The IR spectra of CO adsorbed on silica-supported Ru in highly dispersed and sintered form have been measured and compared with the spectra obtained on flat and stepped faces of single crystals. Sintered Ru particles show hexagonal shape with predominance of the {001} facelets: this fact explains the similarity between the spectrum of CO adsorbed on them and on {001} single crystal faces. Due to the presence of well shape crystallites, sintered samples are suitable for spectroscopic investigations concerning adsorbate-adsorbate interactions of dynamic and static type. The separation between the dynamic and static contributions has been made by using isotopic 12CO 13CO mixtures.
An IR investigation of CO chemisorbed on ruthenium microcrystals supported on silica.
SPOTO, Giuseppe;ZECCHINA, Adriano
1985-01-01
Abstract
The IR spectra of CO adsorbed on silica-supported Ru in highly dispersed and sintered form have been measured and compared with the spectra obtained on flat and stepped faces of single crystals. Sintered Ru particles show hexagonal shape with predominance of the {001} facelets: this fact explains the similarity between the spectrum of CO adsorbed on them and on {001} single crystal faces. Due to the presence of well shape crystallites, sintered samples are suitable for spectroscopic investigations concerning adsorbate-adsorbate interactions of dynamic and static type. The separation between the dynamic and static contributions has been made by using isotopic 12CO 13CO mixtures.
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