A5012609880- Conducting polymers and applications
- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Electron Spin Resonance Studies
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Advanced battery technologies research
- Polyoxometalates: Synthesis and Applications
- Polymer Science and PVC
- Magnetism in coordination complexes
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal complexes synthesis and properties
- Vanadium and Halogenation Chemistry
- Food composition and properties
- Lanthanide and Transition Metal Complexes
- Building materials and conservation
- Spectroscopy and Chemometric Analyses
- Catalysis and Oxidation Reactions
- Organic Light-Emitting Diodes Research
- Photochemistry and Electron Transfer Studies
- Metal-Catalyzed Oxygenation Mechanisms
- Adsorption and biosorption for pollutant removal
- TiO2 Photocatalysis and Solar Cells
- Graphene research and applications
Jagiellonian University
2016-2025
Faculty (United Kingdom)
2015
Krakow Cardiovascular Research Institute
2015
University of Detroit Mercy
1998-2012
Uniwersytet Komisji Edukacji Narodowej w Krakowie
2012
Linköping University
2008
In this paper we present a study on stable radicals and short-lived species generated in anion-exchange membrane (AEM) fuel cells (AEMFCs) during operation. The situ measurements are performed with micro-AEMFC inserted into resonator of an electron paramagnetic resonance (EPR) spectrometer, which enables separate monitoring formed the anode cathode sides. creation is monitored by EPR spin trapping technique. For first time, clearly show formation presence AEMs after long-term AEMFC main...
Single Cu(<sc>ii</sc>) and Fe(<sc>iii</sc>) surface catalytic sites dramatically enhance the activity of rutile TiO<sub>2</sub>in photocatalytic degradation 4-chlorophenol.
The alkaline operating environment of anion-exchange membrane (AEM) fuel cells (AEMFCs) makes it possible to employ a wide variety catalysts, including platinum group metals (PGMs) as well PGM-free materials. However, little is understood about radical formation during AEMFC operation with different catalysts and their implications. In this investigation, we utilized spin-trapping electron-paramagnetic resonance measurements measure identify the radicals produced on selected PGM...
Abstract Photocatalytic carboxylation of acetylacetone with carbon dioxide has been performed by using ZnS‐based photocatalysts. The formation two isomeric carboxylic acids, as proven IR and 13 C NMR spectroscopy, was observed. reaction yield enhanced after deposition ruthenium nanoparticles on ZnS. encompasses ruthenium‐mediated one‐electron reduction CO 2 to .− electrons from the conduction band ZnS one‐hole oxidation relevant radical. Coupling photogenerated radicals leads acids....
A diradical/biradical character of organic derivatives is one the key aspects contemporary research focusing on fundamental studies followed by potential applicability relying unique optical, electronic, or magnetic properties assigned to unpaired electrons. precise involvement two p-phenylenes into a cyclophane-like conjugated, diatropic system creates flexible molecule with different characters both subunits (benzene and quinone) imprinting structure Kekulé delocalized system. dynamic...
To clean or not to clean? The solution this dilemma is related understanding the plasticiser migration which has a few practical implications for state of museum artefacts made plasticised poly(vinyl chloride) - PVC and objects stored in their vicinity. consequences process encompass aesthetic changes due presence exudates dust deposition, an increase air pollution development mechanical stresses. Therefore, paper discusses provide evidence support recommendations guidelines conservators,...
<title>Abstract</title> Piezoelectric nanocomposites have become increasingly popular in the field of energy harvesting systems. An investigation into PVDF electrospun nanocomposite membrane doped with varying weight percentages Ce <sup>3+</sup> is presented. A blue shift bandgap ceria NPs was found by optical characterisation using absorbance analysis, which also enhanced UV absorption polymer. At some additive doses, luminosity analysis demonstrated an incremental fluorescence impact. But...
