Protonic and electronic conductivities of terbium doped strontium cerates

Xiaotong Wei, Y. S. Lin

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Electronic and protonic conductivities of Tb doped SrCeO3 were measured in a hydrogen containing and hydrogen-free atmosphere of the same oxygen partial pressure in 500-900 °C. In a H2 containing atmosphere, the material exhibits mixed electronic and proton-conductivity and, for SrCe0.95Tb0.05O3-δ, the proton transfer number increases with decreasing temperature, from about 0.4 at 900 °C to about 0.8 at 500 °C. The total conductivity for SrCe0.95Tb0.05O3-δ decreases from about 3 × 10- 3 S/cm in the reducing atmosphere to 4 × 10- 5 S/cm in air at 900 °C with an activation energy respectively of 39 kJ/mol and 76 kJ/mol for protonic and n-type electronic conduction. Results of XRD analysis show a decrease in the lattice volume of the SrCe1-xTb xO3-δ with increasing Tb concentration. SrCe1-xTb xO3-δ exhibits negligible proton-conductivity with x smaller than 0.005. At 800 °C under a reducing atmosphere, SrCe1-xTbxO3-δ, with x > 0.005, are mixed electronic and proton conductors with a maximum proton-conductivity of about 3 × 10- 3 S/cm at x = 0.025 and proton transfer number of about 0.7 for x in the range of 0.005-0.125.

Original languageEnglish (US)
Pages (from-to)1804-1810
Number of pages7
JournalSolid State Ionics
Volume178
Issue number35-36
DOIs
StatePublished - Feb 15 2008

Fingerprint

Terbium
Strontium
Proton conductivity
terbium
strontium
Proton transfer
conductivity
protons
Hydrogen
electronics
atmospheres
Partial pressure
Protons
Activation energy
free atmosphere
Oxygen
hydrogen
Air
partial pressure
conductors

Keywords

  • Conductivity
  • Oxygen vacancy
  • Strontium cerate
  • Terbium

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Protonic and electronic conductivities of terbium doped strontium cerates. / Wei, Xiaotong; Lin, Y. S.

In: Solid State Ionics, Vol. 178, No. 35-36, 15.02.2008, p. 1804-1810.

Research output: Contribution to journalArticle

@article{e710440f61404bb89fb3fa28f12d7a11,
title = "Protonic and electronic conductivities of terbium doped strontium cerates",
abstract = "Electronic and protonic conductivities of Tb doped SrCeO3 were measured in a hydrogen containing and hydrogen-free atmosphere of the same oxygen partial pressure in 500-900 °C. In a H2 containing atmosphere, the material exhibits mixed electronic and proton-conductivity and, for SrCe0.95Tb0.05O3-δ, the proton transfer number increases with decreasing temperature, from about 0.4 at 900 °C to about 0.8 at 500 °C. The total conductivity for SrCe0.95Tb0.05O3-δ decreases from about 3 × 10- 3 S/cm in the reducing atmosphere to 4 × 10- 5 S/cm in air at 900 °C with an activation energy respectively of 39 kJ/mol and 76 kJ/mol for protonic and n-type electronic conduction. Results of XRD analysis show a decrease in the lattice volume of the SrCe1-xTb xO3-δ with increasing Tb concentration. SrCe1-xTb xO3-δ exhibits negligible proton-conductivity with x smaller than 0.005. At 800 °C under a reducing atmosphere, SrCe1-xTbxO3-δ, with x > 0.005, are mixed electronic and proton conductors with a maximum proton-conductivity of about 3 × 10- 3 S/cm at x = 0.025 and proton transfer number of about 0.7 for x in the range of 0.005-0.125.",
keywords = "Conductivity, Oxygen vacancy, Strontium cerate, Terbium",
author = "Xiaotong Wei and Lin, {Y. S.}",
year = "2008",
month = "2",
day = "15",
doi = "10.1016/j.ssi.2007.11.022",
language = "English (US)",
volume = "178",
pages = "1804--1810",
journal = "Solid State Ionics",
issn = "0167-2738",
publisher = "Elsevier",
number = "35-36",

}

TY - JOUR

T1 - Protonic and electronic conductivities of terbium doped strontium cerates

AU - Wei, Xiaotong

AU - Lin, Y. S.

PY - 2008/2/15

Y1 - 2008/2/15

N2 - Electronic and protonic conductivities of Tb doped SrCeO3 were measured in a hydrogen containing and hydrogen-free atmosphere of the same oxygen partial pressure in 500-900 °C. In a H2 containing atmosphere, the material exhibits mixed electronic and proton-conductivity and, for SrCe0.95Tb0.05O3-δ, the proton transfer number increases with decreasing temperature, from about 0.4 at 900 °C to about 0.8 at 500 °C. The total conductivity for SrCe0.95Tb0.05O3-δ decreases from about 3 × 10- 3 S/cm in the reducing atmosphere to 4 × 10- 5 S/cm in air at 900 °C with an activation energy respectively of 39 kJ/mol and 76 kJ/mol for protonic and n-type electronic conduction. Results of XRD analysis show a decrease in the lattice volume of the SrCe1-xTb xO3-δ with increasing Tb concentration. SrCe1-xTb xO3-δ exhibits negligible proton-conductivity with x smaller than 0.005. At 800 °C under a reducing atmosphere, SrCe1-xTbxO3-δ, with x > 0.005, are mixed electronic and proton conductors with a maximum proton-conductivity of about 3 × 10- 3 S/cm at x = 0.025 and proton transfer number of about 0.7 for x in the range of 0.005-0.125.

AB - Electronic and protonic conductivities of Tb doped SrCeO3 were measured in a hydrogen containing and hydrogen-free atmosphere of the same oxygen partial pressure in 500-900 °C. In a H2 containing atmosphere, the material exhibits mixed electronic and proton-conductivity and, for SrCe0.95Tb0.05O3-δ, the proton transfer number increases with decreasing temperature, from about 0.4 at 900 °C to about 0.8 at 500 °C. The total conductivity for SrCe0.95Tb0.05O3-δ decreases from about 3 × 10- 3 S/cm in the reducing atmosphere to 4 × 10- 5 S/cm in air at 900 °C with an activation energy respectively of 39 kJ/mol and 76 kJ/mol for protonic and n-type electronic conduction. Results of XRD analysis show a decrease in the lattice volume of the SrCe1-xTb xO3-δ with increasing Tb concentration. SrCe1-xTb xO3-δ exhibits negligible proton-conductivity with x smaller than 0.005. At 800 °C under a reducing atmosphere, SrCe1-xTbxO3-δ, with x > 0.005, are mixed electronic and proton conductors with a maximum proton-conductivity of about 3 × 10- 3 S/cm at x = 0.025 and proton transfer number of about 0.7 for x in the range of 0.005-0.125.

KW - Conductivity

KW - Oxygen vacancy

KW - Strontium cerate

KW - Terbium

UR - http://www.scopus.com/inward/record.url?scp=38649122709&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38649122709&partnerID=8YFLogxK

U2 - 10.1016/j.ssi.2007.11.022

DO - 10.1016/j.ssi.2007.11.022

M3 - Article

AN - SCOPUS:38649122709

VL - 178

SP - 1804

EP - 1810

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

IS - 35-36

ER -