Structural and morphological properties of Ce1–x M x O y (M = Gd, La, Mg) supports for the catalysts of autothermal ethanol conversion

• Published in: Journal of structural chemistry 2017-01, Vol.58 (1), p.126-134
• Main Authors: Kerzhentsev, M. A., Matus, E. V., Ismagilov, I. Z., Ushakov, V. A., Stonkus, O. A., Larina, T. V., Kozlova, G. S., Bharali, P., Ismagilov, Z. R.
• Format: Article
• Language: English
• Subjects: Catalysts; Cerium oxides; Comparative studies; Cube texture; Ethanol; Fluorite; Gadolinium; Heat treatment; Lanthanum; Low temperature; Morphology; Prepolymers; Reforming; Solid solutions; Substitutional solid solutions
• ISSN: 0022-4766; 1573-8779
• DOI: 10.1134/S002247661701019X

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 Ce1–xMxOy (M = Gd, La, Mg; x = 0-0.5; 1.5 ≤ y ≤ 2.0) for catalysts for the autothermal reforming of bioethanol to a hydrogen-bearing gas. It is shown that Ce1–xMxOy 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 Ce1–xMxOy 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 Ce1–xMxOy materials is found.