Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr1.90Ni0.71Cu0.24Ga0.05O4

T. Ishihara; J. Hyodo; H. Schraknepper; K. Tominaga; S. Ida

doi:10.1039/c5cp07192e

Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr_1.90Ni_0.71Cu_0.24Ga_0.05O₄

T. Ishihara, J. Hyodo, H. Schraknepper, K. Tominaga, S. Ida

Kyushu University Platform of Inter/Transdisciplinary Energy Research

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

2 Citations (Scopus)

Abstract

The effects of dispersing Pt particles in bulk Pr_1.90Ni_0.71Cu_0.21Ga_0.05O_4+δ (PNCG) on the electrical conductivity and oxygen permeability of the material were studied. The different thermal expansion coefficients of PNCG and Pt generated a mechanical compressive strain in the PNCG. This may cause the electrical conductivity to decrease in samples containing Pt. In contrast, the oxide ion conductivity estimated from the oxygen permeability increased upon dispersion of Pt. These variations appear to be related to the electron hole and interstitial oxygen concentrations. Moreover, the present study suggests that the mechanical strain induces a chemical strain via the introduction of oxygen defects as well as changes in cation valences.

Original language	English
Pages (from-to)	11125-11131
Number of pages	7
Journal	Physical Chemistry Chemical Physics
Volume	18
Issue number	16
DOIs	https://doi.org/10.1039/c5cp07192e
Publication status	Published - 2016

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr1.90Ni0.71Cu0.24Ga0.05O4",

abstract = "The effects of dispersing Pt particles in bulk Pr1.90Ni0.71Cu0.21Ga0.05O4+δ (PNCG) on the electrical conductivity and oxygen permeability of the material were studied. The different thermal expansion coefficients of PNCG and Pt generated a mechanical compressive strain in the PNCG. This may cause the electrical conductivity to decrease in samples containing Pt. In contrast, the oxide ion conductivity estimated from the oxygen permeability increased upon dispersion of Pt. These variations appear to be related to the electron hole and interstitial oxygen concentrations. Moreover, the present study suggests that the mechanical strain induces a chemical strain via the introduction of oxygen defects as well as changes in cation valences.",

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T1 - Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr1.90Ni0.71Cu0.24Ga0.05O4

AU - Ishihara, T.

AU - Hyodo, J.

AU - Schraknepper, H.

AU - Tominaga, K.

AU - Ida, S.

PY - 2016

Y1 - 2016

N2 - The effects of dispersing Pt particles in bulk Pr1.90Ni0.71Cu0.21Ga0.05O4+δ (PNCG) on the electrical conductivity and oxygen permeability of the material were studied. The different thermal expansion coefficients of PNCG and Pt generated a mechanical compressive strain in the PNCG. This may cause the electrical conductivity to decrease in samples containing Pt. In contrast, the oxide ion conductivity estimated from the oxygen permeability increased upon dispersion of Pt. These variations appear to be related to the electron hole and interstitial oxygen concentrations. Moreover, the present study suggests that the mechanical strain induces a chemical strain via the introduction of oxygen defects as well as changes in cation valences.

AB - The effects of dispersing Pt particles in bulk Pr1.90Ni0.71Cu0.21Ga0.05O4+δ (PNCG) on the electrical conductivity and oxygen permeability of the material were studied. The different thermal expansion coefficients of PNCG and Pt generated a mechanical compressive strain in the PNCG. This may cause the electrical conductivity to decrease in samples containing Pt. In contrast, the oxide ion conductivity estimated from the oxygen permeability increased upon dispersion of Pt. These variations appear to be related to the electron hole and interstitial oxygen concentrations. Moreover, the present study suggests that the mechanical strain induces a chemical strain via the introduction of oxygen defects as well as changes in cation valences.

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Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr_1.90Ni_0.71Cu_0.24Ga_0.05O₄

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