Amorphous tantalum and niobium oxide proton conductors derived from respective peroxo polyacids

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Abstract

Tantalum and niobium based amorphous solids were prepared by drying respective peroxo polyacids. Peroxo-polytantalate (Ta-IPA) was obtained by a direct reaction of Ta(OC2H5)5 with H2O2, and its Nb-analogue (Nb-IPA) was synthesized by dissolving metallic Nb in H2O2. Niobium carbide also gave a pale yellow solution (Nb-IPA) with H2O2, which had carbon incorporated as a hetero atom. Alternating current electrical conductivity measurements were carried out with pellet samples. Each specimen showed similar temperature dependency indicating its proton conductive mechanism was the same. The conductivity of Ta-IPA solid was larger than those of the others (e.g. 3.9×10-6 S cm-1, 27°C). Conduction mechanisms are discussed i relation to the water content and the structure of these materials.

Original languageEnglish
Pages (from-to)993-997
Number of pages5
JournalSolid State Ionics
Volume53-56
Issue numberPART 2
DOIs
Publication statusPublished - 1992

Fingerprint

Niobium oxide
Tantalum oxides
niobium oxides
tantalum oxides
Niobium
Protons
conductors
niobium carbides
Tantalum
protons
tantalum
pellets
niobium
Water content
drying
moisture content
Carbides
alternating current
Drying
dissolving

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Amorphous tantalum and niobium oxide proton conductors derived from respective peroxo polyacids. / Kishimoto, Akira; Kudo, T.; Nanba, Tokuro.

In: Solid State Ionics, Vol. 53-56, No. PART 2, 1992, p. 993-997.

Research output: Contribution to journalArticle

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