Abstract

During the room temperature decomposition of hydrazine on a polycrystalline iridium foil, a number of surface adsorbates are formed. Temperature programmed desorption spectroscopy reveals that these adspecies include several distinct states of hydrogen and of nitrogen adatoms, in addition to a surface free radical that leads to ammonia by reaction with hydrogen adatoms. The relative population densities of the surface species change with increasing exposure to hydrazine. The initially high catalytic activity of the surface is affected by the surface density of nitrogen adatoms in the strongly bound β-state.

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