A5076023279- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Organic Electronics and Photovoltaics
- Synthetic Organic Chemistry Methods
- Vehicle emissions and performance
- Advanced Combustion Engine Technologies
- Molecular Junctions and Nanostructures
- Electric and Hybrid Vehicle Technologies
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Laser-induced spectroscopy and plasma
- Synthesis and Properties of Aromatic Compounds
- Advanced Battery Materials and Technologies
- Luminescence and Fluorescent Materials
- Asymmetric Synthesis and Catalysis
- Power Line Communications and Noise
- Electron Spin Resonance Studies
- Plasma Applications and Diagnostics
- Criminal Law and Policy
- RNA modifications and cancer
- Photoacoustic and Ultrasonic Imaging
- Ionic liquids properties and applications
University of Bayreuth
1979-2023
Heidelberg University
1997-2021
Technische Universität Braunschweig
2011
Technical University of Munich
1979
Ag catalysts show high selectivities in the conversion of carbon dioxide to monoxide during electrochemical reduction reaction (CO2RR). Indeed, highly catalytically active porous electrodes with increased surface area achieve faradaic efficiencies close 100%. To establish reliable structure-property relationships, results qualitative structural analysis need be complemented by a more quantitative approach assess overall picture. In this paper, we present combination suitable methods...
Metal-based gas diffusion electrodes are utilized in chlor-alkali electrolysis or electrochemical reduction of carbon dioxide, allowing the reaction to proceed at high current densities. In contrast planar and predominantly 2D designs, industrially required densities can be achieved by intense contact between liquid phase with catalytically active surfaces. An essential asset for knowledge-based design tailored is therefore in-depth information on electrolyte distribution intrusion into...
One of the challenges high-temperature polymer electrolyte membrane fuel cells is poisoning Pt catalyst with H3PO4. H3PO4 imbibed into routinely used polybenzimidazole-based membranes, which facilitate proton conductivity in temperature range 120–200 °C. However, when leached out by water produced during operation, adsorbs on surface, blocking active sites and hindering oxygen reduction reaction (ORR). The to H3PO3, occurs at anode due a combination low potential presence gaseous H2, has...
Abstract N‐Heteropolycycles are among the most promising candidates for applications in organic devices. For this purpose, a profound understanding of low‐energy electronic absorbance and emission characteristics is crucial importance. Herein, we report high‐resolution fluorescence spectra pentacene ( PEN ) 6,13‐diazapentacene DAP solid neon obtained using matrix‐isolation technique. Accompanying DFT calculations allow assignment specific vibrationally resolved signals to corresponding...
This paper presents performance evaluation results of different linear diversity combining techniques that have been applied to IEEE 802.11p based Car-to-X (C2X) communication systems. More precisely, we employed the Selection Combining (SC), Equal Gain (EGC) and Maximum Ratio (MRC) algorithms systems with multiple receiver antennas compared resulting single-receive antenna Concerning great challenges typical C2X propagation channels go along a strong time variance long multipath delays, use...
The synthesis, property evaluation, and single crystal X-ray structures of four 5,7,12,14-tetrafunctionalized diazapentacenes are presented. synthesis these compounds either starts from tetrabromo-N,N-dihydrodiazapentacene or a diazapentacene tetraketone. Pd-catalyzed coupling addition lithium acetylide gave the precursors that furnish, after further redox reactions, as stable crystalline materials. performance tetraphenyl-substituted compound n-channel semiconductor was evaluated in organic...
The manuscript presents a novel approach for polymer-based Ag-DHBT-GDE fabrication, enabling highly efficient CO 2 electrolysis to with remarkable performance and selectivity.
We efficiently synthesized otherwise difficult to obtain 2,3- and 2,3,6,7-halogenated anthracenes with diverse east/west substituents. Key steps involve the (i) Vollhardt cyclization of bis(propargyl)benzenes bis(trimethylsilyl)acetylene, (ii) halo-desilylation introducing chlorine, bromine, or iodine substituents, (iii) dehydrogenation. Pd catalysis allows selective functionalization at anthracenes' positions. A tetrahydropentacene is derivatized via same strategy, employing tetrapropargylbenzene.
Naphthothiadiazoles are promising electron acceptors for applications in organic semiconductor-based (opto)electronic devices. Here, we studied the structural and electronic properties of naphthothiadiazole (NTD) derivatives adsorbed on Au(111) monolayer thin films using temperature-programmed desorption as well vibrational high-resolution energy loss spectroscopy. In addition, performed state-of-the-art quantum chemical calculations to further illuminate properties. multilayer coverage...
Electrochemical CO 2 reduction (eCO R) has emerged as a promising technology to support the shift away from fossil fuels in chemical industry. When coupled with renewable energies it allows for an overall carbon-negative process, while enabling carbon source production of commodity chemicals. Efficient eCO R requires gas diffusion electrodes (GDEs) that provide large wetted surface area inside porous system, also preserving gaseous pathways mass transport through their hydrophobicity. Under...
Measurements of uv-radiation emitted from a low current oxygen arc plasma show continuous emission, which can be attributed to radiative molecular recombination ground state atoms.
Polymer electrolyte membrane fuel cells (PEMFC) are lagging in commercialization due to the high cost of noble metal catalysts (e.g., Pt) and perfluorosulfonic acid-based (PFSA) membranes. Recycling reusing these components at end life (EoL) could increase viability decrease environmental impact PEMFCs. In this work, we demonstrate an environmentally friendly method for recycling PFSA membranes based on a hydrothermal treatment using only water as reactant, which is essential upscaling...
Energy-conversion technologies like the electrocatalytic nitrogen reduction reaction (N 2 RR), carbon monoxide (CORR) and in particular electrochemical dioxide (CO RR) can contribute decisively to overcome challenge of reducing greenhouse gas emissions. By CO electrochemically, carbon-cycle be closed industrially desired chemicals syngas + H ), formic acetic acid, or hydrocarbons, such as methanol ethylene, produced fossil-fuel free, depending on catalyst material applied. Ag-based catalysts...
On the road to a clean and sustainable energy production, reducing our greenhouse gas emissions is of utmost importance. It already well known that electrochemical reduction reaction carbon dioxide (CO 2 RR) valuable products can contribute this goal by power-to-X technology 1, . Hereby, amongst other factors, choice electrocatalyst material defines final product spectrum. For instance, noble metal Ag shows very high selectivities in conversion monoxide achieves faradaic efficiencies close...