A5056309530- Gas Sensing Nanomaterials and Sensors
- CO2 Reduction Techniques and Catalysts
- Analytical Chemistry and Sensors
- ZnO doping and properties
- Molecular Junctions and Nanostructures
- Catalytic Processes in Materials Science
- Transition Metal Oxide Nanomaterials
- Electrocatalysts for Energy Conversion
- Ionic liquids properties and applications
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Advanced battery technologies research
- Chalcogenide Semiconductor Thin Films
- Carbon Dioxide Capture Technologies
- Solar-Powered Water Purification Methods
- Molten salt chemistry and electrochemical processes
- Catalysis and Oxidation Reactions
- Chemical Looping and Thermochemical Processes
- Space exploration and regulation
- Hybrid Renewable Energy Systems
- Nanowire Synthesis and Applications
- Space Science and Extraterrestrial Life
- Photochemistry and Electron Transfer Studies
- Advanced Data Processing Techniques
- Advanced Chemical Sensor Technologies
Institute of Photonic Sciences
2022-2024
Institut de Recerca en Energia de Catalunya
2021-2023
South Ukrainian National Pedagogical University named after K. D. Ushynsky
2015-2020
Center for Innovation
2019
Tampere University
2013
The oxygen evolution reaction is the bottleneck to energy-efficient water-based electrolysis for production of hydrogen and other solar fuels. In proton exchange membrane water (PEMWE), precious metals have generally been necessary stable catalysis this reaction. work, we report that delamination cobalt tungstate enables high activity durability through stabilization oxide water-hydroxide networks lattice defects in acid. resulting catalysts achieve lower overpotentials, a current density...
Electrochemical carbon dioxide (CO2) conversion to hydrocarbon fuels, such as methane (CH4), offers a promising solution for the long-term and large-scale storage of renewable electricity. To enable this technology, CO2-to-CH4 must achieve high selectivity energy efficiency at currents. Here, we report an electrochemical system that features proton-bicarbonate-CO2 mass transport management coupled with in-situ copper (Cu) activation strategy CH4 We find open matrix Cu electrodes sustain...
Utilization of the renewable energy sources is one main challenges in state-of-the-art technologies for CO2 recycling. Here we have taken advantage solar light harvesting thermocatalytic approach to carbon dioxide methanation. The large-surface-area Ni/CeO2 catalyst produced by a scalable low-cost method was characterized and tested dark under irradiation conditions. Light-assisted conversion experiments as well in-situ DRIFT spectrometry, performed at different illumination intensities,...
The understanding of catalyst active sites is a fundamental challenge for the future rational design optimized and bespoke catalysts. For instance, partial reduction Ce4+ surface to Ce3+ formation oxygen vacancies are critical CO2 hydrogenation, CO oxidation, water gas shift reaction. Furthermore, metal nanoparticles, reducible support, support interactions prone evolve under reaction conditions; therefore structure must be characterized operando conditions identify states deduce...
The spin Hamiltonian parameters of intrinsic defects in tin dioxide (SnO2) doped with fluorine or hydrogen are examined through the first-principles electronic structure calculations based on density functional theory (DFT). electron paramagnetic resonance signals g-tensor value range 1.89–1.94 were found for vacancy (VSn) and its complex oxygen (VSn-VO) associated a donor like interstitial fluorine, substituting oxygen. calculated consistent experimental observations, which indicate that Sn...
Phthalocyanines (Pc) are well-known light-harvesting compounds. However, despite the tremendous efforts on phthalocyanine synthesis, achieved energy conversion efficiencies for Pc-based dye-sensitized solar cells moderate. To cast light factors reducing efficiency, we have undertaken a time-resolved spectroscopy study of primary photoinduced reactions at semiconductor-Pc interface. ZnO nanorods were chosen as model semiconductor substrate with enhanced specific surface area. The use...
We focused on the development of multiple nanowires sensors which possess advantages single nanowire sensors, but are suitable for industrial application due to their cost-efficiency and scalability implemented technology. The proposed approach consists in realizing cross-linked bridging two electrodes by growing horizontal ZnO NW via hydrothermal growth. nanowires' surface was functionalized deposition ultrathin layer inorganic materials using: Atomic Layer Deposition (ALD) cycles Al <inf...
A theoretical study of a phthalocyanine molecule anchored on CdSe quantum dots demonstrated strong orientational effects and the important role linker in photoinduced charge transfer between components.
Abstract Electrochemical carbon dioxide (CO 2 ) reduction from aqueous solutions offers a promising strategy to overcome flooding and salt precipitation in gas diffusion electrodes used gas‐phase CO electrolysis. However, liquid‐phase electrolysis often exhibits low rates because of limited availability. Here, macroporous Ag mesh is employed activated achieve selective conversion with high an bicarbonate solution. It found that activation surface using oxidation/reduction cycles produces...
СТРАХОВАНИЕ КОСМИЧЕСКИХ ПРОЕКТОВ НА ОСНОВЕ ВЕРОЯТНОСТНОГО АНАЛИЗА РИСКОВВ. В
Macrocyclic dyes such as phthalocyanine and porphyrin molecules are modeled on (1010) wurzite surfaces using the DFT molecular dynamics approaches. It is found that single dye anchored wurtzite surface stabilizes in an inclined geometry with its core facing at a tilting angle of ca 60∘. The relative to crystal has dual effect charge transfer from chromophore semiconductor. Increasing leads stronger coupling between lowest level semiconductor conduction band dye’s LUMO, thus raising tunneling...
High-Efficiency Methane Production via Electrochemical CO2 Reduction in Aqueous Bicarbonate SystemsViktoria Golovanova a, Cornelius Obasanjo b, Guorui Gao Jackson Crane F. Pelayo García de Arquer Cao-Thang Dinh ba ICFO - Institut Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860, Castelldefels, Spainb Department Chemical Engineering, Queen's University, Kingston, ON K7L 3N6, CanadaMaterials for Sustainable Development Conference (MATSUS)Proceedings MATSUS Spring...
Interaction of SnO2- and In2O3-based sensors with the reducing CO CH4 gases in a humid atmosphere has been studied. The atmospheric moisture is shown to have significant influence on sensor conductivity, as well correlation between sensitivity catalytic activity. results obtained are analogous for various oxides gases. mechanism interaction gas oxide surface environment proposed. Using calculations carried out framework density functional theory, two different types hydroxyl radicals...
We investigated the effect of light activation on gas sensors based aligned nanowires (NWs). Due to almost monocrystalline perfection, NWs exhibit excellent chemical and thermal stability that makes them superior polycrystalline thin-film sensors. Nanowires were in two different ways: using Langmuir-Blodgett technique a chip with electrodes being microns apart, hydrothermal growth procedure obtain inter-crossed nanowires. Our objective was fabricate multiple nanowire could mimic advantages...