Surface electrochemistry of oxides: Thermodynamic and model approaches

✍ Scribed by O.A. Petrii

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 620 KB
• Volume: 41
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(96)00060-6

✦ Synopsis

Surface phenomena

on the oxide-with-metallic conductivity/electrolyte-solution interface are considered.

In the simplest case they are governed both by the solution pH and the ratio of metal components in different valency states (oxide stoichiometry) in the solid phase. For such oxides, the electrocapillary curve can be transformed into the electrocapillary surface in the space of three or more dimensions.

Model approaches must take this into account and explain the existence of the inversed potential of zero free charge (pzfc) (at constant pH), the invariance of charge-pH curves for certain oxides, the peculiarity of Parsons-Zobel dependences, and the "super-Nernstian" behaviour of oxides.