Infra-red behaviour of sub-monolayer coverages of water on metal surfaces

• Published in: Surface science Vol. 307; pp. 60 - 64
• Main Authors: Griffiths, K., Kasza, R.V., Esposto, F.J., Callen, B.W., Bushby, S.J., Norton, P.R.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 20.04.1994; Amsterdam Elsevier Science; New York, NY
• Subjects: Applied sciences; Chemistry; Exact sciences and technology; General and physical chemistry; Metals. Metallurgy; Solid-gas interface; Surface physical chemistry; Inorganic adsorbate; Water; Substrate; Gas solid adsorption; Platinum; Gas solid interface; Metallic adsorbent; Aluminium; Nickel; Infrared spectrum; Experimental study; Absorption spectrum
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/0039-6028(94)90370-0

A comparison of the development of the H-bonded O-H stretch as a function of water coverage on three substrates leads us to the following conclusions: (1) On Ni(110), water can, under certain circumstances, adsorb monomerically. Very few other examples of monomeric adsorbed water have ever been reported. (2) On Pt(100)-(1 × 1) and -(hex) surfaces, clustering takes place very readily at low temperatures (130 K) and low coverages, and the tendency on both clean surface phases is to form a small number of large clusters. On a surface containing Si impurity, clusters are nucleated at the impurity sites initially and therefore tend to be smaller and more numerous. (3) On Al(100), a broad distribution of cluster sizes is evident, suggesting that molecules tend to have limited mobility after sticking to the surface.