Details
| Original language | English |
|---|---|
| Pages (from-to) | 3569-3575 |
| Number of pages | 7 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 6 |
| Issue number | 13 |
| Publication status | Published - 19 Apr 2004 |
Abstract
The work function (WF) changes which are induced by electrochemical pumping on porous Pt electrodes on yttrium stabilized zirconia (YSZ) have been studied with a Kelvin probe as an integral and a photoemission electron microscope as a spatially resolving method, respectively. The comparison of the measurements demonstrates that besides true spillover via surface diffusion of oxygen, electrostatic effects are also present. These electrostatic effects arising from the fact that not all parts of a porous metal electrode are in electrical contact contribute to the WF signal measured with a Kelvin probe. Experiments with Pt electrodes prepared differently show that the preparation of the porous metal electrodes has a strong influence on the electrostatic contribution.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Physical Chemistry Chemical Physics, Vol. 6, No. 13, 19.04.2004, p. 3569-3575.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Work function changes and electrochemical pumping of platinum electrodes on yttrium stabilized zirconia
AU - Neubrand, T.
AU - Günther, S.
AU - Fenske, A.
AU - Imbihl, R.
PY - 2004/4/19
Y1 - 2004/4/19
N2 - The work function (WF) changes which are induced by electrochemical pumping on porous Pt electrodes on yttrium stabilized zirconia (YSZ) have been studied with a Kelvin probe as an integral and a photoemission electron microscope as a spatially resolving method, respectively. The comparison of the measurements demonstrates that besides true spillover via surface diffusion of oxygen, electrostatic effects are also present. These electrostatic effects arising from the fact that not all parts of a porous metal electrode are in electrical contact contribute to the WF signal measured with a Kelvin probe. Experiments with Pt electrodes prepared differently show that the preparation of the porous metal electrodes has a strong influence on the electrostatic contribution.
AB - The work function (WF) changes which are induced by electrochemical pumping on porous Pt electrodes on yttrium stabilized zirconia (YSZ) have been studied with a Kelvin probe as an integral and a photoemission electron microscope as a spatially resolving method, respectively. The comparison of the measurements demonstrates that besides true spillover via surface diffusion of oxygen, electrostatic effects are also present. These electrostatic effects arising from the fact that not all parts of a porous metal electrode are in electrical contact contribute to the WF signal measured with a Kelvin probe. Experiments with Pt electrodes prepared differently show that the preparation of the porous metal electrodes has a strong influence on the electrostatic contribution.
UR - http://www.scopus.com/inward/record.url?scp=4043098298&partnerID=8YFLogxK
U2 - 10.1039/b314293k
DO - 10.1039/b314293k
M3 - Article
AN - SCOPUS:4043098298
VL - 6
SP - 3569
EP - 3575
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 13
ER -