ADSORPTION AND DECOMPOSITION OF ETO ON CL-MODIFIED AG(111) AT LOW-TEMPERATURES

The adsorption and decomposition of ethylene oxide (EtO) on Cl-modifie d and oxygen-precovered Ag(111) at low temperatures with high resoluti on electron energy loss spectroscopy (HREELS) are studied. At 140 K, E tO is molecularly adsorbed on the surface. At above 230 K, with atomic oxygen on the surface, a small amount of EtO decomposes into ethylene and is oxidized to produce some oxidation products as water, etc. whi le with dioxygen on the surface, a large amount of EtO decomposes into ethylene and is oxidized to produce large amounts of oxidation produc ts like water and so on. The experimental results showed that chlorine can, on the one hand, decrease the adsorption amount of Et() and, on the other hand, inhibit the further oxidation of EtO.