Effect of dispersion of nanosize platinum particles on electrical conduction properties of proton-conducting oxide SrZr0.9Y 0.1O3-α

Hiroshige Matsumoto; Yoshihisa Furya; Sachio Okada; Takayoshi Tanji; Tatsumi Ishihara

doi:10.1149/1.2434202

Effect of dispersion of nanosize platinum particles on electrical conduction properties of proton-conducting oxide SrZr_0.9Y _0.1O_3-α

Hiroshige Matsumoto, Yoshihisa Furya, Sachio Okada, Takayoshi Tanji, Tatsumi Ishihara

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

20 Citations (Scopus)

Abstract

Nanosize effects have gradually become emphasized in the description of ion conduction properties of solids. The authors demonstrate a nanoionics effect that occurs in a proton-conducting perovskite upon dispersing fine platinum particles in the oxide. Both the ionic and hole conductivities are lost when the volume fraction of dispersed platinum exceeds a threshold value, resulting in an enormous reduction in both conductivities. These experimental results are discussed in accordance with a percolation model: the boundary layer, where charge carriers are suppressed by a space charge layer effect, blocks the bulk conduction of both protonic and electron-hole charge carriers.

Original language	English
Journal	Electrochemical and Solid-State Letters
Volume	10
Issue number	4
DOIs	https://doi.org/10.1149/1.2434202
Publication status	Published - Feb 19 2007

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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10.1149/1.2434202

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AU - Matsumoto, Hiroshige

AU - Furya, Yoshihisa

AU - Okada, Sachio

AU - Tanji, Takayoshi

AU - Ishihara, Tatsumi

PY - 2007/2/19

Y1 - 2007/2/19

N2 - Nanosize effects have gradually become emphasized in the description of ion conduction properties of solids. The authors demonstrate a nanoionics effect that occurs in a proton-conducting perovskite upon dispersing fine platinum particles in the oxide. Both the ionic and hole conductivities are lost when the volume fraction of dispersed platinum exceeds a threshold value, resulting in an enormous reduction in both conductivities. These experimental results are discussed in accordance with a percolation model: the boundary layer, where charge carriers are suppressed by a space charge layer effect, blocks the bulk conduction of both protonic and electron-hole charge carriers.

AB - Nanosize effects have gradually become emphasized in the description of ion conduction properties of solids. The authors demonstrate a nanoionics effect that occurs in a proton-conducting perovskite upon dispersing fine platinum particles in the oxide. Both the ionic and hole conductivities are lost when the volume fraction of dispersed platinum exceeds a threshold value, resulting in an enormous reduction in both conductivities. These experimental results are discussed in accordance with a percolation model: the boundary layer, where charge carriers are suppressed by a space charge layer effect, blocks the bulk conduction of both protonic and electron-hole charge carriers.

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Effect of dispersion of nanosize platinum particles on electrical conduction properties of proton-conducting oxide SrZr_0.9Y _0.1O_3-α

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