Protonic and electronic conductivity of the layered perovskite oxides HCa2Nb3O10 and Ca4Nb 6O19

Thomas I. Draskovic, Tsinghai Wang, Camden N. Henderson, Thomas E. Mallouk

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The structural and electrical properties of the Dion-Jacobson series layer perovskite HCa2Nb3O10 were investigated. Within the intermediate temperature range (200-475 C), the compound undergoes topochemical dehydration to Ca4Nb6O19 and, under reducing atmospheres, partial reduction of Nb(V) to Nb(IV). These changes occur upon heating and are not reversed on cooling. Analysis of impedance data shows that the conductivity of Ca4Nb6O19 is predominantly electronic under reducing atmospheres, consistent with the behavior of other structurally related mixed-valence layered niobates.

Original languageEnglish (US)
Pages (from-to)4576-4580
Number of pages5
JournalInternational Journal of Hydrogen Energy
Issue number9
StatePublished - Mar 18 2014

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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