Excimer Laser-Induced CVD of Carbon Encapsulated Cobalt Nanoparticles
Fajgar, Radek; Maryško, Miroslav; Dřínek, Vladislav; Kupčík, Jaroslav; Šubrt, Jan
2011 - English Decomposition of acetylene / Co(CO)(3)(NO)mixtures induced by excimer ArF laser pulses is an efficient technique for preparation of amorphous cobalt nanoparticles encapsulated in carbon. Vacuum heating up to 900 degrees C leads to crystallization the metal core. The cobalt core crystallizes in a face-centered cubic (beta) form as revealed by X-ray and electron diffraction techniques and carbon affords graphite outer part. Properties of the Co(core) - carbon(shell)nanocomposites were examined by spectroscopy and microscopy techniques. Magnetization studies revealed paramagnetic behavior of the as-prepared amorphous deposit and superparamagnetic behavior of the annealed samples. Keywords: amorphous cobalt nanoparticles; carbon encapsulation; magnetic properties Available at various institutes of the ASCR Excimer Laser-Induced CVD of Carbon Encapsulated Cobalt Nanoparticles

Decomposition of acetylene / Co(CO)(3)(NO)mixtures induced by excimer ArF laser pulses is an efficient technique for preparation of amorphous cobalt nanoparticles encapsulated in carbon. Vacuum ...

Fajgar, Radek; Maryško, Miroslav; Dřínek, Vladislav; Kupčík, Jaroslav; Šubrt, Jan
Ústav chemických procesů, 2011

Adsorption Assisted Ion Exchanger Catalyst for Fatty Acid Esterification
Jeřábek, Karel; Holub, Ladislav; Hanková, Libuše; Corain, B.; Centomo, P.; Zecca, M.
2011 - English Keywords: fatty acid; esterification Available at various institutes of the ASCR Adsorption Assisted Ion Exchanger Catalyst for Fatty Acid Esterification

Jeřábek, Karel; Holub, Ladislav; Hanková, Libuše; Corain, B.; Centomo, P.; Zecca, M.
Ústav chemických procesů, 2011

Optimized Doped Titania for Photocatalysis Applications
Krejčíková, Simona; Kočí, K.; Obalová, L.; Čapek, L.; Šolcová, Olga
2011 - English This study is focused on preparation and characterization of the specially designed TIO2 and its modified versions (doped by metal) suitable for photodegradations of organic pollutants. Keywords: titanium dioxide; siver; photocatalysis Available at various institutes of the ASCR Optimized Doped Titania for Photocatalysis Applications

This study is focused on preparation and characterization of the specially designed TIO2 and its modified versions (doped by metal) suitable for photodegradations of organic pollutants.

Krejčíková, Simona; Kočí, K.; Obalová, L.; Čapek, L.; Šolcová, Olga
Ústav chemických procesů, 2011

Domain Averaged Fermi hole Orbitals for Extended Systems
Baranov, A.I.; Kohout, M.; Ponec, Robert
2011 - English Current contribution presents the results of DAFH orbital analysis for several simple model systems like hydrogen lattices as well as for prototypic real solids with covalent, ionic and metallic bonding. Keywords: domain averaged fermi holes; bonding in solids Available at various institutes of the ASCR Domain Averaged Fermi hole Orbitals for Extended Systems

Current contribution presents the results of DAFH orbital analysis for several simple model systems like hydrogen lattices as well as for prototypic real solids with covalent, ionic and metallic ...

Baranov, A.I.; Kohout, M.; Ponec, Robert
Ústav chemických procesů, 2011

How to Improve Julabo Operation for FMU2?
Křišťál, Jiří
2011 - English The report describes the procedure for improving the heating system of FMU2 by modifing the control strategy for the Julabo heater Keywords: control; heating; pilot plant equiptment Available at various institutes of the ASCR How to Improve Julabo Operation for FMU2?

The report describes the procedure for improving the heating system of FMU2 by modifing the control strategy for the Julabo heater

Křišťál, Jiří
Ústav chemických procesů, 2011

Theoretical Interpretation of Enantioselectivity Trends in (R)-Ru-BINAP Catalyzed Hydrogenation of Methylacetoacetate in the QAS Ionic Liquid Phase
Dytrych, Pavel; Klusoň, Petr; Floriš, Tomáš; Lísal, Martin; Slater, M.
2011 - English An essential part of this work was focused on the role of the alkyl chain length in NR 222Tf2N and its reflection in the evaluated kinetic parameters. For this screening NR 222Tf2N was mixed with methanol using the one-to-one weight ratio. Keywords: kinetic parameters; molecular simulation methods; evaluation Available at various institutes of the ASCR Theoretical Interpretation of Enantioselectivity Trends in (R)-Ru-BINAP Catalyzed Hydrogenation of Methylacetoacetate in the QAS Ionic Liquid Phase

An essential part of this work was focused on the role of the alkyl chain length in NR 222Tf2N and its reflection in the evaluated kinetic parameters. For this screening NR 222Tf2N was mixed with ...

Dytrych, Pavel; Klusoň, Petr; Floriš, Tomáš; Lísal, Martin; Slater, M.
Ústav chemických procesů, 2011

A New Look on the Nernst Model in Electrochemistry
Wein, Ondřej
2011 - English The present paper is inspired by the electrodiffusion (ED) flow measurement, utilizing the limiting-diffusion regime (LDR) in two-electrode ED cells. The electrochemical testing and calibrations of the ED cells is based on two standard electrochemical techniques - quasi-steady voltammetry and voltage-step transient. Recently published theory of the voltage-step transient under simultaneous effect of Faradaic and Ohmic resistances is based on a suitably extended Nernst model. An analogous theory of the voltammetric experiment is presented here. Keywords: nernst model of diffusion layer; primary current distribution; voltammetric curve Available at various institutes of the ASCR A New Look on the Nernst Model in Electrochemistry

The present paper is inspired by the electrodiffusion (ED) flow measurement, utilizing the limiting-diffusion regime (LDR) in two-electrode ED cells. The electrochemical testing and calibrations of ...

Wein, Ondřej
Ústav chemických procesů, 2011

Kogenerace s využitím biomasy, vhodné výkony a možnosti efektivního využití tepla
Svoboda, Karel
2011 - English Výhody a nevýhody kogenerace na bázi biomasy jsou srovnány se spolu-spalováním biomasy s fosilními palivy (uhlím). Vhodná paliva na bázi biomasy pro kogeneraci zahrnují hlavně dřevo a slámu, organické odpady, kaly z čistíren odpadních vod, odpadní rostlinné oleje a bioplyn. Spalování a zplyňování jsou nejpoužívanější termické procesy pro ko-generaci tepla a elektrické energie. Motory a plynové turbíny s vnitřním nebo vnějším spalováním, parní nebo ORC turbíny jsou nejobvyklejšími metodami pro kogeneraci. Palivové články vhodné pro kogeneraci jsou stále ve vývoji. Keywords: biomass; cogeneration; efficiency Available at various institutes of the ASCR Kogenerace s využitím biomasy, vhodné výkony a možnosti efektivního využití tepla

Výhody a nevýhody kogenerace na bázi biomasy jsou srovnány se spolu-spalováním biomasy s fosilními palivy (uhlím). Vhodná paliva na bázi biomasy pro kogeneraci zahrnují hlavně dřevo a slámu, ...

Svoboda, Karel
Ústav chemických procesů, 2011

LC-NMR Analysis of Phenylsilane Polymers
Pinkas, Jiří; Merna, J.; Sýkora, Jan
2011 - English We report the analysis of dehydrocoupling polymerization reactions of phenylsilane via on-flow LC-NMR experiment. The successful separation was achieved by isocratic elution of acetonitrile and aceton (80:20). The separation was solely monitored by 1H NMR detection. The properties of the polymeric product depend on the catalytical system. The products can differ in the molar weight distribution, degree of branching and amount of cyclic and rearranged products. In our particular cases, the weight average molar mass (Mw) varies from several silane units up to 4100 g.mol-1. The branching of polysilanes is monitored by 29Si{1H} INEPT experiment with the polarization transfer from the ortho hydrogen (J~7 Hz). The connectivity within branched unit was established via 1H à 29Si-29Si INEPT-INADEQUATE experiment. Keywords: phenylsilanes; LC-NMR; 29Si NMR Available at various institutes of the ASCR LC-NMR Analysis of Phenylsilane Polymers

We report the analysis of dehydrocoupling polymerization reactions of phenylsilane via on-flow LC-NMR experiment. The successful separation was achieved by isocratic elution of acetonitrile and aceton ...

Pinkas, Jiří; Merna, J.; Sýkora, Jan
Ústav chemických procesů, 2011

Density and Viscosity of Alkylammonium-Based Ionic Liquids
Machanová, Karolina; Sedláková, Zuzana; Boisset, A.; Bendová, Magdalena; Jacquemin, J.; Aim, Karel
2011 - English Keywords: ionic liquids; thermophysical properties Available at various institutes of the ASCR Density and Viscosity of Alkylammonium-Based Ionic Liquids

Machanová, Karolina; Sedláková, Zuzana; Boisset, A.; Bendová, Magdalena; Jacquemin, J.; Aim, Karel
Ústav chemických procesů, 2011