I
Ivan Khalakhan
Researcher at Charles University in Prague
Publications - 104
Citations - 1772
Ivan Khalakhan is an academic researcher from Charles University in Prague. The author has contributed to research in topics: Thin film & X-ray photoelectron spectroscopy. The author has an hindex of 20, co-authored 91 publications receiving 1297 citations. Previous affiliations of Ivan Khalakhan include National Institute for Materials Science.
Papers
More filters
Journal ArticleDOI
Platinum-Doped CeO2 Thin Film Catalysts Prepared by Magnetron Sputtering
Vladimír Matolín,Iva Matolínová,Michal Václavů,Ivan Khalakhan,Mykhailo Vorokhta,Roman Fiala,Igor Píš,Igor Píš,Zdeněk Sofer,Jana Poltierová-Vejpravová,Toshiyuki Mori,Valérie Potin,Hideki Yoshikawa,Shigenori Ueda,Keisuke Kobayashi +14 more
TL;DR: The synchrotron radiation X-ray photoelectron spectra showed the formation of cerium oxide with completely ionized Pt(2+,4+) species, and with the Pt( 2+)/Pt(4+) ratio strongly dependent on the substrate.
Journal ArticleDOI
High purity graphenes prepared by a chemical intercalation method.
Sharali Malik,Aravind Vijayaraghavan,Aravind Vijayaraghavan,Rolf Erni,Katsuhiko Ariga,Ivan Khalakhan,Ivan Khalakhan,Jonathan P. Hill +7 more
TL;DR: A simple method of fabricating pristine few-layer and single-layer graphene which could be used for production on a gram scale is described.
Journal ArticleDOI
Optimization of ionomer-free ultra-low loading Pt catalyst for anode/cathode of PEMFC via magnetron sputtering
Anna Ostroverkh,Viktor Johánek,Martin Dubau,Peter Kúš,Ivan Khalakhan,Břetislav Šmíd,Roman Fiala,Roman Fiala,Michal Václavů,Yevhenii Ostroverkh,Vladimír Matolín +10 more
TL;DR: In this article, thin-film Pt catalysts with ultra-low metal loadings were prepared by magnetron sputtering onto various carbon-based substrates, and the performance of these catalysts acting as anode, cathode, or both electrodes in a proton exchange membrane fuel cell (PEMFC) was investigated in H2/O2 and H 2/air mode.
Journal ArticleDOI
Pt–CeOx thin film catalysts for PEMFC
Roman Fiala,Michal Vaclavu,Andrii Rednyk,Ivan Khalakhan,Mykhailo Vorokhta,Jaroslava Lavkova,Valérie Potin,Iva Matolínová,Vladimír Matolín +8 more
TL;DR: In this paper, the authors measured Pt-CeOx thin film anode catalyst activity in a hydrogen PEMFC and compared it with performance of a standard reference cell, using photoelectron spectroscopy.
Journal ArticleDOI
High efficiency of Pt2+- CeO2 novel thin film catalyst as anode for proton exchange membrane fuel cells
Roman Fiala,Alberto Figueroba,Albert Bruix,Michal Vaclavu,Andrii Rednyk,Ivan Khalakhan,Mykhailo Vorokhta,Jaroslava Lavkova,Jaroslava Lavkova,Francesc Illas,Valérie Potin,Iva Matolínová,Konstantin M. Neyman,Konstantin M. Neyman,Vladimír Matolín +14 more
TL;DR: In this article, a family of novel anode catalysts consisting of thin films of ceria with low Pt loadings sputtered on a nanostructured carbon support was designed to increase the cost-efficiency in proton exchange membrane fuel cells.