Uso del óxido de cerio dopado con praseodimio en SOFC

Abstract

The relatively open, fluorite type crystalline structure which presents cerium dioxide, gives the material unique structural, morphological, magnetic and electrical properties, which make it of great interest to be used in the design of components for solid oxide fuel cells (SOFC). These properties are enhanced when CeO₂ is modified in various proportions the cations Ce by elements possessing oxidation states similar to this. One of the elements that presents this characteristic is praseodymium, which presents two stable oxidation states Pr³⁺ and Pr⁴⁺, and replacing these cations in the cubic structure of cerium dioxide, oxygen vacancies increase due to the interconversion of their oxidation states, causing the ionic and electronic conductivity to grow considerably, making these materials more interesting to be applied in this type of technology.