Accessibility navigation


Chemical composition and reactivity of water on hexagonal Pt-group metal surfaces

Shavorskiy, A., Gladys, M.J. and Held, G. (2008) Chemical composition and reactivity of water on hexagonal Pt-group metal surfaces. Physical Chemistry Chemical Physics, 10 (40). pp. 6150-6159. ISSN 1463-9076

Full text not archived in this repository.

To link to this article DOI: 10.1039/b808235a

Abstract/Summary

The dissociation behaviour and valence-electronic structure of water adsorbed on clean and oxygen-covered Ru{0001}, Rh{111}, Pd{111}, Ir{111} and Pt{111} surfaces has been studied by high-resolution X-ray photoelectron spectroscopy with the aim of identifying similarities and trends within the Pt-group metals. On average, we find higher reactivity for the 4d metals (Ru, Rh, Pd) as compared to 5d (Ir, Pt), which is correlated with characteristic shifts in the 1b(1) and 3a(1) molecular orbitals of water. Small amounts of oxygen (<0.2 ML) induce dissociation of water on all five surfaces, for higher coverages (>0.25 ML) only intact water is observed. Under UHV conditions these higher coverages can only be reached on the 4d metals, the 5d metals are, therefore, not passivated.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11614
Uncontrolled Keywords:STRUCTURAL-PROPERTIES, PARTIAL DISSOCIATION, CARBON-MONOXIDE, ADSORPTION, PT(111), RU(001), OXYGEN, PD(111), RH(111), H2O

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation