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Water adsorption on O-covered Ru{0001}: coverage-dependent change from dissociation to molecular adsorption

Gladys, M. J., Mikkelsen, A., Andersen, J. N. and Held, G. (2005) Water adsorption on O-covered Ru{0001}: coverage-dependent change from dissociation to molecular adsorption. Chemical Physics Letters, 414 (4-6). pp. 311-315. ISSN 0009-2614

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To link to this article DOI: 10.1016/j.cplett.2005.08.077

Abstract/Summary

When water is coadsorbed with oxygen at coverages above 0.25ML an intact water species is observed in high resolution X-ray photoelectron spectroscopy up to 220 K, which is significantly more stable than intact water on the clean surface. The presence of this species causes a shift in the O 1s binding energy of the pre-adsorbed oxygen, which indicates the formation of hydrogen bonds between the two adsorbates. Low coverages of oxygen induce partial dissociation and recombinative desorption in the same temperature range, which illustrates that desorption temperatures alone cannot be used to determine whether water is molecularly intact or not.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:16625
Publisher:Elsevier

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