Copper and chromium oxide nanocomposites supported on SBA-15 silica as catalysts for ethylacetate combustion: Effect of mesoporous structure and metal oxide composition

摘要

Copper and chromium oxide nanocomposite materials with different Cu/Cr ratio are prepared by deposition on silica host matrices with different textural properties and characterized by XRD, nitrogen phys-isorption, UV-Vis, FTIR, XPS and TPR-TG. Their catalytic behavior in ethylacetate total oxidation was also studied. A complex effect of Cu/Cr ratio, textural characteristics of the support and reaction medium on the phase composition of the supported active phase was found. Different mechanisms of regulation of loaded metal oxides dispersion depending on the support peculiarities were discussed. The relation between the phase composition and the catalytic properties of various bi-component materials was studied.