A5057187288- CO2 Reduction Techniques and Catalysts
- Urban Agriculture and Sustainability
- Electrocatalysts for Energy Conversion
- Molecular spectroscopy and chirality
- Organic Food and Agriculture
- Synthesis and Properties of Aromatic Compounds
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Ionic liquids properties and applications
- Cardiovascular and exercise physiology
- Diamond and Carbon-based Materials Research
- Axial and Atropisomeric Chirality Synthesis
- Electrochemical Analysis and Applications
- Food Waste Reduction and Sustainability
- Children's Physical and Motor Development
- Land Use and Ecosystem Services
- Urban Green Space and Health
- Analytical Chemistry and Chromatography
- Neonatal Respiratory Health Research
- Sports Performance and Training
- Cyclopropane Reaction Mechanisms
- Environmental Education and Sustainability
- Obesity, Physical Activity, Diet
- Particle physics theoretical and experimental studies
- Synthetic Organic Chemistry Methods
Czech Academy of Sciences, Institute of Sociology
2022-2025
École Polytechnique Fédérale de Lausanne
2019-2024
Charles University
2004-2023
University of South Bohemia in České Budějovice
2011-2022
Czech Academy of Sciences, Institute of Organic Chemistry and Biochemistry
2009-2022
Jan Evangelista Purkyně University in Ústí nad Labem
2020-2021
Tomas Bata University in Zlín
2020
Hôpital de Sion
2020
Masaryk University
2018
Czech Technical University in Prague
2013-2016
Abstract Size, morphology, and surface sites of electrocatalysts have a major impact on their performance. Understanding how, when, why these parameters change under operating conditions is importance for designing stable, active, selective catalysts. Herein, we study the reconstruction Cu‐based nanocatalysts during startup phase electrochemical CO 2 reduction reaction by combining results from in situ transmission electron microscopy with operando X‐ray absorption spectroscopy. We reveal...
Synergistic effects at metal/metal oxide interfaces often give rise to highly active and selective catalytic motifs. So far, such interactions have been rarely explored enhance the selectivity in electrochemical CO2 reduction reaction (CO2RR). Herein, Cu/CeO2-x heterodimers (HDs) are synthesized presented as one of prime examples where promote CO2RR. A colloidal seeded-growth synthesis is developed connect two mismatched domains (Cu CeO2-x) through an interface. The HDs exhibit...
Abstract To date, copper is the only monometallic catalyst that can electrochemically reduce CO 2 into high value and energy‐dense products, such as hydrocarbons alcohols. In recent years, great efforts have been directed towards understanding how its nanoscale structure affects activity selectivity for electrochemical reduction reaction (CO RR). Furthermore, many attempts made to improve these two properties. Nevertheless, advance applied systems, stability of catalysts during electrolysis...
Among the perovskites used to catalyze oxygen evolution reaction (OER), Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) exhibits excellent activity which is thought be related dynamic reconstruction at flexible perovskite surface due accommodation of large amount vacancies. By studying local structure and chemistry BSCF surfaces, in detail, via a range transmission electron microscopy (TEM) methods, we show that surfaces as-synthesized particles are Co/Fe rich, remarkably, adopt spinel-like with reduced...
Correlating the catalyst activity, selectivity, and stability with its structure composition is of utmost importance in advancing knowledge heterogeneous electrocatalytic processes for chemical energy conversion. Well-defined colloidal nanocrystals tunable monodisperse size uniform shapes are ideal platforms to investigate effect these parameters on catalytic performance. In addition translating from single-crystal studies more realistic conditions, morphological compositional complexity...
Liquid metals (LMs) have been used in electrochemistry since the 19th century, but it is only recently that they emerged as electrocatalysts with unique properties, such inherent resistance to coke poisoning, which derives from dynamic nature of their surface. The use LM nanoparticles (NPs) highly desirable enhance any surface-related phenomena. However, NPs are expected rapidly coalesce, similarly liquid drops, makes implementation electrocatalysis hard envision. Herein, we demonstrate Ga...
