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Water incorporation studies on doped barium cerate perovskites

Research output: Contribution to journalArticle

Author(s)

A Kruth, J T S Irvine

School/Research organisations

Abstract

BaCeO3-based perovskites exhibit high proton conductivities and are attractive candidates for application in electrocatalysis and fuel cells. In BaCe1-xYxO3-x/2, 0 less than or equal to x less than or equal to 0.15, the degree of hydration is directly related to the oxygen vacancy concentration and increases linearly with dopant content, x. The water content of the material depends predominantly on the number of oxygen vacancies. At maximum hydration, ca. 80% of oxygen vacancies are filled. The loss of water is primarily dependent upon temperature, with water loss occurring over a range of similar to200 degreesC. Samples with higher oxygen vacancy contents retain more water at high temperatures, and hence probably also have higher proton transport numbers at high temperatures. Under reducing conditions, water loss is accompanied by oxygen loss. (C) 2003 Elsevier B.V. All rights reserved.

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Details

Original languageEnglish
Pages (from-to)83-91
Number of pages9
JournalSolid State Ionics
Volume162-163
Issue numberSp. Iss. S1
DOIs
Publication statusPublished - 2003

    Research areas

  • water incorporation, barium cerate, perovskites, HIGH-TEMPERATURE, OXIDES, NONSTOICHIOMETRY, CONDUCTORS, OCTAHEDRA, MOBILITY

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