Identification of surface vibrations on clean and oxygen covered Pt(111) surfaces with high resolution electron energy loss spectroscopy (EELS) |
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Authors: | JA Schaefer W Göpel |
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Institution: | Physics Department, Montana State University, Bozeman, MT 59717 USA |
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Abstract: | Clean and oxygen covered {111} recrystallized Pt surfaces were studied by EELS after surface preparation at 150≤T≤165OK. The clean surface shows Stokes as well as anti-Stokes lines of surface phonons at ±195?1. Adsorption of small amounts of (<10?2 monolayers) of O2 or H2 leads to substrate-derived phonon losses at ±380cm?1. Oxygen exposure at different pressures, times and temperatures leads to atomic and/or molecular adsorption as well as oxide-related features which have been identified by EELS. |
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