NDLI: Engineering microstructure and redox properties in the mixed conductor $Ce_{0.9}Pr_{0.1}O

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Solís, Cecilia Balaguer, María Serra, José M. Roitsch, Stefan
Description	Author Affiliation: Balaguer M ( Instituto de Tecnología Química (Universidad Politécnica de Valencia - Consejo Superior de Investigaciones Científicas), Av. Naranjos s/n, E-46022 Valencia, Spain. jmserra@itq.upv.es.)
Abstract	10% Praseodymium doped ceria exhibits a combination of mixed ionic and electronic conductivity, redox catalytic properties and chemical compatibility with water and carbon dioxide at high temperatures. Minor additions of cobalt oxide have been demonstrated to act as a sintering aid as well as an effective promoter of the electronic conduction. However, an excess of sintering temperature causes cobalt aggregation into the grain boundaries as inferred from FE-SEM/EDX and TEM analysis. The redox behaviour of the materials was studied by means of temperature programmed desorption (TPD) and reduction (TPR). This work shows the systematic study of sintering conditions in order to understand the evolution of the material microstructure, grain boundaries and the role of cobalt in this complex system. The final purpose of the work is to improve both electronic and oxygen ion transport properties for their potential application as oxygen-transport membranes and solid oxide fuel cell components. The sample sintered at 1000 °C exhibited the highest total conductivity at high temperatures, which is principally related to the improvement in the electronic conductivity through the grain boundary network.
ISSN	14779226
Issue Number	11
Journal	Dalton Trans.
Volume Number	43
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2014-03-21
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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