramic membranes are fabricated via slip casting in a 0.9 T magnetic field generated by neodymium magnets. This process aligns the oxide grains with their easy‐magnetization c ‐axis parallel to applied field. Depending on field's direction relative casting, orient either , b ‐plane or normal of disk‐shaped ceramic, thus aligning oxygen permeation direction. Without field, non‐textured membrane is formed. The microstructure and texture meticulously...
Integrated life cycle assessment and chemical process development was conducted. The recycling delivers material with primary-like properties reduced environmental impact.
Abstract Integration of noble metals into semiconductor‐based nanoparticle gel structures facilitates the extraction photoexcited charge carriers upon illumination. While carrier generation takes place in semiconductor component, contact to act as electron sinks. Thus, nature interface between components is essential importance, it dictates characteristics interparticle contact. Here, influence nanoscale building block design on dynamics cryoaerogels consisting CdSe/CdS nanorods and...
Abstract Textured La 2 NiO 4+ δ membranes were fabricated by pressureless sintering in air using uniaxially pressed powder mixtures consisting of fine-grained equiaxial matrix particles and plate-like template varying mass ratios. The particles, obtained molten-flux synthesis, aligned perpendicular to the pressing direction. Subsequent resulted ceramic with enhanced texturing along crystallographic c -axis . X-ray diffraction patterns revealed a direct relationship: higher fraction ceramics,...
La0.6Ca0.4Co1-xFexO3-d in its various compositions has proven to be an excellent CO2-resistant oxygen transport membrane that can used plasma-assisted CO2 conversion. With the goal of incorporating green hydrogen into conversion process, this work takes a step further by investigating compatibility membranes with fed plasma. This will enable carbon monoxide produced reduction process fuels, like methanol. requires tolerant towards reducing conditions hydrogen. The tolerance (x = 0.8) was...
Abstract Sodium cobaltite (Na x CoO 2 ) is one of the most renowned and thermoelectrically promising p ‐type cobalt oxide materials, showing exceptional performance in this domain. Nonetheless, its thermal instability air renders it unsuitable for high‐temperature applications such as energy harvesting from industrial waste heat. To utilize beneficial properties Na , microscale template particles significantly larger size were effectively embedded within a thermally stable Ca 3 Co 4− y O 9+...
Abstract Ruddlesden‐Popper‐type oxides exhibit remarkable chemical stability in comparison to perovskite oxides. However, they display lower oxygen permeability. We present an approach overcome this trade‐off by leveraging the anisotropic properties of Nd 2 NiO 4+ δ . Its ( a,b )‐plane, having diffusion coefficient and surface exchange several orders magnitude higher than its c ‐axis, can be aligned perpendicular gradient partial pressure a magnetic field (0.81 T). A stable high flux 1.40 mL...
La2NiO4+δ particles with a plate-like morphology were prepared from NaOH melt by molten-flux synthesis. For this purpose, the intermediates sol–gel process used as reactants. Using powder X-ray diffraction, identified mixture of tetragonal La2O2CO3 and cubic NiO. The existence NiO was also confirmed transmission electron microscopy in combination electron-energy loss spectroscopy. ultrafine mixed then additional water nickel crucible heated to 673 K for 8 h. chemical reactions air during...
Abstract Ruddlesden‐Popper‐type oxides exhibit remarkable chemical stability in comparison to perovskite oxides. However, they display lower oxygen permeability. We present an approach overcome this trade‐off by leveraging the anisotropic properties of Nd 2 NiO 4+ δ . Its ( a,b )‐plane, having diffusion coefficient and surface exchange several orders magnitude higher than its c ‐axis, can be aligned perpendicular gradient partial pressure a magnetic field (0.81 T). A stable high flux 1.40 mL...
Graphical Abstract The Ruddlesden–Popper oxide Nd2NiO4+δ exhibits magnetic anisotropy and oxygen transport anisotropy. Its (a,b)-plane, having diffusion coefficient surface exchange several orders of magnitude higher than its c-axis, can be aligned perpendicular to the gradient partial pressure by a field generated permanent magnets. grain-oriented membrane has an flux five times that random oriented membrane, as reported Zhijun Zhao, Armin Feldhoff et al. in their Communication (e202312473).
The performance focussed materials development needs incorporation of sustainability measures allowing greater emphasis on recycling processes with careful insight into environmental hazards and human health. This can be enabled by integrating well established scientific methods for impact assessment such as life cycle (LCA) the at an early stage. A similar approach was adapted in this study hydrogen tolerant La0.6Ca0.4Co0.2Fe0.8O3–d oxygen transport membranes that have great potential...
Due to its high chemical and thermal stability in CO 2 atmosphere anisotropic crystal structure, the Ruddlesden-Popper phase La NiO 4+ δ has attracted considerable attention research field of oxygen-transporting membranes. The properties can be exploited textured polycrystalline membranes control oxygen diffusion through this material. To fabricate membranes, powder mixtures consisting fine-grained equiaxial matrix particles large plate-like template different mass ratios were uniaxially...