Three-electrode current-voltage measurements on erbia-stabilized bismuth oxide with sputtered noble metal electrodes

I.C. Vinke; B.A. Boukamp; K.J. de Vries; A.J. Burggraaf

doi:10.1016/0167-2738(92)90207-6

Three-electrode current-voltage measurements on erbia-stabilized bismuth oxide with sputtered noble metal electrodes

I.C. Vinke, B.A. Boukamp^*, K.J. de Vries, A.J. Burggraaf

^*Corresponding author for this work

Inorganic Materials Science

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Abstract

The anodic and cathodic polarization behaviour of sputtered porous gold electrodes on (Bi2O3)0.75(Er2O3)0.25 (abbreviated BE25) was studied as function of temperature and oxygen partial pressure using a three-electrode cell. The anodic polarization is smaller than the cathodic polarization, allowing current densities of 2 × 103 A m−2 at 0.1 V and 1041 K in oxygen for oxygen evolution. Comparison with the polarization behaviour of similar sputtered platinum electrodes on BE25 shows little effect of the electrode material on the exchange current densities. This indicates that the electrolyte surface is active in the oxygen transfer process, while the noble metal electrode serves merely as current collector. Analysis of the electrode impedance shows strong influence of surface diffusion on the electrode reaction(s). For the exchange current density an unusual Po2 dependence is observed.

Original language	English
Pages (from-to)	249-259
Number of pages	10
Journal	Solid state ionics
Volume	51
Issue number	3-4
DOIs	https://doi.org/10.1016/0167-2738(92)90207-6
Publication status	Published - 1992

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title = "Three-electrode current-voltage measurements on erbia-stabilized bismuth oxide with sputtered noble metal electrodes",

abstract = "The anodic and cathodic polarization behaviour of sputtered porous gold electrodes on (Bi2O3)0.75(Er2O3)0.25 (abbreviated BE25) was studied as function of temperature and oxygen partial pressure using a three-electrode cell. The anodic polarization is smaller than the cathodic polarization, allowing current densities of 2 × 103 A m−2 at 0.1 V and 1041 K in oxygen for oxygen evolution. Comparison with the polarization behaviour of similar sputtered platinum electrodes on BE25 shows little effect of the electrode material on the exchange current densities. This indicates that the electrolyte surface is active in the oxygen transfer process, while the noble metal electrode serves merely as current collector. Analysis of the electrode impedance shows strong influence of surface diffusion on the electrode reaction(s). For the exchange current density an unusual Po2 dependence is observed.",

author = "I.C. Vinke and B.A. Boukamp and {de Vries}, K.J. and A.J. Burggraaf",

year = "1992",

doi = "10.1016/0167-2738(92)90207-6",

language = "English",

volume = "51",

pages = "249--259",

journal = "Solid state ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

number = "3-4",

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TY - JOUR

T1 - Three-electrode current-voltage measurements on erbia-stabilized bismuth oxide with sputtered noble metal electrodes

AU - Vinke, I.C.

AU - Boukamp, B.A.

AU - de Vries, K.J.

AU - Burggraaf, A.J.

PY - 1992

Y1 - 1992

N2 - The anodic and cathodic polarization behaviour of sputtered porous gold electrodes on (Bi2O3)0.75(Er2O3)0.25 (abbreviated BE25) was studied as function of temperature and oxygen partial pressure using a three-electrode cell. The anodic polarization is smaller than the cathodic polarization, allowing current densities of 2 × 103 A m−2 at 0.1 V and 1041 K in oxygen for oxygen evolution. Comparison with the polarization behaviour of similar sputtered platinum electrodes on BE25 shows little effect of the electrode material on the exchange current densities. This indicates that the electrolyte surface is active in the oxygen transfer process, while the noble metal electrode serves merely as current collector. Analysis of the electrode impedance shows strong influence of surface diffusion on the electrode reaction(s). For the exchange current density an unusual Po2 dependence is observed.

AB - The anodic and cathodic polarization behaviour of sputtered porous gold electrodes on (Bi2O3)0.75(Er2O3)0.25 (abbreviated BE25) was studied as function of temperature and oxygen partial pressure using a three-electrode cell. The anodic polarization is smaller than the cathodic polarization, allowing current densities of 2 × 103 A m−2 at 0.1 V and 1041 K in oxygen for oxygen evolution. Comparison with the polarization behaviour of similar sputtered platinum electrodes on BE25 shows little effect of the electrode material on the exchange current densities. This indicates that the electrolyte surface is active in the oxygen transfer process, while the noble metal electrode serves merely as current collector. Analysis of the electrode impedance shows strong influence of surface diffusion on the electrode reaction(s). For the exchange current density an unusual Po2 dependence is observed.

U2 - 10.1016/0167-2738(92)90207-6

DO - 10.1016/0167-2738(92)90207-6

M3 - Article

SN - 0167-2738

VL - 51

SP - 249

EP - 259

JO - Solid state ionics

JF - Solid state ionics

IS - 3-4

ER -

Three-electrode current-voltage measurements on erbia-stabilized bismuth oxide with sputtered noble metal electrodes

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