Surface oxygen exchange properties of bismuth oxide-based solid electrolytes and electrode materials

Bernard A. Boukamp, I.C. Vinke, K.J. de Vries, A.J. Burggraaf

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Abstract

The surface oxygen exchange coefficient, ks, has been measured for the solid solution (Bi2O3)0.75(Er2O3)0.25 and (Bi2O3)0.6(Tb2O3)0.4 (abbreviated BE25 and BT40), using gas-phase 18O exchange techniques. The activation enth alpy of ks amounts to ΔE=110 kJ/molforBT40 andΔE=130 kJ/molforBE25. The magnitude of ks for the purely ionic conducting BE25 is comparable with values obtained from electrode polarization (I−V) measurements (ΔE=140 kJ/mol.) The comparatively high ks values show a (PO2)n dependence on oxygen pressure with values of n close to 0.5, indicating surface control in the oxygen transport process. Bismuth oxide containing solid solutions show a large activity in the oxygen exchange reaction with the gas phase.
Original languageUndefined
Pages (from-to)918-923
JournalSolid state ionics
Volume32-33
Issue numberPart 2
DOIs
Publication statusPublished - 1989

Keywords

  • IR-70447

Cite this

Boukamp, Bernard A. ; Vinke, I.C. ; de Vries, K.J. ; Burggraaf, A.J. / Surface oxygen exchange properties of bismuth oxide-based solid electrolytes and electrode materials. In: Solid state ionics. 1989 ; Vol. 32-33, No. Part 2. pp. 918-923.
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abstract = "The surface oxygen exchange coefficient, ks, has been measured for the solid solution (Bi2O3)0.75(Er2O3)0.25 and (Bi2O3)0.6(Tb2O3)0.4 (abbreviated BE25 and BT40), using gas-phase 18O exchange techniques. The activation enth alpy of ks amounts to ΔE=110 kJ/molforBT40 andΔE=130 kJ/molforBE25. The magnitude of ks for the purely ionic conducting BE25 is comparable with values obtained from electrode polarization (I−V) measurements (ΔE=140 kJ/mol.) The comparatively high ks values show a (PO2)n dependence on oxygen pressure with values of n close to 0.5, indicating surface control in the oxygen transport process. Bismuth oxide containing solid solutions show a large activity in the oxygen exchange reaction with the gas phase.",
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Surface oxygen exchange properties of bismuth oxide-based solid electrolytes and electrode materials. / Boukamp, Bernard A.; Vinke, I.C.; de Vries, K.J.; Burggraaf, A.J.

In: Solid state ionics, Vol. 32-33, No. Part 2, 1989, p. 918-923.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - Surface oxygen exchange properties of bismuth oxide-based solid electrolytes and electrode materials

AU - Boukamp, Bernard A.

AU - Vinke, I.C.

AU - de Vries, K.J.

AU - Burggraaf, A.J.

PY - 1989

Y1 - 1989

N2 - The surface oxygen exchange coefficient, ks, has been measured for the solid solution (Bi2O3)0.75(Er2O3)0.25 and (Bi2O3)0.6(Tb2O3)0.4 (abbreviated BE25 and BT40), using gas-phase 18O exchange techniques. The activation enth alpy of ks amounts to ΔE=110 kJ/molforBT40 andΔE=130 kJ/molforBE25. The magnitude of ks for the purely ionic conducting BE25 is comparable with values obtained from electrode polarization (I−V) measurements (ΔE=140 kJ/mol.) The comparatively high ks values show a (PO2)n dependence on oxygen pressure with values of n close to 0.5, indicating surface control in the oxygen transport process. Bismuth oxide containing solid solutions show a large activity in the oxygen exchange reaction with the gas phase.

AB - The surface oxygen exchange coefficient, ks, has been measured for the solid solution (Bi2O3)0.75(Er2O3)0.25 and (Bi2O3)0.6(Tb2O3)0.4 (abbreviated BE25 and BT40), using gas-phase 18O exchange techniques. The activation enth alpy of ks amounts to ΔE=110 kJ/molforBT40 andΔE=130 kJ/molforBE25. The magnitude of ks for the purely ionic conducting BE25 is comparable with values obtained from electrode polarization (I−V) measurements (ΔE=140 kJ/mol.) The comparatively high ks values show a (PO2)n dependence on oxygen pressure with values of n close to 0.5, indicating surface control in the oxygen transport process. Bismuth oxide containing solid solutions show a large activity in the oxygen exchange reaction with the gas phase.

KW - IR-70447

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DO - 10.1016/0167-2738(89)90376-7

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SN - 0167-2738

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