Science & teaching

Originally, I was educated in physics. However, as the time went on I slightly diverged and ended up at the boundary of physics and chemistry. Formerly, I worked at CERN, after obtaining a PhD degree from MFF UK in 2001 as a postdoc at FHI of Max Planck Institute in Berlin, and later at the chemistry departments of University of California Irvine and University of Virginia. Currently I'm employed as a research scientist at the MFF of Charles University in Prague.

I've been maily focused on problems of chemical catalysis on solid surfaces and related nanomaterials which I study experimentally under ultrahigh vacuum conditions (pressures typically 10-13 atm.) as well as under realistic conditions. Those interested in my work are welcome to read my research papers.

Apart from that there are other fields of physics and chemistry I've been following to a certain extent, namely fotovoltaics, fuel cells, microelectronics, some issues of cosmology etc.

Teaching and lectures

My work outcome

Selected Publications (newest first)

  • Tovt A., Bagolini L., Dvořák F., Tran N.-D., Vorokhta M., Beranová K., Johánek V., Camellone M.F., Skála T., Matolínová I., Mysliveček J., Fabris S., Matolín V.: Controlling Pt dispersion on ceria by surface oxygen content, J. Mat. Chem. A (2019)
  • Johánek V., Nehasil V., Skála T., Tsud N.: Carbon Chain Length Dependence of Graphene Formation via Thermal Decomposition of Alkenes on Pt(111), J. Phys. Chem. C (2019)
  • Dvořák F., Szabová L., Johánek V., Camellone M.F., Stetsovych V., Vorokhta M., Tovt M., Skála T., Matolínová I., Tateyama Y., Mysliveček J., Fabris S., Matolín V.: Bulk hydroxylation and effective water splitting by highly reduced cerium oxide: The role of O vacancy coordination, ACS Catal. 8 (5) (2018) p. 4354
  • Ostroverkh A., Johánek V., Kúš P., Šedivá R., Matolín V.: Efficient ceria-platinum inverse catalyst for partial oxidation of methanol, Langmuir 32 (25) (2016) p. 6297
  • Lykhach Y., Kozlov S.M., Skála T., Tovt A., Stetsovych V., Tsud N., Dvořák F., Johánek V., Neitzel A., Mysliveček J., Fabris S., Matolín V., Neyman K.M., Libuda J.: Counting Electrons on Catalyst Nanoparticles, Nat. Mater. 15 (3) (2016) p. 284
  • Cushing G.W., Johánek V., Navin J.K., Harrison I.: Graphene Growth on Pt(111) by Ethylene Chemical Vapor Deposition at Surface Temperatures near 1000 K, J. Phys. Chem. C 119 (9) (2015) p. 4759
  • Lykhach Y., Neitzel A., Ševčíková K., Johánek V., Tsud N., Skála T., Prince K.C., Matolín V., Libuda J.: The Mechanism of Hydrocarbon Oxygenate Reforming: C-C Bond Scission, Carbon Deposition, and Noble-Metal-Free Oxide Catalysts, ChemSusChem 7 (1) (2014) p. 77
  • Lykhach Y., Happel M., Johánek V., Skála T., Kollhoff F., Tsud N., Dvořák F., Prince K.C., Matolín V., Libuda J.: Adsorption and decomposition of formic acid on model ceria and Pt/ceria catalysts, J. Phys. Chem. C 117 (24) (2013) p. 12483
  • Lykhach Y., Johánek V., Aleksandrov H.A., Kozlov S.M., Happel M., Skála T., Petkov P.St., Tsud N., Vayssilov G.N., Prince K.C., Neyman K.M., Matolín V., Libuda J.: Water chemistry on model ceria and Pt/ceria catalysts, J. Phys. Chem. C 116 (22) (2012) p. 12103
  • Happel M., Mysliveček J., Johánek V., Dvořák F., Stetsovych O., Lykhach Y., Matolín V., Libuda J.: Adsorption sites, metal support interactions, and oxygen spillover identified by vibrational spectroscopy of adsorbed CO: A reference study on Pt/Ceria model catalysts, J. Catal. 289 (2012) p. 118
  • Matolín V., Matolínová I., Dvořák F., Johánek V., Mysliveček J., Prince K.C., Skála T., Stetsovych O., Tsud N., Václavů M., Šmíd B.: Water interaction with CeO2(111)/Cu(111) model catalyst surface, Catal. Today 181 (1) (2012) p. 124
  • Cushing G.W., Navin J.K., Donald S.B., Valadez L., Johánek V., Harrison I.: C-H Bond Activation of Light Alkanes on Pt(111): Dissociative Sticking Coefficients, Evans-Polanyi Relation, and Gas-Surface Energy Transfer, J. Phys. Chem. C 114 (40) (2010) p. 17222
