A5027188798- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Catalytic Processes in Materials Science
- Fuel Cells and Related Materials
- Catalysis and Oxidation Reactions
- Conducting polymers and applications
- Polyoxometalates: Synthesis and Applications
- Advanced battery technologies research
- Molecular Junctions and Nanostructures
- CO2 Reduction Techniques and Catalysts
- Machine Learning in Materials Science
- Advanced Materials Characterization Techniques
- nanoparticles nucleation surface interactions
- Electron and X-Ray Spectroscopy Techniques
- Advanced Photocatalysis Techniques
- Transition Metal Oxide Nanomaterials
- Advanced Chemical Physics Studies
- Chalcogenide Semiconductor Thin Films
- Metal-Organic Frameworks: Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Advancements in Solid Oxide Fuel Cells
- Metal Extraction and Bioleaching
- Advanced Nanomaterials in Catalysis
University of Warsaw
2013-2024
Institute of Catalysis and Petrochemistry
2021
Faculty (United Kingdom)
2021
University of Illinois Urbana-Champaign
2005-2008
University of North Texas
2006-2008
Urbana University
2008
Université de Poitiers
2006-2007
Technical University of Darmstadt
2007
University of Belgrade
2006
University of Illinois System
2006
We report a combined X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), and chronoamperometry (CA) study of formic acid electrooxidation on unsupported palladium nanoparticle catalysts in the particle size range from 9 to 40 nm. The CV CA measurements show that most active catalyst is made smallest (9 11 nm) Pd nanoparticles. Besides high reactivity, XPS data such nanoparticles display highest core-level binding energy (BE) shift valence band (VB) center downshift with respect...
Platinum nanoparticles have been selectively deposited on composites of titanium oxide-carbon and tungsten oxide-carbon. Selectivity the deposition made it possible to investigate changes in electronic properties both platinum oxide support, induced by so-called strong metal–support interactions (SMSI). X-ray photoelectron spectroscopy (XPS) was used, binding energy Pt 4f, Ti 2p, W 4f core-levels peak asymmetry were determined. These parameters allowed us state local electron density, when...
Theoretical DFT calculations suggest that chemisorption energy, activation barrier, and energy of dissociation small molecules on metal surface can be correlated to the d-band center gravity metal. This holds true for many systems reactions, but there are also reports where significant discrepancies were found. Here we present critical assessment applicability theory nonuniform catalytic systems, such as core–shell nanoparticles. For Pt-core–Pd-shell nanoparticles found a enhancement...
The ability of Keggin-type phosphododecamolybdates (PMo12O403-) to undergo chemisorption and form anionic monolayers on platinum surfaces is explored here produce stable colloidal solutions polyoxometalate-protected nanoparticles (size, 5−10 nm, as determined by transmission electron microscopy scanning tunneling microscopy). By dip-coating in the above solution, particles can readily be assembled carbon electrode substrates. layer-by-layer method, which involves alternate exposures...
We report the results of an investigation interaction between Se and Ru in Ru−Se electrocatalysts showing high activity methanol tolerance oxygen reduction reaction (ORR). The both 77Se EC-NMR as well XPS measurements indicate that Se, a semiconductor elemental form, becomes metallic when interacting with catalysts made by direct deposition onto from Ru3(CO)12. spin−lattice relaxation rates are proportional to T, Korringa behavior characteristic metals, observation supported binding energy...
This study seeks to explore the effects of electronic structure Pt/Ru alloy nanoparticles on reactivity small organic molecules relevance fuel cell applications through combined use synchrotron radiation photoelectron spectroscopy and electrochemistry. Platinum core-level binding energies were found increase linearly with addition ruthenium. effect is a product lattice strain charge transfer, explained in terms d-band center theory proposed by Nørskov co-workers (Hammer, B.; Nørskov, J. K....
This study focuses on clarifying the strong interaction existing between extended graphitic domains of ordered carbonaceous materials such as multiwalled carbon nanotubes and platinum nanoparticles. results from heterogeneous nucleation nanoparticles onto support. The metal clusters are chemically synthesized by using carbonyl route. Two different supports used namely, homemade nanotubes, MWCNT-m, classical Vulcan XC-72. Physicochemical properties these described Raman spectroscopy, X-ray...