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Dive into the research topics where Klára Ševčíková is active.

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Featured researches published by Klára Ševčíková.


Journal of Chemical Physics | 2015

Adenine adlayers on Cu(111): XPS and NEXAFS study.

Nataliya Tsud; Sofiia Bercha; Klára Ševčíková; Robert G. Acres; Kevin C. Prince; Vladimír Matolín

The adsorption of adenine on Cu(111) was studied by photoelectron and near edge x-ray absorption fine structure spectroscopy. Disordered molecular films were deposited by means of physical vapor deposition on the substrate at room temperature. Adenine chemisorbs on the Cu(111) surface with strong rehybridization of the molecular orbitals and the Cu 3d states. Annealing at 150 °C caused the desorption of weakly bonded molecules accompanied by formation of a short-range ordered molecular adlayer. The interface is characterized by the formation of new states in the valence band at 1.5, 7, and 9 eV. The present work complements and refines existing knowledge of adenine interaction with this surface. The coverage is not the main parameter that defines the adenine geometry and adsorption properties on Cu(111). Excess thermal energy can further rearrange the molecular adlayer and, independent of the initial coverage, the flat lying stable molecular adlayer is formed.


Chemsuschem | 2014

The Mechanism of Hydrocarbon Oxygenate Reforming: CC Bond Scission, Carbon Formation, and Noble-Metal-Free Oxide Catalysts

Yaroslava Lykhach; Armin Neitzel; Klára Ševčíková; Viktor Johánek; Nataliya Tsud; Tomáš Skála; Kevin C. Prince; Vladimír Matolín; Jörg Libuda

Towards a molecular understanding of the mechanism behind catalytic reforming of bioderived hydrocarbon oxygenates, we explore the C-C bond scission of C2 model compounds (acetic acid, ethanol, ethylene glycol) on ceria model catalysts of different complexity, with and without platinum. Synchrotron photoelectron spectroscopy reveals that the reaction pathway depends very specifically on both the reactant molecule and the catalyst surface. Whereas C-C bond scission on Pt sites and on oxygen vacancies involves intermittent surface carbon species, the reaction occurs without any carbon formation and deposition for ethylene glycol on CeO2(111).


Angewandte Chemie | 2014

Maximum noble-metal efficiency in catalytic materials: atomically dispersed surface platinum.

Albert Bruix; Yaroslava Lykhach; Iva Matolínová; Armin Neitzel; Tomáš Skála; Nataliya Tsud; Mykhailo Vorokhta; Vitalii Stetsovych; Klára Ševčíková; Josef Mysliveček; Roman Fiala; Michal Václavů; Kevin C. Prince; Stéphanie Bruyère; V. Potin; Francesc Illas; Vladimír Matolín; Jörg Libuda; Konstantin M. Neyman


Journal of Physical Chemistry C | 2016

Atomically Dispersed Pd, Ni, and Pt Species in Ceria-Based Catalysts: Principal Differences in Stability and Reactivity

Armin Neitzel; Alberto Figueroba; Yaroslava Lykhach; Tomáš Skála; Mykhailo Vorokhta; Nataliya Tsud; Sascha Mehl; Klára Ševčíková; Kevin C. Prince; Konstantin M. Neyman; Vladimír Matolín; Jörg Libuda


Applied Surface Science | 2015

Impact of Rh–CeOx interaction on CO oxidation mechanisms

Klára Ševčíková; Tatiana Kolářová; Tomáš Skála; Nataliya Tsud; Michal Václavů; Yaroslava Lykhach; Vladimír Matolín; V. Nehasil


Angewandte Chemie | 2014

Auf dem Weg zu größtmöglicher Effizienz bei der katalytischen Nutzung von Edelmetallen: atomar dispergiertes Oberflächen‐Platin

Albert Bruix; Yaroslava Lykhach; Iva Matolínová; Armin Neitzel; Tomáš Skála; Nataliya Tsud; Mykhailo Vorokhta; Vitalii Stetsovych; Klára Ševčíková; Josef Mysliveček; Roman Fiala; Michal Václavů; Kevin C. Prince; Stéphanie Bruyère; V. Potin; Francesc Illas; Vladimír Matolín; Jörg Libuda; Konstantin M. Neyman


Applied Surface Science | 2014

HAXPES study of CeOx thin film–silicon oxide interface

Mykhailo Vorokhta; Iva Matolínová; Martin Dubau; S. Haviar; Ivan Khalakhan; Klára Ševčíková; Toshiyuki Mori; Hideki Yoshikawa; Vladimír Matolín


Journal of Physical Chemistry C | 2016

Experimental and Theoretical Study on the Electronic Interaction between Rh Adatoms and CeOx Substrate in Dependence on a Degree of Cerium Oxide Reduction

Klára Ševčíková; Lucie Szabová; Miroslav Kettner; Petr Homola; Nataliya Tsud; Stefano Fabris; Vladimír Matolín; V. Nehasil


Materials Research Bulletin | 2015

Altering properties of cerium oxide thin films by Rh doping

Klára Ševčíková; V. Nehasil; Mykhailo Vorokhta; S. Haviar; Vladimír Matolín; Iva Matolínová; K. Mašek; Igor Píš; Keisuke Kobayashi; Masaaki Kobata; Takahiro Nagata; Yoshitaka Matsushita; Hideki Yoshikawa


International Journal of Hydrogen Energy | 2016

Magnetron sputtered Ir thin film on TiC-based support sublayer as low-loading anode catalyst for proton exchange membrane water electrolysis

Peter Kúš; Anna Ostroverkh; Klára Ševčíková; Ivan Khalakhan; Roman Fiala; Tomáš Skála; Nataliya Tsud; Vladimír Matolín

Collaboration


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Vladimír Matolín

Charles University in Prague

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Nataliya Tsud

Charles University in Prague

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Tomáš Skála

Charles University in Prague

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V. Nehasil

Charles University in Prague

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Mykhailo Vorokhta

Charles University in Prague

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Yaroslava Lykhach

University of Erlangen-Nuremberg

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Kevin C. Prince

Elettra Sincrotrone Trieste

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Iva Matolínová

Charles University in Prague

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Michal Václavů

Charles University in Prague

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Armin Neitzel

University of Erlangen-Nuremberg

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