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Effect of Precursor Synthesis on Catalytic Activity of Co3O4 in N2O Decomposition
Chromčáková, Ž. ; Obalová, L. ; Kovanda, F. ; Pacultová, K. ; Kukutschová, J. ; Michalik, S. ; Kustrowski, P. ; Jirátová, Květa
The correlation between methods of preparation, phase composition of precursors, catalytic properties of the related oxide catalysts, and the role of the cobalt ions as catalytic active sites is discussed.
Plný tet: SKMBT_C22014090213370 - PDF Plný text: content.csg - PDF
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Co-Mn-Al Spinel Catalyst for Removal of N2O from Nitric Acid Plant Tail Gases
Obalová, L. ; Karásková, K. ; Kovanda, F. ; Jirátová, Květa ; Šrámek, J. ; Kustrowski, P. ; Chromčáková, Ž. ; Kočí, K. ; Borovec, K. ; Dej, M.
Plný tet: SKMBT_C22013110615453 - PDF Plný text: content.csg - PDF
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Sol-Gel Derived Au-Enriched TiO2 and TiO2-ZrO2 Photocatalysts and Their Examination in Photocatalytic Reduction of Carbon Dioxide
Matějová, Lenka ; Reli, M. ; Čapek, L. ; Matějka, V. ; Šolcová, Olga ; Obalová, L. ; Kočí, K.
Considering the aspects of preparation of gold-based photocatalysts and gold photocatalysis, it is worth a mention that it is more complicated issue than in the case of other noble metals due to the gold crystallinity. In this contribution some critical aspects of the gold photocatalysis will be discussed. Au-supported TiO2 and TiO2-ZrO2 photocatalysts and their pristine counterparts were prepared by using the sol-gel process controlled within reverse micelles environment and by impregnation under vacuum. All photocatalysts were characterized by OEA, ICP/MS, N2 physisorption, XRD, TEM/SEAD and UV-Vis. The performance of laboratory-prepared photocatalysts was examined in CO2 photocatalytic reduction and was compared with the catalytic performance of commercial TiO2 Evonic P25. Logically, the determined physicochemical and optical properties of photocatalysts were correlated with their catalytic performance and some interesting aspects of gold photocatalysis were revealed.
Plný tet: SKMBT_C22013080910510 - PDF Plný text: content.csg - PDF
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Rozklad N2O na promotovaných směsných oxidických katalyzátorech.
Galejová, K. ; Obalová, L. ; Pacultová, K. ; Lacný, Z. ; Kovanda, F. ; Jirátová, Květa
Směsné Co-Mn-Al oxidické katalyzátory byly promotovány kovy Pd, Pt, La, K a Ce. V simulovaných procesních podmínkách (v přítomnosti O2, NO, NO2, H2O) byla zjišťována aktivita a regenerace katalyzátorů. Jako nejaktivnější katalyzátor byl vyhodnocen katalyzátor s 3 % hm. draslíku.
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