Исследовано влияние облучения потоком ускоренных электронов на каталитические свойства PdO/CeO2. Установлено, что при проведении облучения в интервале 15–30 кГр происходит увеличение концентрации анион-радикала [О–], что приводит к повышению каталитической активности PdO/CeO2.

There were synthesized catalysts based on high-porous cellular materials by means of d- and f-elements oxides' impregnation. There were inves-tigated their textural characteristics and catalytic activity in oxidative reactions in gas and liquid phase. Received catalysts will be prospective for treatment of gas emissions and wastewater of industrial enterprises.

Nanoparticulate catalysts M/Ce0,72Zr0,18Pr0,1O2, where M – Pt, Pd, Ru at 0,5; 1,0 and 2,0 wt.%, for diesel exhaust soot afterburning in a «weak» contact were synthesized. Structural, textural and catalytic properties of the samples were studied using EDX, X-ray synchrotron diffraction, XANES, EXAFS, TEM, low-temperature nitrogen adsorption and TG-DSC. It is shown that in the process of impregnating of platinum metals on the surface of the support Ce0,72Zr0,18Pr0,1O2, metal-support interaction occurs and increases in a line Pt → Pd → Ru. Ruthenium-ontaining catalysts are the most active in the soot afterburning, not only due to the nature of the supported component, but relatively faint metal-support interaction as compared with platinum and palladium samples. For them it is characterized the reduction of start oxidation temperature on 190 °C and lowering the temperature of complete oxidation approximately on 120 °C compared with the same parameters for the support without platinum. Due to the high activity of 0,5%Ru/Ce0,72Zr0,18Pr0,1O2 the opportunity for effective cleaning of diesel soot emissions are created by using relatively small amounts of the precious metal, which will reduce the cost of catalytic converters of diesel emissions.

There are synthesized nanostructured solid solutions of Me-Zr-Ce-O (Me = Sc, Y, La, Pr, Nd, Sm) based on the cubic fluorite lattice of ceria. By the methods of X-ray fluorescence analysis, BET and gas chromatography, there are studied structural and catalytic properties of the samples. The catalysts have high catalytic activity and thermal stability, which indicates the possibility of their use in the process of detoxification of gaseous media from carbon monoxide.

Nanostructured solid solution of Mn0,5Ce0,5O2 is synthesized in order to develop an efficient catalysts for detoxification of man-made pollutants that do not contain precious metals. Its chemical and phase composition, texture characteristics were studied by DTA, XRD, laser mass spectrometry and low-temperature nitrogen adsorption. The activity of the solid solution is determined by the flow method in the oxidation of carbon monoxide in the temperature range 20– 300 ° C at atmospheric pressure, space velocity of the gas mixture 1800 h–1 and the composition of the gas mixture (vol.%): CO – 3,6, O2 – 8,0; N2 – balance. It is shown that the activity of Mn0,5Ce0,5O2 significantly higher activity MnOx and CeO2: 100% conversion temperature of – 92, 120, 210 ° C, respectively. Nanostructured catalysts Su/Mn0,5Ce0,5O2 and Ag/Mn0,5Ce0,5O2 prepared by impregnation method using a solid solution as a support. These catalysts show a high activity in the oxidation of carbon monoxide: the temperature of 100 % conversion is – 77 °С and 85 °C, respectively. New catalysts are of interest for the cleaning processes of vehicle emissions and industrial enterprises.