ISSN:
1572-879X
Keywords:
Co
;
Cu
;
single crystal
;
CH4
;
supersonic molecular beam
;
temperature-programmed desorption
;
modified reactivity
;
bimetallic systems
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The reactivity of Co deposited on Cu(111) is determined using the dissociation of CH4 as a test reaction. The CH4 molecules are produced in a supersonic molecular beam expansion and dissociate on Co but not on Cu under the experimental conditions used here. It is found that the dissociation probability of CH4 on a few layers of pseudomorphic Co adsorbed on noble Cu(111) is larger than that of pure Co. The apparent CO binding energy is, however, not shifted as measured using thermal desorption. A model of this surprising behavior is presented using information on the structure and theoretical calculations on the shift of the d-band of Co adsorbed on Cu(111).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1019042613853
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