Intact and dissociative adsorption of water on Ru(0 0 0 1)
Water adsorption on Ru(0 0 0 1) has been examined to throw light on the controversy surrounding whether water adsorbs intact or as a partially dissociated overlayer. Below 140 K H 2O/D 2O adsorption produces overlayers which show vibrational spectra characteristic of an intact water bilayer. Above 1...
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| Published in | Chemical physics letters Vol. 388; no. 1; pp. 89 - 93 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
11.04.2004
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| Online Access | Get full text |
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| Summary: | Water adsorption on Ru(0
0
0
1) has been examined to throw light on the controversy surrounding whether water adsorbs intact or as a partially dissociated overlayer. Below 140 K H
2O/D
2O adsorption produces overlayers which show vibrational spectra characteristic of an intact water bilayer. Above 150 K H
2O dissociates to form a mixed (OH/H
2O/H) overlayer, suppressing the molecular H
2O stretching and scissors modes seen in RAIRS of water bilayers to leave only out of plane bending modes. Dissociation of H
2O to form the mixed overlayer competes with H
2O desorption and this branching can be enhanced or suppressed by pre-adsorbing O or H. |
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| ISSN: | 0009-2614 1873-4448 |
| DOI: | 10.1016/j.cplett.2004.02.076 |