Mixed conductivity, nonstoichiometric oxygen, and oxygen permeation properties in Co-doped Sr3Ti2O7-δ

Sirikanda Nuansaeng, Masatomo Yashima, Maki Matsuka, Tatsumi Ishihara

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Electrical conductivity and oxygen permeation rates in Co-doped Sr 3Ti2O7-δ with Ruddesden-Popper type structures were investigated. The effects of metal dopants (M) in the Ti site of Sr3Ti2(M)O7-δ on the mixed conductivity were also studied. Doping of Sr3Ti2O7-δ with Co was found to be effective for improving the electrical conductivity as well as the oxygen permeation rate, which could be assigned to the increased oxygen vacancy concentration by doping Co3+ into Ti4+ sites. The nonstoichiometric oxygen of these oxides was measured by using a thermal gravimetric method. The creation of oxygen vacancies, which is compensated with Co3+ doping, leads to higher oxide ion conductivity. The oxygen permeation rate monotonously increased with increasing amounts of Co in the Ti site. Sr3Ti0.8Co1.2O 7-δ exhibited high oxide ion conductivity and a large oxygen permeation rate. The highest oxygen permeation rate achieved a value of 2.02 cc min-1 cm-2 at 1273 K for Sr3Ti 0.8Co1.2O7-δ. Neutron diffraction analysis and redox titration suggests that the oxygen diffusion occurs through oxygen vacancies in the perovskite block, but not through excess oxygen in the rock salt block.

Original languageEnglish
Pages (from-to)11324-11331
Number of pages8
JournalChemistry - A European Journal
Volume17
Issue number40
DOIs
Publication statusPublished - Sep 26 2011

Fingerprint

Permeation
Oxygen
Oxygen vacancies
Doping (additives)
Oxides
Ions
Neutron diffraction
Titration
Perovskite
Salts
Metals
Rocks

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

Cite this

Mixed conductivity, nonstoichiometric oxygen, and oxygen permeation properties in Co-doped Sr3Ti2O7-δ. / Nuansaeng, Sirikanda; Yashima, Masatomo; Matsuka, Maki; Ishihara, Tatsumi.

In: Chemistry - A European Journal, Vol. 17, No. 40, 26.09.2011, p. 11324-11331.

Research output: Contribution to journalArticle

Nuansaeng, Sirikanda ; Yashima, Masatomo ; Matsuka, Maki ; Ishihara, Tatsumi. / Mixed conductivity, nonstoichiometric oxygen, and oxygen permeation properties in Co-doped Sr3Ti2O7-δ. In: Chemistry - A European Journal. 2011 ; Vol. 17, No. 40. pp. 11324-11331.
@article{0d8c0a275a9b43bbbd445d04c03af978,
title = "Mixed conductivity, nonstoichiometric oxygen, and oxygen permeation properties in Co-doped Sr3Ti2O7-δ",
abstract = "Electrical conductivity and oxygen permeation rates in Co-doped Sr 3Ti2O7-δ with Ruddesden-Popper type structures were investigated. The effects of metal dopants (M) in the Ti site of Sr3Ti2(M)O7-δ on the mixed conductivity were also studied. Doping of Sr3Ti2O7-δ with Co was found to be effective for improving the electrical conductivity as well as the oxygen permeation rate, which could be assigned to the increased oxygen vacancy concentration by doping Co3+ into Ti4+ sites. The nonstoichiometric oxygen of these oxides was measured by using a thermal gravimetric method. The creation of oxygen vacancies, which is compensated with Co3+ doping, leads to higher oxide ion conductivity. The oxygen permeation rate monotonously increased with increasing amounts of Co in the Ti site. Sr3Ti0.8Co1.2O 7-δ exhibited high oxide ion conductivity and a large oxygen permeation rate. The highest oxygen permeation rate achieved a value of 2.02 cc min-1 cm-2 at 1273 K for Sr3Ti 0.8Co1.2O7-δ. Neutron diffraction analysis and redox titration suggests that the oxygen diffusion occurs through oxygen vacancies in the perovskite block, but not through excess oxygen in the rock salt block.",
author = "Sirikanda Nuansaeng and Masatomo Yashima and Maki Matsuka and Tatsumi Ishihara",
year = "2011",
month = "9",
day = "26",
doi = "10.1002/chem.201003644",
language = "English",
volume = "17",
pages = "11324--11331",
journal = "Chemistry - A European Journal",
issn = "0947-6539",
publisher = "Wiley-VCH Verlag",
number = "40",

}

TY - JOUR

T1 - Mixed conductivity, nonstoichiometric oxygen, and oxygen permeation properties in Co-doped Sr3Ti2O7-δ

AU - Nuansaeng, Sirikanda

AU - Yashima, Masatomo

AU - Matsuka, Maki

AU - Ishihara, Tatsumi

PY - 2011/9/26

Y1 - 2011/9/26

N2 - Electrical conductivity and oxygen permeation rates in Co-doped Sr 3Ti2O7-δ with Ruddesden-Popper type structures were investigated. The effects of metal dopants (M) in the Ti site of Sr3Ti2(M)O7-δ on the mixed conductivity were also studied. Doping of Sr3Ti2O7-δ with Co was found to be effective for improving the electrical conductivity as well as the oxygen permeation rate, which could be assigned to the increased oxygen vacancy concentration by doping Co3+ into Ti4+ sites. The nonstoichiometric oxygen of these oxides was measured by using a thermal gravimetric method. The creation of oxygen vacancies, which is compensated with Co3+ doping, leads to higher oxide ion conductivity. The oxygen permeation rate monotonously increased with increasing amounts of Co in the Ti site. Sr3Ti0.8Co1.2O 7-δ exhibited high oxide ion conductivity and a large oxygen permeation rate. The highest oxygen permeation rate achieved a value of 2.02 cc min-1 cm-2 at 1273 K for Sr3Ti 0.8Co1.2O7-δ. Neutron diffraction analysis and redox titration suggests that the oxygen diffusion occurs through oxygen vacancies in the perovskite block, but not through excess oxygen in the rock salt block.

AB - Electrical conductivity and oxygen permeation rates in Co-doped Sr 3Ti2O7-δ with Ruddesden-Popper type structures were investigated. The effects of metal dopants (M) in the Ti site of Sr3Ti2(M)O7-δ on the mixed conductivity were also studied. Doping of Sr3Ti2O7-δ with Co was found to be effective for improving the electrical conductivity as well as the oxygen permeation rate, which could be assigned to the increased oxygen vacancy concentration by doping Co3+ into Ti4+ sites. The nonstoichiometric oxygen of these oxides was measured by using a thermal gravimetric method. The creation of oxygen vacancies, which is compensated with Co3+ doping, leads to higher oxide ion conductivity. The oxygen permeation rate monotonously increased with increasing amounts of Co in the Ti site. Sr3Ti0.8Co1.2O 7-δ exhibited high oxide ion conductivity and a large oxygen permeation rate. The highest oxygen permeation rate achieved a value of 2.02 cc min-1 cm-2 at 1273 K for Sr3Ti 0.8Co1.2O7-δ. Neutron diffraction analysis and redox titration suggests that the oxygen diffusion occurs through oxygen vacancies in the perovskite block, but not through excess oxygen in the rock salt block.

UR - http://www.scopus.com/inward/record.url?scp=80052932913&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052932913&partnerID=8YFLogxK

U2 - 10.1002/chem.201003644

DO - 10.1002/chem.201003644

M3 - Article

C2 - 21850721

AN - SCOPUS:80052932913

VL - 17

SP - 11324

EP - 11331

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

SN - 0947-6539

IS - 40

ER -