Article ID Journal Published Year Pages File Type
1297634 Solid State Ionics 2011 6 Pages PDF
Abstract

The ion conductivity of a solid-state material is primarily a function of its chemical composition and crystal structure. However, interfaces can play an important role in the conduction process. The effects of interfaces on ionic properties can be controlled on the basis of “nanoionics”. In this study, we demonstrate a nanoionics phenomenon observed in a blue platinum-containing perovskite. The proton conductivity changed reversibly in response to the precipitation of platinum nanoparticles and oxidation to form a solid solution. The results of XAFS measurements, TEM analysis, and electron holography provide evidence of the nanoionics phenomenon, and suggest a possible underlying mechanism for the conductivity change caused by the small amount of precipitated platinum nanoparticles in the perovskite oxide.

Research Highlights► We report a reversible nanoionics effect in a platinum-containing blue perovskite. ► Conductivity changes in response to the formation of platinum nanoparticles. ► XAFS, TEM and electron holography results help understanding this phenomenon.

Related Topics
Physical Sciences and Engineering Chemistry Electrochemistry
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