Two-step redox switching in enantiopure helquat system [P-1](2+) ⇌ [P-1](•+) [P-1](0) is demonstrated. The viologen-type electroactive unit embedded directly the helical scaffold of 1 responsible for prominent chiroptical at 264 nm. This process associated with a marked sign-reversal Cotton effect ramping between Δε = +35 M(-1) cm(-1) and -100 [P-1](0). helically chiral features most intense switch response documented field helicenoids.
Resilience and food self-provisioning (FSP), terms that until recently were deployed primarily in the study of livelihoods Global South, are now attracting attention from alternative scholarship North. Drawing on a large-scale survey conducted Czech Republic, this article investigates FSP as social resilience-enhancing set practices. In addition to traditional reading passive, defensive crisis-deflecting form resilience, puts forward an conceptualisation resilience proactive, preventative,...
Helquat dyes combine a cationic hemicyanine with helicene-like motif to form new blueprint for chiral systems large and tunable nonlinear optical (NLO) properties. We report series of such species characterization, including determination static first hyperpolarizabilities β0 via hyper-Rayleigh scattering Stark spectroscopy. The measured values are similar or substantially larger than that the commercial chromophore E-4′-(dimethylamino)-N-methyl-4-stilbazolium. Density functional theory...
Understanding the catalyst compositional and structural features that control selectivity is of uttermost importance to target desired products in chemical reactions. In this joint experimental-computational work, we leverage tailored Cu/ZnO precatalysts as a material platform identify intrinsic methane-producing ethanol-producing CuZn catalysts electrochemical CO2 reduction reaction (CO2RR). Specifically, find Cu@ZnO nanocrystals, where central Cu domain decorated with ZnO domains, ZnO@Cu...
ABSTRACT Recent social scientific research has often dealt with public perceptions of climate change as an isolated topic. In contrast, we explored through qualitative interviews ( n = 202) across five European countries how members the conceptualized within a wider context energy and future, drawing on representation theory. Our analysis suggests that, rather than separating between environmental issues, participants interpreted both consumption in unsustainable resource use. Views were...
Within the scholarly debate, Urban Agriculture (UA) has been widely acknowledged to provide diverse environmental and socio-cultural ecosystem services (ESs) for cities. However, question of whether these potential benefits are also recognized as such by involved societal groups on ground not yet investigated. This paper aims at (1) assessing perceived ESs UA, comparing views different in city Bologna, Italy (namely: UA project leaders, stakeholders general public) (2) identify differences...
Abstract Size, morphology, and surface sites of electrocatalysts have a major impact on their performance. Understanding how, when, why these parameters change under operating conditions is importance for designing stable, active, selective catalysts. Herein, we study the reconstruction Cu‐based nanocatalysts during startup phase electrochemical CO 2 reduction reaction by combining results from in situ transmission electron microscopy with operando X‐ray absorption spectroscopy. We reveal...
Helically chiral styryl dyes with large ECD in the visible region are introduced.
Abstract This article presents the results of an international comparative study on food self‐provisioning, activity still widespread in countries Global North. We collected data a sociological survey done 2010 as part household energy use research project GILDED. selected region with urban and rural areas case each five EU countries, including Scotland, Netherlands, Germany, Czech Republic, Hungary. Our raises two main questions: (1) What is level self‐provisioning regions? (2) Who...
The concept of the city-region food system is gaining attention due to need improve availability, quality and environmental benefits, for example through sustainable agri-food strategies. COVID-19 pandemic has reinforced importance coherent inclusive governance, especially regarding resilience, vulnerability justice. Given that evidence from good practices relatively sparse, it important better understand role different types cities, regions household characteristics. paper's aim describe,...
Liquid-phase transmission electron microscopy (LPTEM) is an essential tool for studying the dynamics of materials interactions at nanoscale, in and/or with their operational environment. Microfabricated SiN x membrane cells further allow integration thin-film electrodes that opens technique to studies heterogeneous electrocatalysts under relevant electrochemical conditions. However, experiments remain challenging and characteristics dedicated beam liquid electrolyte demand careful...