- Jagiellonian University, Faculty of Chemistry, Department MemberPolish Academy of Sciences, Institute of Catalysis and Surface Chemistry, Department Memberadd
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Acta Crystallographica Section C. Crystal Structure Communications. 0108-2701. organic compounds. Volume 51 Part 1 Pages 98-103 January 1995 Two Centrosymmetric Conjugated Nitrones of the Diazabutadiene System. PK Olszewski and K.... more
Acta Crystallographica Section C. Crystal Structure Communications. 0108-2701. organic compounds. Volume 51 Part 1 Pages 98-103 January 1995 Two Centrosymmetric Conjugated Nitrones of the Diazabutadiene System. PK Olszewski and K. Stadnicka Acta Cryst. (1995). ...
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Morphology, surface composition, dispersion of the metals were determined for a series of the M/(3ZnO·ZrO2) catalysts (M = Cu, Ag, Au) with the use of the XPS, XRD and TEM techniques. Catalytic activity in the reaction of the synthesis of... more
Morphology, surface composition, dispersion of the metals were determined for a series of the M/(3ZnO·ZrO2) catalysts (M = Cu, Ag, Au) with the use of the XPS, XRD and TEM techniques. Catalytic activity in the reaction of the synthesis of methanol from CO2 was also determined. The catalysts contain crystallites of ZnO and amorphous ZrO2, and they show a considerable segregation of the components. The surface is depleted of the metal, metallic Cu is present mainly in the surrounding of ZnO. In the catalysts containing gold and silver, Au and Ag are distributed more uniformly. The dispersion of the metals in the catalysts depends on the nature of the metal and decreases in the series Au ≅ Cu > Ag, and for a given metal it decreases with the increase in the metal content. The catalysts containing copper exhibit by far higher catalytic activity when compared to the catalysts containing Ag and Au, due to a synergy between Cu and ZnO or ZrO2.
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Nanoclusters of Pt, Pt–Rh, Pt–SnO2 and Pt–Rh–SnO2 were successfully synthesized by polyol method and deposited on high-area carbon. HRTEM and XRD analysis revealed two phases in the ternary Pt–Rh–SnO2/C catalyst: solid solution of Rh in... more
Nanoclusters of Pt, Pt–Rh, Pt–SnO2 and Pt–Rh–SnO2 were successfully synthesized by polyol method and deposited on high-area carbon. HRTEM and XRD analysis revealed two phases in the ternary Pt–Rh–SnO2/C catalyst: solid solution of Rh in Pt and SnO2. The activity of Pt–Rh–SnO2/C for ethanol oxidation was found to be much higher than Pt/C and Pt–Rh/C and also superior to Pt–SnO2/C.
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... KSENIJA DJ. POPOVIĆ 1*#, JELENA D. LOVIĆ 1# , AMALIJA V. TRIPKOVIĆ 1# and PIOTR K. OLSZEWSKI 2 ... Chem. 60 (1975) 275 12. A. Kabbibi, R. Faure, R. Durand, B. Beden, F.Hahn, JM Leger, C. Lamy, J. Electro-anal. Chem. 444 (1998) 41 13.... more
... KSENIJA DJ. POPOVIĆ 1*#, JELENA D. LOVIĆ 1# , AMALIJA V. TRIPKOVIĆ 1# and PIOTR K. OLSZEWSKI 2 ... Chem. 60 (1975) 275 12. A. Kabbibi, R. Faure, R. Durand, B. Beden, F.Hahn, JM Leger, C. Lamy, J. Electro-anal. Chem. 444 (1998) 41 13. ...
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Solvatochromic effect of 4-(2,4,6-triphenylpyridinium-1-yl)-phenolate hydrate, 1, was determined. CT absorption band, which gave the shift from 23,880 (in water solution) to 14,440cm−1 (in anisole solution) allowed the molecular second... more
Solvatochromic effect of 4-(2,4,6-triphenylpyridinium-1-yl)-phenolate hydrate, 1, was determined. CT absorption band, which gave the shift from 23,880 (in water solution) to 14,440cm−1 (in anisole solution) allowed the molecular second order polarizability βCT to be estimated as 59.5×10−30cm5esu−1. The crystal structure of 1 was determined: C29H21NO·5.78H2O; orthorhombic, C2221, a=15.005(9), b=24.356(4), c=7.5097(9)Å; V=2744.5(17)Å3, Z=4, DX=1.224gcm−1; λ=0.71073Å (Mo Kα); μ=0.087mm−1; final R1=0.0551 for
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A nickel–copper–iron–phosphorus Ni63Cu9Fe8P20 alloy was prepared. The precursors were induction melted in tubes under vacuum (10−2bar). The microstructure of the alloy was investigated by use of light microscopy, scanning electron... more
A nickel–copper–iron–phosphorus Ni63Cu9Fe8P20 alloy was prepared. The precursors were induction melted in tubes under vacuum (10−2bar). The microstructure of the alloy was investigated by use of light microscopy, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). Analysis of the morphology was carried out and the volume fraction of microstructural constituents in as-cast state was assessed. The melt spinning was