Abstract
We have measured directly the absolute surface coverage of ethylene adsorbed to saturation on a clean Pt(111) surface at 100 K. The fully deuterated compound (C 2D 4) was substituted for C 2H 4, enabling quantitative measurements to be made of both C and D areal densities via two independent nuclear reactions. For the C atom coverage, we have measured the 12C(d, p) 13C yield for incident deuterons of 972 keV energy. For the D atom coverage, we have measured the D( 3He, p) 4He yield for incident 3He ions of 630 keV energy. Measurements were made in conjunction with LEED (at 300 K), Auger and thermal desorption spectroscopies. For ethylene adsorption at 100 K, the saturation carbon and deuterium coverages are consistent with C 2D 4 stoichiometry and the observed coverage was 0.23 ± 0.02 monolayers. The coverage for adsorption at 300 K, assuming C 2D 3 stoichiometry, was measured to be 0.21 ± 0.02 monolayers.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.