SCATTERING OF SWIFT MOLECULES, H-2 AND CO2, FROM METAL-SURFACES

Autor(en): SCHMIDT, K
FRANKE, H
SCHLATHOLTER, T
HOFNER, C
NARMANN, A
HEILAND, W
Stichwörter: ADSORPTION; CHARGE-EXCHANGE; CHEMISORPTION; Chemistry; Chemistry, Physical; DEPENDENCE; DESORPTION; DISSOCIATIVE SCATTERING; HYDROGEN IONS; NI(110); PARTICLES; PD(100) SURFACE; Physics; Physics, Condensed Matter
Erscheinungsdatum: 1994
Herausgeber: ELSEVIER SCIENCE BV
Journal: SURFACE SCIENCE
Volumen: 301
Ausgabe: 1-3
Startseite: 326
Seitenende: 336
Zusammenfassung: 
Molecular ions and neutral molecules are scattered at 500 eV and at grazing incidence from metal surfaces. H-2(+) and CO2+ are subject to charge exchange processes which lead in part to dissociation. In the case of CO2+ evidence for negative molecular ion formation is found. When using neutral H-2 and CO2 only in the case of CO2 is charge capture observed, i.e. negative ions are found. Potassium `'poisons'' the dissociation of H-2, on Pd. These findings are supported by comparison of different metals, Ni(110), Pd(110) and Pd(110) covered with a monolayer of K. The dissociation probability of H-2(+) and H-2(0) decrease at the K-covered surface, in the cases of CO2+ and CO20 an increase is found. CO2+ on Pd(110) K dissociates completely.
ISSN: 00396028
DOI: 10.1016/0039-6028(94)91312-9

Show full item record

Google ScholarTM

Check

Altmetric