Abstract
The interaction of water with the reconstructed Ir(110)-(1 × 2) surface has been studied with LLED, CPD, XPS and thermal desorption mass spectrometry. It is shown that at most. 6% of the adsorbed water dissociates upon adsorption at a temperature of 130 K. Water does dissociate to OH groups when adsorbed on an Ir(110)−(1 × 2) surface with preadsorbed oxygen, Water exhibits a constant sticking coefficient for all submonolayer coverages. There exist four distinct thermal desorption states of water on the clean Ir(110)−(1 × 2) surface. A qualitative model is put forth to rationalize the complex thermal desorption behavior.
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