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The effects of a potassium overlayer on the reaction pathway of CH2 and C2H5 on Rh(111) |
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| Authors: | Kiss J Barthos R Solymosi F |
| Affiliation: | (1) Institute of Solid State and Radiochemistry, The University of Szeged, and Reaction Kinetics Research Group of the Hungarian Academy of Sciences, PO Box 168, H-6701 Szeged, Hungary |
| Abstract: | The effect of potassium on the reaction pathways of adsorbed CH2 and C2H5 species on Rh(111) was investigated by means of reflection absorption infrared spectroscopy (RAIRS) and temperature programmed desorption (TDS). Hydrocarbon fragments were produced by thermal and photo-induced dissociation of the corresponding iodo compounds. Potassium adatoms markedly stabilized the adsorbed CH2 and converted it into C2H4, the formation of which was not observed for K-free Rh(111). New routes of the surface reactions of C2H5 have been also opened in the presence of potassium, namely its transformation into butane and butene. |
| Keywords: | stability of CH2 on Rh(111) effects of potassium on the reactions of CH2 coupling of CH2 into C2H4 stability of C2H5 on Rh(111) effects of potassium on the reactions of C2H5 formation of butane and butene from C2H5 |
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