Search Results - "Khalakhan, Ivan"

Optimization of ionomer-free ultra-low loading Pt catalyst for anode/cathode of PEMFC via magnetron sputtering by Ostroverkh, Anna, Johánek, Viktor, Dubau, Martin, Kúš, Peter, Khalakhan, Ivan, Šmíd, Břetislav, Fiala, Roman, Václavů, Michal, Ostroverkh, Yevhenii, Matolín, Vladimír

“…In this study, thin-film Pt catalysts with ultra-low metal loadings (ranging from 1 to 200 μg cm−2) were prepared by magnetron sputtering onto various…”
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In situ probing of magnetron sputtered Pt-Ni alloy fuel cell catalysts during accelerated durability test using EC-AFM by Khalakhan, Ivan, Vorokhta, Mykhailo, Kúš, Peter, Dopita, Milan, Václavů, Michal, Fiala, Roman, Tsud, Nataliya, Skála, Tomáš, Matolín, Vladimír

“…[Display omitted] As-deposited Pt-Ni and annealed Pt-Ni alloy catalyst films prepared by magnetron co-sputtering were investigated in order to quantify their…”
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New Insights towards High-Temperature Ethanol-Sensing Mechanism of ZnO-Based Chemiresistors by Piliai, Lesia, Tomeček, David, Hruška, Martin, Khalakhan, Ivan, Nováková, Jaroslava, Fitl, Přemysl, Yatskiv, Roman, Grym, Jan, Vorokhta, Mykhailo, Matolínová, Iva, Vrňata, Martin

“…In this work, we investigate ethanol (EtOH)-sensing mechanisms of a ZnO nanorod (NRs)-based chemiresistor using a near-ambient-pressure X-ray photoelectron…”
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Graphene composites with dental and biomedical applicability by Malik, Sharali, Ruddock, Felicite M, Dowling, Adam H, Byrne, Kevin, Schmitt, Wolfgang, Khalakhan, Ivan, Nemoto, Yoshihiro, Guo, Hongxuan, Shrestha, Lok Kumar, Ariga, Katsuhiko, Hill, Jonathan P

“…Pure graphene in the form of few-layer graphene (FLG) - 1 to 6 layers - is biocompatible and non-cytotoxic. This makes FLG an ideal material to incorporate…”
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Structural transformations and adsorption properties of PtNi nanoalloy thin film electrocatalysts prepared by magnetron co-sputtering by Brummel, Olaf, Waidhas, Fabian, Khalakhan, Ivan, Vorokhta, Mykhailo, Dubau, Martin, Kovács, Gábor, Aleksandrov, Hristiyan A., Neyman, Konstantin M., Matolín, Vladimir, Libuda, Jörg

“…[Display omitted] PtNi thin film catalysts provide higher activity and enhanced Pt efficiency in the oxygen reduction reaction (ORR) in comparison to pure Pt…”
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Characterization of thin CeO2 films electrochemically deposited on HOPG by Faisal, Firas, Toghan, Arafat, Khalakhan, Ivan, Vorokhta, Mykhailo, Matolin, Vladimír, Libuda, Jörg

“…•Preparation of proton exchange membrane fuel cells catalyst using electrochemical thin film deposition.•Electrodeposition thin films of CeO2 on HOPG…”
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Successive Vapor-Phase Guerbet Condensation of Ethanol and 1‑Butanol to 2‑Ethyl-1-hexanol over Hydroxyapatite Catalysts in a Flow Reactor by Zikrata, Oksana V, Larina, Olga V, Valihura, Karina V, Kyriienko, Pavlo I, Balakin, Dmytro Yu, Khalakhan, Ivan, Veltruská, Katerina, Krajnc, Andraž, Mali, Gregor, Soloviev, Sergiy O, Orlyk, Svitlana M

“…Calcium-containing hydroxyapatites including those modified with magnesium and strontium were prepared and tested as promising catalysts for the sustainable…”
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Fast synthesis of MgO–Al2O3 systems: effect on physicochemical characteristics and catalytic properties in Guerbet condensation of ethanol by Valihura, Karina V., Larina, Olga V., Kyriienko, Pavlo I., Yaremov, Pavlo S., Khalakhan, Ivan, Trachevskiy, Volodymyr V., Soloviev, Sergiy O., Orlyk, Svitlana M.

“…A series of hydrotalcite-derived Mg–Al oxide systems with Mg/Al atomic ratios of 2 and 3 were synthesized. The hydrotalcite of Mg–Al-2 and Mg–Al-3 samples was…”
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Catalytic performance of ternary Mg-Al-Ce oxides for ethanol conversion into 1-butanol in a flow reactor by Larina, Olga V., Valihura, Karina V., Kyriienko, Pavlo I., Vlasenko, Nina V., Balakin, Dmytro Yu, Khalakhan, Ivan, Veltruská, Katerina, Čendak, Tomaž, Soloviev, Sergiy O., Orlyk, Svitlana M.

