The study of catalysts based on a Ce0.72Zr0.18Pr0.1O2 solid solution with Pt, Pd, and Ru supported from acetylacetonate precursors showed their high activity in the processes of CO and methane oxidation. Transmission electron microscopy, X-ray absorption spectroscopy, and X-ray photoelectron spectroscopy were used for determining the nature of the active sites of the catalysts. The metal-support interaction effect, which increased in the order Ru < Pd < Pt, was found, and a relationship between the intensity of this interaction and the catalytic action was established.

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.

Исследование катализаторов на основе твердого раствора Ce0.72Zr0.18Pr0.1O2 c нанесенными Pt, Pd и Ru из ацетилацетонатных прекурсоров показало их высокую активность в процессах окисления CO и метана. Для установления природы активных центров катализаторов применялись методы: просвечивающей электронной микроскопии, рентгеновской абсорбционной спектроскопии и рентгеновской фотоэлектронной спектроскопии. Обнаружен эффект взаимодействия металл–носитель, усиливающийся в ряду Ru < Pd < Pt, и установлена взаимосвязь между интенсивностью такого взаимодействия и каталитическим действием.

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.

Nanodisperse M/Ce 0.72 Zr 0.18 Pr 0.1 O 2 catalysts, where M is Pt, Pd, and Ru in amounts of 0.5, 1.0, and 2.0 wt %, for the afterburning of carbon black in the exhaust fumes of diesel engines under the conditions of a weak contact are synthesized. The structural, textural, and catalytic properties of the samples are studied by means of energy dispersive X-ray spectroscopy (EDX), synchrotron X-ray diffraction, X-ray absorption near-edge spectroscopy (XANES), extended X-ray absorption fine structure (EXAFS), transmission electronic microscopy (TEM), low-temperature nitrogen adsorption, and thermogravimetric analysis-differential scanning calorimetry (TG-DSC). It is shown that metal-support interaction, growing in the order Pt → Pd → Ru, occurs as platinum metals are impregnated into the surface of a Ce 0.72 Zr 0.18 Pr 0.1 O 2 support. Ruthenium-containing catalysts are the ones most active for the afterburning of carbon black, due not only by the nature of the impregnated component, but also to the relatively ill-defined metal-support interaction, as compared to platinum and palladium samples. An ∼190°C drop in the temperature of oxidation onset and an ∼120°C drop in the temperature of complete oxidation, relative to these same parameters for a support free of platinum group elements, is characteristic of these. The high activity of 0.5%Ru/Ce 0.72 Zr 0.18 Pr 0.1 O 2 enables us to purify diesel exhausts of carbon black effectively while using relatively small amounts of the noble metal, making it possible to lower the price of catalyst converters of diesel exhausts.