Abstract
We have studied the interaction of NO with the reconstructed Au(1 0 0) surface. Using variable temperature scanning tunneling microscopy we have observed formation of the unreconstructed phase of Au(1 0 0) after NO exposure. This NO adsorption-induced phase transition is observed only in a window of temperatures around 170 K, which suggests that this process is slightly activated. Under the same conditions, CO and O 2 cannot drive the phase transition, indicating weaker interaction. Thermal desorption spectroscopy experiments provide an estimate of the strength of NO chemisorption on Au(1 0 0) of 57 ± 4 kJ mol −1.
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