A5060348581- Metal-Organic Frameworks: Synthesis and Applications
- Fuel Cells and Related Materials
- Nanoparticles: synthesis and applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Adsorption and biosorption for pollutant removal
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Advanced Nanomaterials in Catalysis
- Hydrogen Storage and Materials
- Analytical chemistry methods development
- Hybrid Renewable Energy Systems
- Advanced battery technologies research
- Extraction and Separation Processes
- Nanomaterials for catalytic reactions
- Graphene and Nanomaterials Applications
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Electrospun Nanofibers in Biomedical Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Fiber-reinforced polymer composites
- Layered Double Hydroxides Synthesis and Applications
- Magnesium Oxide Properties and Applications
- Dyeing and Modifying Textile Fibers
Forschungszentrum Jülich
2025
Paderborn University
2018-2023
Kohat University of Science and Technology
2016-2022
Faradaic reactions including charge transfer are often accompanied with diffusion limitation inside the bulk. Conductive two-dimensional frameworks (2D MOFs) a fast ion transport can combine both-charge and their porous structure. To study remaining limitations caused by particle morphology, different synthesis routes of Cu-2,3,6,7,10,11-hexahydroxytriphenylene (Cu3 (HHTP)2 ), copper-based 2D MOF, used to obtain flake- rod-like MOF particles. Both morphologies systematically characterized...
Herein we present a new proton-conducting iron(II) metal–organic framework (MOF) of an unusual structure formed by chains alternating bistriazolate-p-benzoquinone anions and cations with four axially coordinated water molecules. These assemble via π–π stacking between the aromatic units to form three-dimensional grid-like network channel pores filled The material was structurally characterized single-crystal XRD analysis, its thermal stability investigated. proton conductivity studied...
The removal of dyes from industrial effluents is one the most important processes that currently on academic demand. In this project, for first time, Trachycarpus fortunei seeds are used as biosources synthesis activated carbon (AC) using physical well acid-base chemical methods. synthesized AC was initially characterized by different instrumental techniques, such FTIR, BET isotherm, SEM, EDX and XRD. Then, prepared an economical adsorbent xylenol orange thymol blue aqueous solution....
ABSTRACT Conditioning of the membrane electrode assembly (MEA) is an important step to establish functionality and obtain a consistent performance proton exchange electrolytic cell (PEMEC) when setting it into operation. On laboratory scale in academic context, conditioning encompasses primary pre‐treatment MEA by chemical or thermal procedures under defined mechanical conditions and, secondarily, break‐in procedure, during which PEMEC subjected initial electrical loads before actual This...
Hydrogen and oxygen crossover in polymer electrolyte membrane (PEM) electrolyzers is critical for both operational safety product gas purity. In this study, we present a versatile experimental setup designed to quantify through membranes polymers commonly used PEM electrolyzers. A key feature of the its ability perform situ measurements on fully assembled cells, containing complete electrode assemblies (MEAs). The system also enables characterization permeation wet dry ionomers, as well...
Large Co-MOF-74 crystals of a few hundred micrometers were prepared by solvothermal synthesis, and their structure morphology characterized scanning electron microscopy (SEM), IR, Raman spectroscopy. The hydrothermal stability the material up to 60 °C at 93% relative humidity was verified temperature-dependent XRD. Proton conductivity studied impedance spectroscopy, using single crystal. By varying (70–95%), temperature (21–60 °C), orientation crystal electrical potential, it found that...
Thermally stabilized and subsequently carbonized nanofibers are a promising material for many technical applications in fields such as tissue engineering or energy storage. They can be obtained from variety of different polymer precursors via electrospinning. While some methods have been tested post-carbonization doping with the desired ingredients, very little is known about carbonization blend two more polymeric precursors. In this paper, we report on preparation, thermal treatment...
The reaction of Al 3+ , Ga and Fe salts with the linker H 8 TPPE led to three new isoreticular compounds, structurally characterized from powder X-ray diffraction data, that exhibit different 2 O-sorption, thermal proton conductivity properties.
The proton conduction properties of a phosphonato-sulfonate-based coordination polymer are studied by impedance spectroscopy using single crystal specimen. Two distinct mechanisms identified. Water-mediated conductance along the surface occurs mass transport, as evidenced high activation energy (0.54 eV). In addition, intrinsic 'hopping' through interior with low (0.31 eV) is observed. This latter anisotropic respect to structure and seems occur channel c axis orthorhombic crystal. Proton...
<title>Abstract</title> Proton exchange membrane electrolysis cells (PEMEC) are a key technology for producing “green hydrogen” – sustainable energy carrier and platform synthesizing manifold chemicals. To bolster performance durability of PEMEC accelerate market ramp-up green hydrogen economy, this study aims to elucidate operation-induced changes in an cell operated under realistic conditions over 5,000 hours. This investigation has uncovered new systematic aging phenomenon current...
The potential of activated carbon as a cheap bioadsorbent prepared from Reptonia buxifolia seeds, for the removal Pb(II) wastewater was investigated. morphology and structure characterized using different techniques. Adsorption phenomenon studied by varying metal ion concentration, contact time, temperature, pH, in batch process. SEM results showed that thermal treatment significantly altered topography synthesized due to formation numerous pores on surface adsorbent. At equilibrium,...
Abstract Protic ionic liquids (PILs) being intrinsic proton conducting species are considered as potential green electrolytes for study of electrocatalytic reactions and fabrication IL-based fuel cells (FCs) batteries. We have prepared a sulfate anion based protic liquid (PIL), triethylammonium (TEAS) through reaction involving transfer from H 2 SO 4 to triethylamine (TEA). 1 NMR FT-IR spectroscopic techniques were employed confirmation the synthesis TEAS water content PIL was quantified...
Hair is a waste keratinous biomaterial.
Abstract Faradaysche Prozesse, die mit einem Ladungsübergang einhergehen, unterliegen häufig einer Diffusionslimitierung im Festkörper. Leitfähige zweidimensionale metallorganische Gerüstverbindungen (2D MOFs) schnellem Ionentransport können jedoch beides kombinieren – Ladungstransfer und schnelle Diffusion innerhalb ihrer porösen Struktur. Um verbleibenden Diffusionsbeschränkungen, durch Partikelmorphologie verursacht werden, zu untersuchen, werden verschiedene Synthesewege von...
The proton conductivity of two coordination networks, [Mg(H2O)2(H3L)]·H2O and [Pb2(HL)]·H2O (H5L = (H2O3PCH2)2-NCH2-C6H4-SO3H), is investigated by AC impedance spectroscopy. Both materials contain the same phosphonato-sulfonate linker molecule, but have clearly different crystal structures, which has a strong effect on conductivity. In Mg-based network, dangling sulfonate groups are part an extended hydrogen bonding facilitating "proton hopping" with low activation energy; material shows...
Proton exchange membrane electrolytic cell (PEMEC) is a key technology in the production of sustainable “green” hydrogen. In such systems, as an electrolyte and physical barrier, proton (PEM) applied [1]. Overall, performance PEMEC depends on many factors, catalyst material its loading, thickness electrodes interface roughness for example. While studies have reported changes PEM microstructures, even operando [2], there still limited data regarding process heterogeneity large...