A5000351868- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Ionic liquids properties and applications
- Advanced Thermoelectric Materials and Devices
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Advanced battery technologies research
- Transition Metal Oxide Nanomaterials
- Forensic Fingerprint Detection Methods
- Analytical Chemistry and Sensors
- Machine Learning in Materials Science
- Carbon dioxide utilization in catalysis
- Catalytic Processes in Materials Science
- Covalent Organic Framework Applications
- Advancements in Solid Oxide Fuel Cells
- Supercapacitor Materials and Fabrication
- Phase Equilibria and Thermodynamics
- Electrochemical Analysis and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Forensic and Genetic Research
- Digital and Cyber Forensics
- Electron and X-Ray Spectroscopy Techniques
- Microbial bioremediation and biosurfactants
- Cultural Heritage Materials Analysis
- Catalysts for Methane Reforming
Helmholtz-Zentrum Berlin für Materialien und Energie
2020-2024
Freie Universität Berlin
2020-2024
Goce Delcev University
2024
Saints Cyril and Methodius University of Skopje
2019-2020
Institute of Chemistry
2012-2018
Macedonian Academy of Sciences and Arts
2015
Membrane electrode assemblies enable CO2 electrolysis at industrially relevant rates, yet their operational stability is often limited by formation of solid precipitates in the cathode pores, triggered cation crossover from anolyte due to imperfect ion exclusion anion exchange membranes. Here we show that concentration affects degree movement through membranes, and this substantially influences behaviors copper catalysts catholyte-free electrolysers. Systematic variation (KOH or KHCO3) ionic...
Abstract The development of earth‐abundant catalysts for selective electrochemical CO 2 conversion is a central challenge. CuSn bimetallic can yield reduction toward either or formate. This study presents oxide‐derived tunable product and seeks to understand the synergetic effects between Cu Sn causing these selectivity trends. materials undergo significant transformations under conditions, their dynamic bulk surface structures are revealed by correlating observations from multiple...
Herein, we report a straightforward, scalable synthetic route towards poly(ionic liquid) (PIL) homopolymer nanovesicles (NVs) with tunable particle size of 50 to 120 nm and shell thickness 15 60 via one-step free radical polymerization induced self-assembly. By increasing monomer concentration for polymerization, their nanoscopic morphology can evolve from hollow NVs dense spheres, finally directional worms, in which multilamellar packing PIL chains occurred all samples. The transformation...
To sustainably exist within planetary boundaries, we must greatly curtail our extraction of fuels and materials from the Earth. This requires new technologies based on reuse repurposing material already available. Electrochemical conversion CO2 into valuable chemicals is a promising alternative to deriving them fossil fuels. But most metals used for electrocatalysis are either endangered or at serious risk limitation their future supply. Here, demonstrate combined strategy waste industrial...
To address the challenge of selectivity toward single products in Cu-catalyzed electrochemical CO2 reduction, one strategy is to incorporate a second metal with goal tuning catalytic activity via synergy effects. In particular, catalysts based on Cu modified post-transition metals (Sn or In) are known reduce selectively either CO HCOO- depending their composition. However, it remains unclear exactly which factors induce this switch reaction pathways and whether these two related bimetal...
Covellite-phase CuS and carrollite-phase CuCo2S4 nano- microstructures were synthesized from tetrachloridometallate-based ionic liquid precursors using a novel, facile, highly controllable hot-injection synthesis strategy. The parameters including reaction time temperature first optimized to produce with well-controlled unique morphology, providing the best electrocatalytic activity toward oxygen evolution (OER). In an extension this approach, was further improved by incorporating Co into...
Abstract Mass activity and long-term stability are two major issues in current fuel cell catalyst designs. While supported catalysts normally suffer from poor but show high mass activity, unsupported tend to perform better the first point while showing deficits latter one. In this study, a facile synthesis route towards self-supported metallic electrocatalyst nanoarchitectures with both aspects mind is outlined. This procedure consists of palladium seeding step ion track-etched polymer...
