THE EFFECT OF THE STRUCTURE OF CU-TI OXIDE SYSTEMS OBTAINED BY SOL-GEL SYNTHESIS ON THE NATURE OF CATALYTIC CENTERS AND CATALYTIC ACTIVITY IN LOW-TEMPERATURE CO OXIDATION

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 ty pes 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 anata se: the first type involves Cu+ ions in the [111] crystal planes, whil e the second type involves CU2+ ions, which isomorphically substitute titanium ions in the [100] planes of TiO2.