XRD, PDF, AND EXAFS STUDY OF THE PHASE COMPOSITION AND LOCAL STRUCTURE OF SUPPORTED RUTHENIUM-CESIUM CATALYSTS

Supported catalysts Ru/MgO, Ru–Cs + /MgO, Ru/γ-Al 2 O 3 , and Ru–Cs + /γ-Al 2 O 3 are prepared by the impregnation method using RuOHCl 3 and Cs 2 CO 3 as precursor compounds, reduced in hydrogen at 450 °C, and characterized by XRD, PDF, and EXAFS. The phase composition and local structure of the act...

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Veröffentlicht in:	Journal of structural chemistry 2021-04, Vol.62 (4), p.545-554
Hauptverfasser:	Moroz, E. M., Pakharukova, V. P., Kriventsov, V. V., Larichev, Yu. V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminates Aluminum oxide Atomic Atomic/Molecular Structure and Spectra Catalysts Cesium Cesium ions Cesium oxides Chemical synthesis Chemistry Chemistry and Materials Science Inorganic Chemistry Magnesium oxide Molecular Optical and Plasma Physics Phase composition Physical Chemistry Ruthenium Solid solutions Solid State Physics Transitional aluminas
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Beschreibung
Zusammenfassung:	Supported catalysts Ru/MgO, Ru–Cs + /MgO, Ru/γ-Al 2 O 3 , and Ru–Cs + /γ-Al 2 O 3 are prepared by the impregnation method using RuOHCl 3 and Cs 2 CO 3 as precursor compounds, reduced in hydrogen at 450 °C, and characterized by XRD, PDF, and EXAFS. The phase composition and local structure of the active component are determined. In the case of MgO support, the structure of the cesium promoter corresponds to cesium oxides. In the case of γ-Al 2 O 3 supported catalysts, ruthenium and cesium ions interact during the synthesis to form aluminates and solid solutions in the support structure.
ISSN:	0022-4766 1573-8779
DOI:	10.1134/S0022476621040053