Chemical composition and reactivity of water on hexagonal Pt-group metal surfaces
作者： A. Shavorskiy , M. J. Gladys , G. Held
DOI: 10.1039/B808235A
关键词: Valence (chemistry) 、 Analytical chemistry 、 X-ray photoelectron spectroscopy 、 Molecular orbital 、 Dissociation (chemistry) 、 Chemistry 、 Oxygen 、 Metal 、 Reactivity (chemistry) 、 Chemical composition
摘要: The dissociation behaviour and valence-electronic structure of water adsorbed on clean oxygen-covered Ru{0001}, Rh{111}, Pd{111}, Ir{111} Pt{111} surfaces has been studied by high-resolution X-ray photoelectron spectroscopy with the aim identifying similarities trends within Pt-group metals. On average, we find higher reactivity for 4d metals (Ru, Rh, Pd) as compared to 5d (Ir, Pt), which is correlated characteristic shifts in 1b1 3a1 molecular orbitals water. Small amounts oxygen ( 0.25 ML) only intact observed. Under UHV conditions these coverages can be reached metals, are, therefore, not passivated.
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