National Repository of Grey Literature 25 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Protonově vodivé polymerní elektrolyty na bázi methakrylátů
Reiter, Jakub ; Velická, Jana ; Míka, M.
New, proton conductive electrolytes based on methacrylates and phosphoric acid were prepared. These aprotic electrolytes exhibit conductivity up to 0.1 mS/cm and they were also characterised using voltammetrical and thermogravimetrical methods.
Pokroky ve výzkumu aprotických gelových elektrolytů v České republice
Vondrák, Jiří ; Sedlaříková, M. ; Krejza, O. ; Velická, Jana
The progress of research of gel polymer electrolytes based on polymethacrylates and propylene carbonate is described. The electric conductivity and selected electrochemical processes in them is the main research field.
Počáteční potenciál redukce kyslíku v alkalických palivových článcích
Vondrák, Jiří ; Velická, Jana ; Barath, P. ; Sedlaříková, M. ; Kazelle, J. ; Kliment, J.
The onset potential of oxygen reductin was defined as the potential, below which the electroreduction of oxygen is possible. This value can be used for the comparison of various electrocatalysts. The method was tested on several carbonaceous materials onto which the same amount of platinum was deposited.
Optimalization of the system containing solar cell and electrolyzer for production of H2 and O2
Kliment, J. ; Vondrák, Jiří ; Velická, Jana ; Sedlaříková, M. ; Novák, V. ; Barath, P.
Description of factors which decrease the achievable efficiency of photoelectrolytic generation of energy.
Dvojvrstva na uhlíku v aprotických elektrolytech
Vondrák, Jiří ; Sedlaříková, M. ; Velická, Jana ; Kocian, Martin ; Špachman, V. ; Klápště, Břetislav
As carbonaceous materials we started with glassy carbon electrodes and continued to use variety pf carbon black powders, carbon nanotubes and chemically modified graphite in powderized form.
Elektrochemická aktivity elektrokatalyzátorů na bázi oxidů manganu a uhlíku
Vondrák, Jiří ; Klápště, Břetislav ; Velická, Jana ; Sedlaříková, M. ; Roche, I. ; Chainet, E. ; Chatenet, M.
New catalysts based on doped manganese oxides for oxygen reduction in fuel cells were prepared. Oxygen reduction reaction in alkaline medium was studied and the catalytical activity of the new material is comparable to the activity of platinum.
Impedance elektrody ze skelného uhlíku v PMMA-PC gelových elektrolytech
Vondrák, Jiří ; Velická, Jana ; Klápště, Břetislav
The electrochemical behaviour of the boundary glassy carbon electrode-polymer gel electrolyte was studied.
New reference electrode based on PMMA polymer electrolytes
Reiter, Jakub ; Vondrák, Jiří ; Opekar, F. ; Sedlaříková, M. ; Velická, Jana ; Klápště, Břetislav
The research on the field of polymer gel electrolytes is at the border between solid and liquid phase.
Research and development of the process for production of extra pure ammonium aluminium sulphate I
Rodová, A. ; Wildnerová, M. ; Janoš, P. ; Bezucha, P. ; Domský, V. ; Hostomský, Jiří ; Hostomská, Věra ; Velická, Jana
Research and development of the process for production of extra pure ammonium aluminium sulphate, where the concentration of contaminants does not exceed 0.3 ppm for Ca, Co, Cr, Fe, Mg, Mn, Pb, Si, Ti, Zn, 2.0 ppm for Ga, and Na and 3.0 ppm for K. Evaluation of suitable raw materials; analytical methods for determination of contaminant concentrations; determination of phase equilibria in the system sulphuric acid ů ammonium sulphate ů aluminium sulphate ů water.

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3 Velička, Jan
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