Elsevier

Surface Science

Volumes 211–212, 1 April 1989, Pages 1097-1105
Surface Science

A study of ruthenium catalysts on oxide supports

https://doi.org/10.1016/0039-6028(89)90880-7Get rights and content

Abstract

Ruthenium clusters on γ-Al2O3 and SiO2 supports, prepared by different impregnation methods, are studies by thermal programmed reduction (TPR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and chemisorption techniques. Significant differences between Ru/γ-Al2O3 and Ru/SiO2 systems are noticed in TPR and XPS spectra. Both these measurements indicate that Ru on the alumina substrate is present in two different chemical states, whereas on silica it shows the metallic state only. These observations confirm previous results that exhibit a strong metal-support interaction in the Ru/γ-Al2O3 system. This may be a starting point to understand the different catalytic behaviour of Ru/ γAl2O3 systems versus Ru/SiO2 systems in the CO hydrogenation process.

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