Using acid–base-type doping of polyaniline with H3PMo12O40, two series catalyst samples were prepared. In Sl the and polymerization carried out simultaneously, leading to a uniform distribution dopant over whole volume polymer. SII was achieved by protonation already formed polyemeraldine base H3PMo12O40. Since this process must involve diffusion in solid matrix, surface becomes enriched heteropolyanions (Keggin units) due their limited diffusivity. The examination physicochemical properties...
The photocatalytic activity of materials synthesized by titanium dioxide impregnation with chromates(VI) was studied in the processes 4-chlorophenol oxidation and photocurrent generation. show measurable when excited visible light. Electron paramagnetic resonance (EPR) studies revealed presence chromium(V) species even without irradiation. Detection photogenerated reactive oxygen species, together elucidation electrochemical properties materials, enabled assumption a very unique mechanism...
Janusz Szklarzewicz*a, Anna Jurowskaa, Maciej Hodorowicza, Ryszard Grybośa, Krzysztof Kruczałaa, Monika Głuch-Lutwinb & Grzegorz Kazekba aFaculty of Chemistry, Jagiellonian University, Kraków, Poland; b bFaculty Pharmacy, University Medical College, Poland
Vibrational spectroscopic techniques, such as Raman spectroscopy, a non-destructive method combined with machine learning (ML), were successfully tested quick of plasticizer identification in poly(vinyl chloride) - PVC objects heritage collection. ML algorithms Convolutional Neural Network (CNN), Random Forest (RF), Support Vector Machines (SVM), and Linear Discriminant Analysis (LDA) applied to the classification most common plasticizers used case PVC. The CNN model was able classify five...
The unique physicochemical properties and biocompatibility of zinc oxide nanocrystals (ZnO NCs) are strongly dependent on the nanocrystal/ligand interface, which is largely determined by synthetic procedures. Stable ZnO NCs coated with a densely packed shell 2-(2-methoxyethoxy)acetate ligands, act as miniPEG prototypes, average core size hydrodynamic diameter 4-5 about 12 nm, respectively, were prepared an organometallic self-supporting approach, fully characterized, used model system for...
Carbon carriers play a triple role in the ORR, determining nanoparticle dispersion, faceting, and reaction mechanism.
The cyano-bridged [CuII(tetrenH2)]2[WIV(CN)8]2·5H2O (tetren = tetraethylenepentaamine) (1), [CuII(tetrenH2)][CuII(tetrenH)][WV(CN)8][WIV(CN)8]·2.5H2O (2), [CuII(dien)]2[WIV(CN)8]·4H2O (dien diethylenetriamine) (3) and its isomorphous molybdenum(IV) analogue (4) have been prepared structurally characterised. 1 2 are built from the W2Cu2(μ-CN)4 squares extended into 1-D structure by cyano-bridges. 2-D 3 4 form a square grid pattern with tungsten atoms in corners –CN–Cu(dien)–NC– linkages on...
Two Fe-containing BEA zeolites were prepared by ion-exchange (IE; Fe-BEA) and postsynthesis (PS; Fe-BEA/DeAl) procedures. Similar Fe content (0.8 to 0.9 wt %) was evidenced for studied samples. Fe-BEA, ion exchange, contained essentially iron cations at the exchange sites of zeolite. These are either isolated or bridged through an oxygen atom (Fe-oxo cations). In Fe-BEA/DeAl, a high portion introduced in T-positions zeolite lattice. The other part positions deposited as oxide clusters on...
One of the practical efforts in development oxygen reduction reaction (ORR) catalysts applicable to fuel cells and metal-air batteries is focused on reducing cost production. Herein, we have examined ORR performance cheap, non-noble metal based comprised nanosized mixed Fe-Co spinels deposited N,S-doped mesoporous carbon support (N,S-MPC). The effect chemical phase composition active selectivity process alkaline media was elucidated by changing iron content. synthesized materials were...
Mn–Co spinel/carbon electrocatalyst performance exhibits a volcano-type shape which results from trade-off between electrical conductivity and the amount of oxygen groups.