How reactive are perovskite ruthenate oxide surfaces?

Abstract> Perovskite oxides are promising materials in applications ranging from solid oxide fuel cells to catalysts, yet their surface chemistry is surprisingly poorly understood at the atomic level. The present talk will discuss recent results of combined theoretical - density functional theory (DFT) - and experimental - mostly low-temperature scanning tunnelling microscopy (STM) – studies on ruthenate surfaces and focus on:
• High chemical activity: CO on Sr3Ru2O7(001) (SRO)
• Dissociated but not separated: H2O on SRO
• Break the surface symmetry: Ordered hydroxyls on Ca3Ru2O7(001) (CRO)
• Activate O2 molecules: Charged superoxide O2- on CRO