A5025523166- Catalysts for Methane Reforming
- Catalytic Processes in Materials Science
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Electrocatalysts for Energy Conversion
- Hydrogen Storage and Materials
- CO2 Reduction Techniques and Catalysts
- Magnetic properties of thin films
- Induction Heating and Inverter Technology
- Characterization and Applications of Magnetic Nanoparticles
- Advanced materials and composites
- Catalysis and Oxidation Reactions
- Subcritical and Supercritical Water Processes
- Carbon dioxide utilization in catalysis
- Magnetic and transport properties of perovskites and related materials
- Catalysis and Hydrodesulfurization Studies
- Membrane-based Ion Separation Techniques
- Quantum, superfluid, helium dynamics
- Physics of Superconductivity and Magnetism
Technical University of Denmark
2018-2024
Abstract The tailored chemical synthesis of binary and ternary alloy nanoparticles with a uniform elemental composition is presented. Their dual use as magnetic susceptors for induction heating catalytic agent steam reforming methane to produce hydrogen at temperatures near above 800 °C demonstrated. performance two chemically synthesized samples CoNi Cu ⊂ are compared held against traditional Ni‐based catalyst. structural, magnetic, properties the were characterized by X‐ray diffraction,...
A series of membranes based on carboxylated polystyrene-b-poly(ethylene-ran-butylene)-b-polystyrene (SEBS) were synthesized via Friedel–Crafts bromoalkylation, substitution with malonate esters, and heterogeneous ester hydrolysis. The physicochemical properties the obtained membranes, including electrolyte uptake, swelling ratio, ionic conductivity, highly affected by degree functionalization concentration aqueous KOH solution. Membranes degrees higher than 100% suffered from excessive poor...
Abstract The tailored chemical synthesis of binary and ternary alloy nanoparticles with a uniform elemental composition is presented. Their dual use as magnetic susceptors for induction heating catalytic agent steam reforming methane to produce hydrogen at temperatures near above 800 °C demonstrated. performance two chemically synthesized samples CoNi Cu ⊂ are compared held against traditional Ni‐based catalyst. structural, magnetic, properties the were characterized by X‐ray diffraction,...
Abstract Ion conducting membranes play a crucial role in redox flow batteries, separating anolyte and catholyte while allowing proton transport to complete the circuit. However, most are trapped trade‐off relation show either low conductivity or high vanadium crossover. This study investigates use of dense sulfonated para ‐polybenzimidazole for batteries (VRFBs), analyzes effects membrane preparation process, thickness operating temperature on VRFB performance. The results demonstrate...
Abstract While anion exchange membrane (AEM) water electrolysis has many advantages, its commercialization is impeded by the low alkaline stability of most AEM, due to fragility quaternary ammonium groups. Ion solvating membranes (ISM) can be an alternative, but so far require high concentrations. Here, it shown that sulfonation polybenzimidazole results in ISM which swell strongly 1 m KOH. Crosslinking with dibromoxylene controls swelling, and after activation conductivities >100 mS cm...
According to the classical laws of magnetism, shape magnetically soft objects limits effective susceptibility. For example, spherical magnets cannot display an susceptibility larger than 3. Although true for macroscopic multi-domain magnetic materials, we show that nanoparticles in a single-domain state do not suffer from this limitation. We find differences between demagnetisation factors along principal axes are relevant and can influence particles, but limit as case particles. validate...
Induction heating by magnetic hysteresis of nanoparticles inside chemical reactors is an interesting approach for direct and electrified high-temperature endothermic catalytic reactions. Here, we show how it possible to tune the induction steam methane reforming use alumina-supported CoxNi(100–x) with well-defined alloy compositions from x = 20 90. The ∼30 nm Co–Ni particles function both as a catalyst susceptor. We find that increases increasing Ni content at lower temperatures smaller...
Abstract Non‐fluorinated ion exchange membranes with high proton selectivity and conductivity are sought as separators for vanadium redox flow batteries (VRFB) to substitute the typically used perfluorosulfonic acid (PFSA) polymer membranes. Polybenzimidazole based offer a promising non‐fluorinated alternative due their excellent thermomechanical properties, low crossover, ionic in acidic media. In this work, series of polybenzimidazole‐polyvinylchloride blends were cast decorated different...
The use of naturally occurring quinones to produce more sustainable electrolytes for renewable energy storage in redox flow batteries (RFBs) is still a new and rarely investigated subject. In this study, we demonstrate how the putative phoenicin its dimer (diphoenicin) influence capacity performance as negolyte battery. To do this, biosynthesized by cultivating filamentous fungus Penicillium phoeniceum resulting fungal extract contained multiple metabolites, putatively related phoenicin,...
We have developed an in situ sample-holder-akin to a quartz-based plug-flow reactor-for vibrating sample magnetometry (VSM) gas-controlled environments at ambient pressure and temperatures up ∼1000 °C. The holder matches onto specific type of magnetometer (Lake Shore model 7404-S), but the principles are applicable other types VSM. has been tested on powder samples Co particles MgAl2O4 support both reducing oxidizing atmospheres. results show control gas composition reduction/oxidation. In...