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

A. Kishimoto; T. Kudo; T. Nanba

doi:10.1016/0167-2738(92)90282-T

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

A. Kishimoto, T. Kudo, T. Nanba

School of Engineering

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

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 language	English
Pages (from-to)	993-997
Number of pages	5
Journal	Solid State Ionics
Volume	53-56
Issue number	PART 2
DOIs	https://doi.org/10.1016/0167-2738(92)90282-T
Publication status	Published - 1992

ASJC Scopus subject areas

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

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title = "Amorphous tantalum and niobium oxide proton conductors derived from respective peroxo polyacids",

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.",

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TY - JOUR

T1 - Amorphous tantalum and niobium oxide proton conductors derived from respective peroxo polyacids

AU - Kishimoto, A.

AU - Kudo, T.

AU - Nanba, T.

PY - 1992

Y1 - 1992

N2 - 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.

AB - 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.

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JO - Solid State Ionics

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IS - PART 2

ER -

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

Abstract

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