STRUCTURAL AND MORPHOLOGICAL PROPERTIES OF Ce<sub>1-<i>x</i></sub>M<i><sub>x</sub> </i>O<i><sub>y</sub> </i> (M = Gd, La, Mg) SUPPORTS FOR THE CATALYSTS OF AUTOTHERMAL ETHANOL CONVERSION
A complex of physicochemical methods (powder XRD analysis, transmission and scanning electron microscopy, electron spectroscopy of diffuse reflectance, low-temperature nitrogen adsorption) is used for the comparative study of structural and morphological properties of oxide supports Ce<sub>1- x </sub>M <sub>x</sub> O <sub>y</sub> (M = Gd, La, Mg; x = 0-0.5; 1.5 ≤ <i>y</i> ≤ 2.0) for catalysts for the autothermal reforming of bioethanol to a hydrogen-bearing gas. It is shown that Ce<sub>1-</sub><sub>x</sub> M <sub>x</sub> O <sub>y</sub> samples synthesized by the method of ester polymer precursors are mesoporous materials being the homogenous substitutional solid solutions with the fluorite-type cubic structure. The structural and textural properties of the Ce<sub>1-</sub><sub>x</sub> M <sub>x</sub> O <sub>y</sub> materials are regulated by varying the type of the dopant cation (M = Gd, La, Mg), the molar ratio M/Ce (0, 0.1, 0.25, 1), and heat treatment conditions (temperature 300-800 °C; duration 4-24 h). The relationship between the synthesis parameters and the characteristics of the Ce<sub>1-</sub><sub>x</sub> M <sub>x</sub> O <sub>y</sub> materials is found.