High-valence osmium ions (OS'+ or 0s" ) were stabilized on CeOz and Th02, when the initially impregnated cluster OSCAR was decomposed under oxidizing conditions. This is in contrast to the formation of low-valence ions (OS'+ and 0~~') on Al,03. The presence of osmium on Ce02 and Th02 presumably modi
Quantitative FTIR studies of the Ru3(CO)12 cluster supported on hydrated alumina
✍ Scribed by S. Dobos; I. Böszörményl; V. Silberer; L. Guczi; J. Mink
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 241 KB
- Volume
- 96
- Category
- Article
- ISSN
- 0020-1693
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✦ Synopsis
Recently there has been growing interest in the interaction of carbonyl clusters with oxidic surfaces. Because of its simple structure and well-known chemical behaviour, Rua(CO)iZ has been studied by several authors [l-4].
Qualitative examination of the IR spectra suggests that, depending on the circumstances, Rua(C0)i2 adsorbed on hydrated A1203 decomposes into three structures, for which the band pairs at about 2140-2070, 2070-2000 and 2050-1970 cm-', respectively, are characteristic. The interpretations of these band pairs are rather different [l-4].
In the present investigation FTIR spectroscopy and data analysis have been carried out on the Rus(CO)iZ/A120s system, in order to prove or disprove the existence of the above three structures.
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The interaction of CO, H, NHg, CH,OH, H20, and C\*H,, with ultrathin Cu films supported on Ru (000 1) has been studied by means of XPS and TPD. For films with O,,< I, adsorption ofC0, &X4, and H induced shifts of +0.5, +0.3, and +0.25 eV, respectively, in the Cu(2p,,,) peak position. Negligible shif