Thermal desorption study of Ba and hydrogen coadsorption on Ni(110) surface
| dc.contributor.author | Vlachos, D. S. | en |
| dc.contributor.author | Papageorgopoulos, C. A. | en |
| dc.date.accessioned | 2015-11-24T18:29:15Z | |
| dc.date.available | 2015-11-24T18:29:15Z | |
| dc.identifier.issn | 0169-4332 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16239 | |
| dc.rights | Default Licence | - |
| dc.subject | Thermal desorption | en |
| dc.subject | Ba | en |
| dc.subject | Hydrogen | en |
| dc.subject | Ni(100) | en |
| dc.title | Thermal desorption study of Ba and hydrogen coadsorption on Ni(110) surface | en |
| heal.abstract | In this work, we study the coadsorption of barium (Ba) and hydrogen (H) on Ni(100) surfaces using mainly thermal desorption spectroscopy (TDS) in correlation with Auger electron spectroscopy (AES), low-energy electron diffraction (LEED) and work function (WF) measurements. Two different processes have been used for the coadsorption experiments: (1) Ba deposition on hydrogenated Ni(110) and (2) H adsorption on Ba-covered Ni(110). In both cases, H gives two different TD energy states, β1 and β2. The first state is the same with that of H adsorption on clean Ni(110), pointing to a direct H Ni bonding, while the second, which is attributed to a H Ba interaction, shifts to higher temperature as Ba-coverage increases up to ΘBa=0.9 ML. This shift indicates a gradually developing attractive H Ba interaction leading to BaH2 formation. The formation of BaH2 does not depend on the sequence of Ba and H deposition. For ΘBa?0.3 ML, H adsorption on Ba/Ni(110) does not induce any WF change, as H2 does on alkali-covered surfaces. This means that the Ba/Ni(110) surface might be a stable negative H ion source. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | http://dx.doi.org/10.1016/S0169-4332(98)00336-5 | - |
| heal.identifier.secondary | http://www.sciencedirect.com/science/article/pii/S0169433298003365 | - |
| heal.journalName | Applied Surface Science | en |
| heal.journalType | peer reviewed | - |
| heal.publicationDate | 1998 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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