Alkali-support interactions on rubidium base catalysts determined by XANES, EXAFS, CO{sub 2} adsorption, and IR spectroscopy
- Univ. of Virginia, Charlottesville, VA (United States)
Rubidium was supported on a variety of catalyst supports, including magnesia, titania, alumina, carbon, and silica. Except for Rb/MgO, none of the oxide-based samples contained surface carbonates as detected by IR spectroscopy after pretreatment at 773 K. The XANES and EXAFS associated with the Rb K edge indicated that the local structure around Rb was highly dependent on the support composition. Results from CO{sub 2} stepwise TPD showed that Rb/MgO possessed strongly basic sites that were not present on pure MgO. The basic sites formed by Rb addition to the other supports were weaker than those on Rb/MgO. Decomposition of 2-propanol at 593 K was used to relate catalytic activity to surface basicity. 40 refs., 16 figs., 4 tabs.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 589394
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 169; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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