How Is Oxygen Incorporated into Oxides?A Comprehensive Kinetic Study of a Simple Solid-State Reaction with SrTiO3 as a Model Material

摘要

The kinetics of stoichiometry change of an oxide-a prototype of a simple solid-state reaction and a process of substantial technological relevance-is studied and analyzed in great detail.Oxygen incorporation into strontium titanate was chosen as a model process.The complete reaction can be phenomenologically and mechanistically understood beginning with the surface reaction and ending with the transport in the perovskite.Key elements are a detailed knowledge of the defect chemistry of the perovskite as well as the application of a variety of experimental and theoretical tools,many of them evolving from this study.The importance of the reaction and transport steps for (electro)chemical applications is emphasized.