The effect of the structure of Cu-Ti oxide systems obtained by sol-gel synthesis on the nature of catalytic centres and catalytic activity in low-temperature CO oxidation
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Elena A. Trusova , Mark V. Tsodikov , Evgenii V. Slivinskii , Gustavo G. Hernandes , Olga V. Bukhtenko , Tatiana N. Zhdanova , Dmitrii I. Kochubey and Jose A. Navio
Abstract
It has been shown by X-ray diffraction analysis, EXAFS and XPS methods and in experiments on the low-temperature oxidation of CO that two types of catalytic oxidation centres are formed during sol-gel synthesis of single-phase Cu-Ti oxide systems (0.5-5.0 mass% Cu) based on anatase: the first type involves Cu+ ions in the [111] crystal planes, while the second type involves Cu2+ ions, which isomorphically substitute titanium ions in the [100] planes of TiO2.