“…An investigation of hydrotalcite-derived ternary Mg-Al-Ce oxides as catalysts for vapour phase condensation of ethanol to 1-butanol in a flow reactor under…”
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Nanostructured Pt–CeO2 thin film catalyst grown on graphite foil by magnetron sputtering by Vorokhta, Mykhailo, Khalakhan, Ivan, Matolínová, Iwa, Kobata, Masaaki, Yoshikawa, Hideki, Kobayashi, Keisuke, Matolín, Vladimir

“…► The Pt–CeO2 catalyst sputtered on graphite shows highly porous surface morphology. ► The Ce3+/Ce4+ and Pt2+/Pt4+ ratios are affected by plasma–substrate…”
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In situ electrochemical grazing incidence small angle X-ray scattering: From the design of an electrochemical cell to an exemplary study of fuel cell catalyst degradation by Bogar, Marco, Khalakhan, Ivan, Gambitta, Alessandro, Yakovlev, Yurii, Amenitsch, Heinz

“…Nowadays, electrochemistry has a considerable technological impact, involving fuel cells, super capacitors and batteries. These devices are based on complex…”
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On the interpretation of X-ray photoelectron spectra of Pt-Cu bimetallic alloys by Khalakhan, Ivan, Vorokhta, Mykhailo, Xie, Xianxian, Piliai, Lesia, Matolínová, Iva

“…•Overlapping the XPS Pt 4f and Cu 3p spectra of Pt-Cu alloys complicates its analysis.•XPS Cu 3p spectra were examined for all oxidation states of copper (Cu0,…”
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Surface compositional dynamics in a PtNi bimetallic alloy under simulated operational conditions: Electrochemical and NAP-XPS Study by Xie, Xianxian, Sandhya, Athira Lekshmi Mohandas, Piliai, Lesia, Vorokhta, Mykhailo, Matolínová, Iva, Khalakhan, Ivan

“…Platinum-based bimetallic alloys possess unique activities exceeding those of pure platinum. Nevertheless, as complex multi-component systems, they suffer from…”
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Oxygen Reduction Reaction in Alkaline Media Causes Iron Leaching from Fe–N–C Electrocatalysts by Ku, Yu-Ping, Ehelebe, Konrad, Hutzler, Andreas, Bierling, Markus, Böhm, Thomas, Zitolo, Andrea, Vorokhta, Mykhailo, Bibent, Nicolas, Speck, Florian D., Seeberger, Dominik, Khalakhan, Ivan, Mayrhofer, Karl J. J., Thiele, Simon, Jaouen, Frédéric, Cherevko, Serhiy

“…The electrochemical activity of modern Fe–N–C electrocatalysts in alkaline media is on par with that of platinum. For successful application in fuel cells…”
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High‐Strength Self‐Healable Supercapacitor Based on Supramolecular Polymer Hydrogel with Upper Critical Solubility Temperature by Elashnikov, Roman, Khrystonko, Olena, Jilková, Tereza, Rimpelová, Silvie, Prchal, Jan, Khalakhan, Ivan, Kolská, Zdeňka, Švorčík, Václav, Lyutakov, Oleksiy

“…Here, poly(N‐acryloylglycinamide‐co‐vinyltriazole) p(NAGA‐co‐VTZ) supramolecular polymer hydrogel doped with carbonized and activated polypyrrole nanotubes as…”
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Low dielectric constant silica-containing cross-linked organic-inorganic materials based on fluorinated poly(arylene ether)s by Tkachenko, Ihor, Kononevich, Yuriy, Kobzar, Yaroslav, Purikova, Olha, Yakovlev, Yurii, Khalakhan, Ivan, Muzafarov, Aziz, Shevchenko, Valery

“…In this work, for the first time, we describe the design and synthesis of novel fluorinated poly(arylene ether)/silica cross-linked materials (FPAE/SiO1.5)…”
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Electrochemical dissolution of PtRu/C: Effect of potential, fuels, and temperature by Minichová, Mária, Priamushko, Tatiana, Hutzler, Andreas, Hrbek, Tomáš, Khalakhan, Ivan, Mayrhofer, Karl J.J., Cherevko, Serhiy

“…Over the last decade, in situ or online inductively coupled plasma mass spectrometry (ICP-MS) has been established as a powerful tool for time- and…”
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Electrochemical activity of the polycrystalline cerium oxide films for hydrogen peroxide detection by Kosto, Yuliia, Zanut, Alessandra, Franchi, Stefano, Yakovlev, Yurii, Khalakhan, Ivan, Matolín, Vladimír, Prince, Kevin Charles, Valenti, Giovanni, Paolucci, Francesco, Tsud, Nataliya

“…Polycrystalline cerium oxide thin films (15 nm) deposited on a glassy carbon substrate were used as an electrode in a mediator-free, non-enzymatic…”
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Irreversible structural dynamics on the surface of bimetallic PtNi alloy catalyst under alternating oxidizing and reducing environments by Khalakhan, Ivan, Vega, Lorena, Vorokhta, Mykhailo, Skála, Tomáš, Viñes, Francesc, Yakovlev, Yurii V., Neyman, Konstantin M., Matolínová, Iva

“…[Display omitted] •PtNi catalyst was investigated under alternating oxidation and reduction atmospheres.•Oxidation is characterized by Ni segregation to the…”
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Optimal Pt–Au Alloying for Efficient and Stable Oxygen Reduction Reaction Catalysts by Xie, Xianxian, Briega-Martos, Valentín, Farris, Riccardo, Dopita, Milan, Vorokhta, Mykhailo, Skála, Tomáš, Matolínová, Iva, Neyman, Konstantin M., Cherevko, Serhiy, Khalakhan, Ivan

“…Stabilization of cathode catalysts in hydrogen-fueled proton-exchange membrane fuel cells (PEMFCs) is paramount to their widespread commercialization…”
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