Tin-antimony oxides of the type SnJb,O2 (x = 0.01-0.10) when calcined at 873K form solid solutions in which the Miissbauer parameters steadily depart from those of stannic oxide but provide no evidence for the formation of localised tin(U). Esr measurements indicate the presence of a spin free surfa
Tin-119 Mössbauer investigations of mixed oxide catalysts
✍ Scribed by Frank J. Berry
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 265 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0020-1693
No coin nor oath required. For personal study only.
✦ Synopsis
Tin-119 Miissbuuer spectra show that the cationic oxidation states and crystal structures of some mived oxide catalysts remain unaltered by the adsorption of acidic or basic molecules. Reaction of the oxides with either hydrogen or butenes gives reduced catalysts in which the retention of the tin atom with an oxidation state of (IV) is accompanied by an attenuation of the electric field gradient at the tin nuclei. The results are related to the catalytic properties of these materials.
📜 SIMILAR VOLUMES
Mössbauer spectroscopy measurements were made to observe alloy formation and interaction of tin with the alumina support in two \(\mathrm{Pt}-\mathrm{Sn} /\) alumina catalysts. The catalysts were rich in tin with an atomic ratio of \(\mathrm{Pt}: \mathrm{Sn}=0.7: 1\). One was prepared by coimpregnat
This paper reports the results of 119 Sn Mo ¨ssbauer Spectroscopy of residues from the pyrolysis of Sn 3 O 3 Bu 6 (1) and Sn 4 O 6 Bu 4 (2) (Bu ¼ n-butyl) in air, O 2 , and N 2 . The isomer shift and quadrupole splitting parameters of the samples allowed the identification of the tin oxidation state