  • Matolín V., Johánek V., Škoda M., Tsud N., Prince K.C., Skála T., Matolínová I.: Methanol adsorption and decomposition on Pt/CeO2(111)/Cu(111) thin film model catalyst, Langmuir 26 (16) (2010) p. 13333
  • Johánek V., de la Ree A., Hemminger J.C.: Scanning Tunneling Microscopy investigation of the conversion of ethylene to carbon clusters and graphite on Pt(111), J. Phys. Chem. C 113 (11) (2009) p. 4441
  • Brown M.A., Johánek V., Hemminger J.C.: A unique dosing system for the production of OH under high vacuum for the study of environmental heterogeneous reactions, Rev. Sci. Instr. 79 (2) (2008) art. # 024101
  • Laurin M., Johánek V., Grant A.W., Kasemo B., Libuda J., Freund H.-J.: Transient and Steady State CO Oxidation Kinetics on Nanolithographically Prepared Supported Pd Model Catalysts: Experiments and Simulations, J. Chem. Phys. 123 (5) (2005) art. # 054701
  • Johánek V., Schauermann S., Laurin M., Gopinath C.S., Libuda J., Freund H.-J.: On the Role of Different Adsorption and Reaction Sites on Supported Nanoparticles During a Catalytic Reaction: NO Decomposition on a Pd/Alumina Model Catalyst, J. Phys. Chem. B 108 (38) (2004) p. 14244
  • Johánek V., Laurin M., Grant A.W., Kasemo B., Henry C.R., Libuda J.: Fluctuations and Bistabilities on Catalyst Nanoparticles, Science 304 (2004) p. 1639
  • Johánek V., Schauermann S., Laurin M., Libuda J., Freund H.-J.: Site-Occupation and Activity of Catalyst Nanoparticles Monitored by In-situ Spectroscopy, Angew. Chem. Int. Ed. 42 (26) (2003) p. 3035
  • Yudanov I.V., Sahnoun R., Neyman K.M., Rösch N., Hoffmann J., Schauermann S., Johánek V., Unterhalt H., Rupprechter G., Libuda J., Freund H.-J.: CO Adsorption on Pd Nanoparticles: Density Functional and Vibrational Spectroscopy Studies, J. Phys. Chem. B 107 (1) (2003) p. 255
  • Schauermann S., Hoffmann J., Johánek V., Hartmann J., Libuda J., Freund H.-J.: The Molecular Origins of Selectivity in Methanol Decomposition on Pd Nanoparticles, Catal. Lett. 84 (3-4) (2002) p. 209
  • Schauermann S., Hoffmann J., Johánek V., Hartmann J., Libuda J., Freund H.-J.: Catalytic Activity and Poisoning of Specific Sites on Supported Metal Nanoparticles, Angew. Chem. Int. Ed. 41 (14) (2002) p. 2532
  • Johánek V., Stará I., Matolín V.: Role of Pd-Al Bimetallic Interaction in CO Adsorption and Catalytic Properties of PdAl System: XPS, TDS, ISS, SIMS Study, Surf. Sci. 507-510 (2002) p. 92
  • Tsud N., Johánek V., Stará I., Veltruská K. and Matolín V.: XPS and TPD Study of Pd-Sn Interaction on Pd-SnOx Systems, Thin Solid Films 391 (2001) p. 204
  • Matolín V., Stará I., Tsud N., Johánek V.: XPS and TDS Study of CO Interaction with Pd-AlOx Systems, Prog. Surf. Sci. 67 (1-8) (2001) p. 167
  • Tsud N., Johánek V., Stará I., Veltruská K. and Matolín V.: CO Adsorption on Palladium Model Catalysts: XPS Pd-Al2O3 Interaction Study, Surf. Sci. 467 (1-3) (2000) p. 169
  • Benvenuti C., Cazeneuve J.M., Chiggiato P., Cicoira F., Escudeiro Santana A., Johanek V., Ruzinov V., Fraxedas J.: A novel route to extreme vacua: the non-evaporable getter thin film coatings, Vacuum 53 (1-2) (1999) p. 219

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My jobs

Links to all my former and current employers:

Universita Karlova (Praha)
   -  Matematicko-fyzikální fakulta (MFF)
      - Katedra elektroniky a vakuové fyziky (KEVF)
         - Skupina fyziky povrchů KEVF MFF UK
Akademie věd ČR (Praha)
   - Institute of Electrical Engineering AVČR

CERN - European Laboratory for Particle Physics (Genève)
   - Division EST
         - SM group
   -  Fritz-Haber-Institut (Berlin)
      - Department of Chemical Physics
         - Molecular Beam Group
University of California, Irvine (Irvine)
   - Department of Chemistry
      - Hemminger Research Group
University of Virginia (Charlottesville)
   - Department of Chemistry
      - Harrison Research Group
Universita Karlova (Praha)
   -  Matematicko-fyzikální fakulta (MFF)
      - Katedra fyziky povrchů a plazmatu (KFPP)
         - Skupina fyziky povrchů KFPP MFF UK