Alcohol chemistry as a probe of mixed-metal phases: Reactions of 2-propanol on cobalt-covered Mo(110)
- Harvard Univ., Cambridge, MA (United States)
The reactions of 2-propanol on cobalt-covered Mo(110) have been investigated in an effort to test for special reactivity associated with mixed Co-Mo phases. 2-Propanol reacts via 2-propoxide on a continuous Co overlayer supported on Mo(110), as shown by X-ray photoelectron and infrared spectroscopies. Carbon monoxide, acetone, propene, and hydrogen are the only gaseous products, while carbon and oxygen remain on this surface after temperature-programmed reaction up to 760 K. The acetone and CO production increase whereas propene and propane production decrease as the Co coverage is increased from 0 to 1.5 monolayers (ML). This is consistent with independent reactions occurring on both Co and Mo, since 2-propanol in known to produce propene and propane on Mo(110). The C-O bond retention products (acetone and CO) are attributed to reaction on the Co overlayer. The observed C-O bond retention on Co is consistent with the intermediate strength of the Co-O bond compared to other M-O bonds for transition metals. There is no evidence for aggregation of the Co overlayer induced by 2-propoxide, and therefore the observed reactivity is that of the dispersed Co overlayer. 71 refs., 7 figs.
- DOE Contract Number:
- FG02-84ER13289
- OSTI ID:
- 420708
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 44 Vol. 100; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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