Abstract The conversion of CO 2 into formate (HCOO − ), a techno‐economically feasible product, can be achieved using earth‐abundant Cu x S electrocatalysts, but questions remain regarding how catalyst structure, composition, and reaction environment influence product selectivity. A novel synthesis method based on electrodeposition foam its subsequent sulfidation via immersion in sulfur saturated toluene solution resulted foams. Catalytic activity studies found that HCOO selectivity is...
This study addresses the potential of combining multiple electroless plating reactions for homogeneous decoration three-dimensional carbon fibers (CFs) with shape-controlled AgNi and AgCu bimetallic nanostructures. Morphology, crystal structure, composition obtained nanostructures were systemically examined by various spectroscopic microscopic techniques including scanning electron microscopy, transmission X-ray diffraction, photoelectron spectroscopy. The electrocatalytic performance...
Abstract Gas-diffusion anion exchange membrane electrode assemblies enable CO 2 reduction at industrially relevant rates, yet their long-term operational stability is often limited by the formation of solid precipitates in cathode pores. This a consequence unintended cation crossover from anolyte, and detailed understanding factors enabling this lacking. Here we show that anolyte concentration governs flux migration through membrane, substantially influences behaviors copper catalysts...
Abstract A new chemical method for visualization of latent fingermarks on unfired cartridge cases is reported in this research. The based two‐step immersion the aqueous solutions sulfuric acid and acidified sodium thiosulfate at room temperature. reactions that are occurring case's surface leading to deposition material furrows between papillary line ridges thus visualizing fingermark. qualitative composition as‐deposited was studied using X‐ray powder diffraction analysis revealing it...
To address the challenge of selectivity towards single product in Cu-catalyzed electrochemical CO2 reduction, one strategy is to incorporate a second metal with goal tuning catalytic activity via synergy effects. In particular, catalysts based on Cu modified post-transition metals (Sn or In) are known reduce selectively either CO HCOO- depending their composition. However, it remains unclear exactly which factors induce this switch reaction pathways, and whether these two related bimetal...
Membrane electrode assemblies in gas diffusion cells enable CO 2 reduction at industrially relevant rates, yet their long-term operational stability is often limited by the formation of solid precipitates (e.g. K 3 ) cathode pores. This a consequence combination 1) local alkalization due to electrochemical reaction, 2) generation (bi)carbonate chemical reaction with alkaline electrolyte, and 3) presence alkali metal cations. In catholyte-free, zero-gap using anion exchange membranes,...
Electrochemically converting carbon dioxide into useful products is a promising approach to combat climate change by reducing our reliance on fossil fuels and promoting sustainable cycle. The operation of membrane electrode assemblies within gas diffusion cells facilitates the efficient reduction CO2 at rates relevant industrial applications. However, their long-term stability often limited formation solid precipitates in cathode pores. This consequence combination 1) local alkalization due...
The present study describes development of a non-enzymatic amperometric sensor for detection H2O2 based on MnCO3 thin film electrodes.The was deposited electroconductive FTO coated glass substrates using simple chemical bath deposition method.The phase composition the confirmed by X-ray diffraction analysis.The electrochemical properties and sensitivity towards were examined cyclic voltammetry chronoamperometry in 0.1 M phosphate buffer solution with pH = 7.5.It revealed that sensing...
In the field of electrochemical reduction CO 2 (CO ER) Cu and oxide derived OD-Cu electrocatalysts have been widely studied due to their unique capability produce high added value products, such as CO, hydrocarbons alcohols, albeit with relatively low selectivity. 1 Cu-M bimetallic catalysts are a promising approach break scaling relations among key intermediates modulate ER past 5 years, several studies on activity Cu-Sn demonstrated remarkably selectivities towards 2,3 or formate. 4,5...
In the field of electrochemical CO 2 conversion, development earth-abundant catalysts which are selective for a single product is central challenge. Cu-Sn bimetallic have been reported to yield reduction towards either carbon monoxide or formate. To advance understanding possible synergetic effects between Cu and Sn direct selectivity, thorough investigation catalyst structure composition in its active state desired. We present an X-ray spectroscopy oxide-derived prepared by...