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Issue 16, 2016
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Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr1.90Ni0.71Cu0.24Ga0.05O4

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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.

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

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The article was received on 22 Nov 2015, accepted on 22 Mar 2016 and first published on 22 Mar 2016


Article type: Paper
DOI: 10.1039/C5CP07192E
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Citation: Phys. Chem. Chem. Phys., 2016,18, 11125-11131

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

    T. Ishihara, J. Hyodo, H. Schraknepper, K. Tominaga and S. Ida, Phys. Chem. Chem. Phys., 2016, 18, 11125
    DOI: 10.1039/C5CP07192E

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