Influence of the transition-metal doping on conductivity of a BaCeO 3-based protonic conductor

Tetsuo Shimura, Hiroomi Tanaka, Hiroshige Matsumoto, Toshinobu Yogo

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56 Citations (Scopus)

Abstract

The effect of transition metal (Mn, Fe and Co) doping to the Ce-site of the perovskite-type protonic conductor BaCe0.90Y0.10O 3-δ was examined. Single-phase samples of BaCe 0.90-xY0.10MxO3-δ were obtained at 0 ≤ x ≤ 0.10 for M = Mn and Co and at 0 ≤ x ≤ 0.075 for M = Fe. The conductivity of the samples in air decreased with transition-metal doping. Among the doped samples, Mn-doped solutions showed the lowest conductivity and the highest activation energy of conduction. The conductivity of these samples was independent of the concentration of the transition metals (x). This behavior of the conductivity could be explained by supposing the generation of the impurity state by transition-metal doping inside the band gap. In hydrogen, samples showed ionic conduction. The influence of transition-metal doping on the conduction behavior in hydrogen is small.

Original languageEnglish
Pages (from-to)2945-2950
Number of pages6
JournalSolid State Ionics
Volume176
Issue number39-40
DOIs
Publication statusPublished - Dec 1 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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