Surface kinetics of oxygen incorporation into SrTiO3

Effective surface rate constants for oxygen incorporation have been determined for single-crystal Fe-doped SrTiO3 from chemical relaxation experiments, by in situ, spatially resolved optical absorption spectroscopy, and from tracer exchange experiments, by subsequent secondary ion mass spectrometry analysis. Experiments were carried out as a function of temperature, oxygen partial pressure, and dopant concentration. The effect of various metal films (Pt, Ag, Cr) and metal oxide films (YBa2Cu3O7-delta and La0.8Sr0.2CoO3-delta) on the surface reaction kinetics was also investigated. The implications of the results with regard to the mechanisms of chemical and tracer incorporation into SrTiO3 are discussed. (C) 2002 The Electrochemical Society.