Formation of metal clusters in alkaline-earth-cation-exchanged x zeolites
- Univ. of Houston, TX (United States)
Alkaline-earth-cation-exchanged X zeolites were reacted with sodium metal vapor and studied by electron spin resonance (ESR), diffuse reflectance (DR), and far-infrared (far-IR) spectroscopies. The ESR results show that alkaline-earth-metal clusters formed inside the zeolites. The temperature dependence of the ESR intensity indicated that the cluster size is constrained by the zeolite so that there is a quantum size effect on the small alkaline-earth metal clusters formed. The DR spectra show colors consistent with discrete energy levels and a quantum size effect. Electron transfer from sodium atoms to exchanged cations in the zeolites is also indicated by far-IR data for Mg-X and Ba-X zeolites. 14 refs., 17 figs., 3 tabs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 232255
- Journal Information:
- Journal of Physical Chemistry, Vol. 96, Issue 9; Other Information: PBD: 30 Apr 1992
- Country of Publication:
- United States
- Language:
- English
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