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1536831 
Journal Article 
Synthesis and Characterization of Ordered CuO-CeO2 Mixed Oxides Using KIT-6 Silica as a Hard Template 
Djinovic, P; Kocjan, U; Batista, J; Pintar, A 
2009 
Yes 
Acta Chimica Slovenica
ISSN: 1318-0207 
56 
4 
868-877 
WOS:000273279400014 
This study focuses on the synthesis of CuO-CeO2 mixed oxides containing 10, 15 and 20 mol % CuO using hard template method with KIT-6 silica acting as a template. The obtained solids exhibited ordered mesoporous structure, which was identified by N-2 adsorption/desorption and XRD analyses as a negative mold of the KIT-6 silica pore system. The materials were additionally characterized by H-2-TPR/TPD, H-2-TPR/TPO/TPR, selective N2O chemisorption and NH3 chemisorption/TPD methods. These methods revealed very high surface area being in the range of 147-166 m(2)/g, depending on CuO content and calcination temperature. CuO dispersion values between 28 and 40% were determined by N2O decomposition with corresponding CuO particle size between 1.3 and 1.9 nm. H-2/TPR-TPO-TPR tests revealed negligible alterations in pore size/volume of calcined solids, indicating good thermal stability of CeO2 framework under tested conditions. On the other hand, migration and stabilization of surface CuO clusters was detected upon redox cycling, which resulted in noticeable differences in redox behavior. Nevertheless, the ordered and highly porous CuO-CeO2 materials exhibited superior thermal stability, good redox properties and surface acidity, which render hard template preparation method very useful for the synthesis of ordered mesoporous mixed metal oxides with vast possibilities for future applications in catalysis. 
Hard template synthesis method; KIT-6 silica; CuO-CeO2 mixed oxides