Applied Catalysis A: General, Vol.406, No.1-2, 13-21, 2011
Structure and catalytic activity of hosted in mesoporous silicas copper species: Effect of preparation procedure and support pore topology
Copper modifications of ordered mesoporous materials with different pore topology (SBA-15 and KIT-6) were prepared by incipient wetness impregnation and "chemisorption-hydrolysis" methods and further oxidative or consecutive oxidative/reductive treatment. The samples were characterized by nitrogen physisorption, XRD, XPS, FTIR, UV-vis and TPR-TG techniques. The ordered structures and the "chemisorption-hydrolysis" post synthetic method provide the formation of homogeneously dispersed in the mesopores copper species. The "chemisorption-hydrolysis" modification of the silicas with more opened 3D ordered structure (KIT-6) provides the formation of highly active catalysts, but their activity could be easily suppressed after the treatment under the reduction medium. (C) 2011 Elsevier B.V. All rights reserved.
Keywords:SBA-15;KIT-6;Copper modifications;Pore topology effect;Post-synthesis modification;Methanol decomposition